FCC ID: AFJIC-R75 Scanning Receiver

 

INSTRUCTION MANUAL COMMUNICATIONS RECEIVER iR75 IMPORTANT READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the receiver. SAVE THIS INSTRUCTION MANUAL. This manual contains important safety and operating instructions for the IC-R75. EXPLICIT DEFINITIONS TRADEMARKS WORD R WARNING CAUTION NOTE DEFINITION Personal injury, fire hazard or electric shock may occur. Equipment damage may occur. If disregarded, inconvenience only. No risk of personal injury, fire or electric shock. Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries. Microsoft and Windows are registered trademarks of Microsoft Corporation in the United States and other countries. Pentium is a registered trademark of Intel Corporation. All other products or brands are registered trademarks or trademarks of their respective holders. i PRECAUTIONS RWARNING NEVER apply AC to the [DC13.8V]

jack on the receiver rear panel. This could cause a fire or ruin the receiver. RWARNING NEVER apply more than 16 V DC, such as a 24 V battery, to the [DC13.8V] jack on the receiver rear panel. This could cause a fire or ruin the receiver. RWARNING NEVER let metal, wire or other objects touch any internal part or connectors on the rear panel of the receiver. This may result in an electric shock. NEVER expose the receiver to rain, snow or any liquids. DO NOT use or place the receiver in areas with temperatures below 10C (+14F) or above +60C

(+140F). Be aware that temperatures on a vehicles dashboard can exceed 80C (+176F), resulting in permanent damage to the receiver if left there for extended periods. DO NOT place the receiver in excessively dusty environments or in direct sunlight. DO NOT place the receiver against walls or putting anything on top of the receiver. This will obstruct heat dissipation. Place unit in a secure place to avoid inadvertent use by children. During mobile operation, DO NOT operate the receiver without running the vehicles engine. When receiver power is ON and your vehicles engine is OFF, the vehicles battery will soon become exhausted. Make sure the receiver power is OFF before starting the vehicle. This will avoid possible damage to the receiver by ignition voltage spikes. For U.S.A only CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FOR CLASS B UNINTENTIONAL RADIATORS This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Versions of the IC-R75 which display the CE symbol on the serial number label comply with the European harmonised standard ETS300 684 (EMC product standard for Commercially Available Amateur Radio Equipment). ii SUPPLIED ACCESSORIES The receiver comes with the following accessories. Qty. q AC adapter (AD-55/A/S/V)* ................................ 1 w DC power cable (OPC-869)* ............................... 1 e Fuse (FGB 3 A; internal use) .............................. 1 r Fuse (FGB 3 A; for DC cable)* ............................ 2

* Either AC adapter + 1 fuse (q, e) or DC power cable + 3 fuses (w, e, r) are supplied depending on versions. The AD-55, AD-55A, AD-55S and AD-55V have different shapes. q w e r INFORMATION A switching type AC adapter includes a switching regulator. The receiver could receive switching noise from the adapters switching regulator circuit. Depending on the usage environment, it tends to happen in AM reception, especially around 7 to 10 MHz. If it causes interference, please try some of the following to reduce the noise. Ground the receiver. When another AC powered equipment is connected to the receiver, plug the AC adapter into a different AC outlet than the equipment. Keep the AC adapter as far away from the receivers antenna and any metal objects as possible. Attach an AC line filter to the AC adapter. iii IMPORTANT ............................................................. i EXPLICIT DEFINITIONS .......................................... i TRADEMARKS ......................................................... i PRECAUTIONS ........................................................ ii SUPPLIED ACCESSORIES .................................... iii 1 TABLE OF CONTENTS ....................................... 1 2 PANEL DESCRIPTION .................................. 2 6 Front panel ....................................................... 2 Function display ............................................... 5 Rear panel ........................................................ 6 3 INSTALLATION AND CONNECTIONS ....... 7 10 Grounding ........................................................ 7 Receiver stand ................................................. 7 Optional bracket and carrying handle ............... 7 Connections ..................................................... 8 Antenna connection ......................................... 9 Tape recorder connections ............................... 9 Transceive function ........................................... 9 FSK and AFSK (SSTV) connections .............. 10 Connecting to a PC ........................................ 10 4 FREQUENCY SETTING ............................ 11 13 Read me first .................................................. 11 Using the keypad ............................................ 11 Frequency setting ........................................... 12 Dial lock function ............................................ 13 5 RECEIVE FUNCTIONS ............................. 14 20 Mode selection ............................................... 14 Squelch and RF gain ...................................... 14 Twin PBT operation ........................................ 15 Noise blanker ................................................. 15 Preamp ........................................................... 16 Attenuator ....................................................... 16 AGC time constant ......................................... 16 Antenna selection ........................................... 16 CW reverse mode .......................................... 17 CW pitch control ............................................. 17 RTTY reverse mode ....................................... 17 Filter selection ................................................ 18 Filter set mode ............................................... 19 Optional noise reduction function ................... 20 Optional auto notch function .......................... 20 TABLE OF CONTENTS 1 6 MEMORY OPERATION ............................. 21 24 Memory channels ........................................... 21 Memory channel selection ............................. 21 Memory channel programming ...................... 22 Frequency transferring ................................... 23 Memory names .............................................. 24 Memory clearing ............................................ 24 7 SCANS ...................................................... 25 27 Scan types ..................................................... 25 Preparation ..................................................... 25 Programmed scan operation .......................... 26 Memory/select memory scan operation ......... 26 Setting select memory channels .................... 26 Priority watch operation .................................. 27 Auto memory write scan operation ................. 27 8 CLOCK AND TIMERS ............................... 28 29 Setting the current time .................................. 28 Setting power-on time .................................... 28 Setting power-off time .................................... 29 Setting sleep timer period .............................. 29 9 SET MODE ................................................ 30 33 Set mode description ..................................... 30 10 OPTION INSTALLATIONS ..................... 34 35 Opening the receivers case ........................... 34 CR-282 HIGH STABILITY CRYSTAL UNIT ......... 34 UT-102 VOICE SYNTHESIZER UNIT ................. 34 UT-106 DSP UNIT ............................................ 35 Optional IF filters ............................................ 35 11 MAINTENANCE ...................................... 36 37 Troubleshooting .............................................. 36 Resetting the CPU ......................................... 36 Fuse replacement .......................................... 37 Clock backup battery replacement ................. 37 12 SPECIFICATIONS ........................................... 38 13 OPTIONS ........................................................ 39 14 CONTROL COMMAND ........................... 40 43 Remote jack (CI-V) information ...................... 40 1 2 PANEL DESCRIPTION Front panel Speaker Function display (p. 5)

!8

!6!7

!5 COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS q w AF RF/SQL TWIN PBT PHONES POWER ANT SET CLOCK 1 2ABC 3DEF 4GHI 5JKL 6MNO 7PRS

. 8TUV 9WXY 0QZ ENT V/M MW CLR SEL SCAN DN UP

!4

!3

!2 P.AMP ATT NR ANF NB AGC LOCK e r t y u i o

!0 !1 q POWER SWITCH [POWER]

Push momentarily to turn power ON. Push for 2 sec. to turn power OFF. Turn the optional DC power supply ON in advance. w HEADPHONE JACK [PHONES] (p. 8) Accepts headphones. When headphones are connected, the internal speaker or connected external speaker does not function. e AF CONTROL [AF] (inner control) Varies the audio output level from the speaker. r RF GAIN/SQUELCH CONTROL [RF/SQL]

(outer control; pgs. 14, 30) Adjusts the squelch threshold level. The squelch removes noise output from the speaker (closed condition) when no signal is received. The squelch is particularly effective for FM. It is also available for other modes. The control can be set as the squelch plus RF gain controls or squelch control only (RF gain is fixed at maximum) in set mode. t PASSBAND TUNING CONTROLS [TWIN PBT]

(p. 15) Adjust the receivers passband width of the 455 kHz and 9 kHz IF filters for the inner and outer controls, respectively. Set to the center positions when not in use. y CLOCK MODE SWITCH [CLOCK] (p. 28) Toggles between frequency indication and clock indication when pushed. u ANTENNA SELECTOR/SET MODE SWITCH

[ANT/SET] (pgs. 16, 30) While in a frequency indication, enters set mode when pushed. While in a frequency indication, toggles between the antenna 1 and 2 connectors when pushed for 2 sec. While in the clock indication, enters time setting condition when pushed for 2 sec. While in a timer indication, toggles the timer ON or OFF when pushed. i TUNING DIAL Changes the displayed frequency, selects set mode items, etc. o TUNING DIAL TENSION LATCH Adjusts the tension of the tuning dial.

!0 LOCK/SPEECH SWITCH [LOCK] (pgs. 13, 34) Toggles the frequency lock function ON and OFF. Announces the selected readout frequency when an optional UT-102 is installed and when pushed for 2 sec. 2 PANEL DESCRIPTION 2

!1 MEMORY CHANNEL UP/DOWN SWITCHES

[ DN]/[UP ] (p. 21) Select a memory channel. Select a set mode contents while in set mode. Select a timer or time indication while in clock

!7 FILTER SWITCH [FIL] (pgs. 18, 19) Push momentarily to toggle between the pre-

programmed normal, wide and narrow IF filters for the selected operating mode. Push for 2 sec. to enter filter set mode. indication. Select a filter set mode contents while in filter

!8 MODE SWITCHES [SSB]/[CW/RTTY]/[AM]/[FM]

(p. 14) Select an operating mode. Push [SSB] to toggle between LSB and USB. Push [CW/RTTY] to toggle between CW and RTTY. Push [CW/RTTY] for 2 sec. to toggle between CW and CW reverse or RTTY and RTTY reverse. Push [AM] to select AM. Push [FM] to select FM. set mode.

!2 MEMORY WRITE SWITCH [MW] (pgs. 22, 27) Stores the displayed frequency and operating mode into the selected memory channel when pushed for 2 sec. Toggles the programmed scan and auto memory write scan when pushed.

!3 CLEAR SWITCH [CLR] (p. 24) Clears the input digits while inputting a frequency or memory channel number. Clears the selected memory channel contents when pushed for 2 sec. in memory mode. This switch does not function in VFO mode.

!4 VFO/MEMORY SWITCH [V/M] (pgs. 21, 23) Toggles the operating mode between VFO mode and memory mode when pushed. Selects a memory channel for inputting a memory channel number when pushed. Transfers the memory contents to VFO when pushed for 2 sec.

!5 KEYPAD (pgs. 11, 21) The keypad can be used for several functions as below:

Keypad then [ENT]

Direct frequency input. Keypad then [V/M]

Memory channel selection.

[ENT] then keypad in memory name indication mode Alphanumeric input for memory name, etc.

!6 QUICK TUNING STEP SWITCH [TS] (pgs. 12, 13) Selects a quick tuning step or turns the quick tuning step OFF. While the quick tuning indicator () is displayed, the frequency can be changed in kHz or MHz steps. While the quick tuning step is OFF, turns the 1 Hz step ON and OFF when pushed for 2 sec. 1 Hz indication appears and the frequency can be changed in 1 Hz steps. While the kHz quick tuning step is selected, enters tuning step set mode when pushed for 2 sec. While the memory name indication is selected in memory mode, pushing this switch shows the operating frequency; and rotating the tuning dial while pushing this switch changes the frequency temporally. 3 2 PANEL DESCRIPTION Front panel (continued) Function display (p. 5) COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS AF RF/SQL TWIN PBT PHONES POWER ANT SET CLOCK 1 2ABC 3DEF 4GHI 5JKL 6MNO 7PRS

. 8TUV 9WXY 0QZ ENT V/M MW CLR SEL SCAN DN UP

@6

@5 P.AMP ATT NR ANF NB AGC LOCK

!9 @0 @1 @2 @3 @4

@4 AGC SWITCH [AGC] (p. 16) Toggles the AGC (Automatic Gain Control) time constant fast and slow when pushed. Toggles the AGC function ON and OFF when pushed for 2 sec.

@5 SELECT SWITCH [SEL] (pgs. 24, 26) Toggles the select memory setting ON and OFF when pushed in memory mode. Toggles the memory name indication ON and OFF when pushed for 2 sec. in memory mode.

@6 SCAN SWITCH [SCAN] (p. 25) Push momentarily to start/stop the programmed scan in VFO mode. Push momentarily to start/stop the memory scan in memory mode. Push for 2 sec. to start the priority watch in VFO mode. Push [SCAN] again to cancel the priority watch.

!9 PREAMP SWITCH [P.AMP] (p. 16)

Push to toggle between preamp-1 and preamp-2 or turn the preamp OFF.

@0 ATTENUATOR SWITCH [ATT] (p. 16)

Push to toggle the 20 dB attenuator function ON and OFF.

@1 NOISE REDUCTION SWITCH [NR] (p. 20) Toggles the optional noise reduction function ON and OFF when pushed. Functions in SSB, CW and RTTY modes. An optional UT-106 DSP UNIT is required. Enters noise reduction level set mode when pushed for 2 sec. An optional UT-106 DSP UNIT is required.

@2 AUTOMATIC NOTCH FILTER SWITCH [ANF]

(p. 20) Push to turn the optional automatic notch filter for receiving AM signals ON and OFF. An optional UT-106 DSP UNIT is required.

@3 NOISE BLANKER SWITCH [NB] (p. 15) Toggles the noise blanker ON and OFF. The noise blanker reduces pulse-type noise such as that generated by automobile ignition systems. This function is not effective for FM, or non pulse-type noise. 4 PANEL DESCRIPTION 2 Function display q w e r t y TIMER DSP ANF NR LOCK S1

@1

@0

!9

!8 NW REV LSBUSBCW S-AMFM RTTY R X PREAMP 7 5 3 1 2 ATT 20 9 1 ANT 2 40 60dB BLANK BLANK F.AGC OFF N B VFO MEMO SCAN S u i o !0 !1 !2 !3 !4

!7

!6

!5 q TIMER INDICATOR (p. 28) Appears when power on/off timer or sleep timer is in use. w DSP UNIT INDICATOR (p. 35) Appears when an optional UT-106 DSP UNIT is installed. e AUTOMATIC NOTCH FILTER INDICATOR (p. 20) Appears when the optional automatic notch filter is in use. r NOISE REDUCTION INDICATOR (p. 20) Appears when the optional noise reduction function is in use. t LOCK INDICATOR (p. 13) Appears when the dial lock function is in use. y SIGNAL METER Shows the relative receive signal strength. Shows the S-meter squelch level when used. u PREAMP INDICATOR (p. 16) Appears when antenna preamp-1 or preamp-2 is in use. i ATTENUATOR INDICATOR (p. 16) Appears when the attenuator function is in use. o ANTENNA INDICATORS (p. 16) Indicate which antenna connector is in use.

!0 NOISE BLANKER INDICATOR (p. 15) Appears when the noise blanker function is in use.

!1 SCAN INDICATOR (p. 25) Appears when scan or priority watch is activated. Flashes when scan or priority watch is paused.

!2 AGC INDICATORS (p. 16) AGC appears when slow AGC time constant is selected. F.AGC appears when fast AGC time constant is selected. AGC OFF appears when the AGC function is turned OFF. F.AGC blinks while scanning or while using band scope via an optional RS-R75.

!3 MEMORY MODE INDICATOR (p. 21) Indicates memory mode is selected.

!4 VFO MODE INDICATOR Indicates VFO mode is selected.

!5 MEMORY CHANNEL NUMBER READOUT

(p. 21) Shows the selected memory channel number. S appears when the displayed memor y channel is designated as a select memory channel.

!6 BLANK MEMORY INDICATOR Shows that the displayed memory channel is not programmed. This indicator appears both in VFO and memory modes.

!7 FREQUENCY READOUT Shows the operating frequency.

!8 RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open.

!9 MODE INDICATORS (p. 14) Indicate the selected operating mode.

@0 REVERSE MODE INDICATOR (p. 17) Indicates a reverse operating mode is selected.

@1 WIDE/NARROW FILTER INDICATORS (p. 18) appears when the wide IF filter is selected. appears when the narrow IF filter is selected. 5 2 PANEL DESCRIPTION Rear panel q w e r t y u i o !0 u GROUND TERMINAL [GND] (p. 7) Connects the black terminal to ground. i ANTENNA 2 TERMINAL [ANT 2] (p. 9) Connects the red terminal to a 500 long wire antenna. o ANTENNA 1 CONNECTOR [ANT 1] (p. 9) Connects a 50 antenna with a PL-259 connector and a 50 coaxial cable.

!0 DC POWER JACK [DC 13.8V] (p. 8) Connects the supplied AC adapter for versions with an AC adapter. Connects to a 13.8 V DC power source using the supplied DC cable for versions without an AC adapter. Current of 1.5 A or greater is required. DO NOT use a cigarette lighter socket as a power source when operating in a vehicle. The plug may cause voltage drops and ignition noise may be superimposed onto received audio. q RECORDER REMOTE JACK [REC REMOTE]

Controls the running of a tape recorder for recording. Connects to the REMOTE jack on a tape recorder. This function can be turned OFF in set mode. (p. 32) w RECORDER JACK [REC]

Outputs receive audio signals. Connects to the AUX or LINE IN jack on a tape recorder. e RS-232C CONNECTOR [RS-232C]

Connects an RS-232C cable. An RS-232C cable can be used to connect the receiver to a PC. In this way commands can be sent to the receiver via the PC. r CI-V REMOTE CONTROL JACK [REMOTE]

Allows connection to an Icom CI-V system transceiver or another receiver for the transceive function. Also connects to a PC with several receivers for command control via an optional CT-17 CI-V LEVEL CONVERTER. t EXTERNAL SPEAKER JACK [EXT SP]

Connects an 8 external speaker, if desired. When an external speaker is connected, the internal speaker does not function. y MUTE CONTROL JACK [MUTE]

Mutes audio outputs and attenuates the receive signal input when grounded. Used for CI-V transceive operation with a transceiver. 6 INSTALLATION AND CONNECTIONS 3 Grounding To prevent accidents involving electricity and interference from transceivers, ground the receiver through the [GND] terminal on the rear panel. For best results, connect a heavy gauge wire or strap to a long earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as possible. Optional bracket and carrying handle D Mounting bracket An optional IC-MB5 MOBILE MOUNTING BRACKET is available to install the radio under a table, on a wall, in a vehicle, etc. Select an area to mount the receiver keeping in mind that the weight of the receiver is approx. 3 kg. R WARNING: NEVER connect the [GND]

terminal to a gas or electric pipe, since the connec-

tion could cause an explosion or electric shock. Flat washer Receiver stand The base of the receiver has an adjustable stand for desktop use. Set the stand to one of two angles depending on your operating conditions. D Carrying handle An optional handle allows you to easily carry and transport the receiver. Attach the MB-23 CARRYING HANDLE with the supplied rubber feet as shown. 7 3 INSTALLATION AND CONNECTIONS Connections HEADPHONES COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS AF RF/SQL TWIN PBT PHONES POWER ANT SET CLOCK 1 2ABC 3DEF 4z 5JKL 6MNO 7PRS

. 8TUV 9WXY 0z ENT V/M MW CLR SEL SCAN DN UP P.AMP ATT NR ANF NB AGC LOCK REMOTE (p. 9, 32) Used for computer control and transceive. ANTENNA 2 Connect a long wire antenna; impedance: 500 . ANTENNA 1 (p. 9) Connect a Yagi antenna;

impedance: 50 . MUTE CONTROL JACK (p. 6) RECORDER/

RECORDER CONTROL (p. 9) RS-232C JACK (p. 10) EXTERNAL SPEAKER (p. 39) GROUND (p. 7) DC13.8V JACK PC SP-21 AD-55/A/S/V*

or OPC-869

* The AD-55, AD-55A, AD-55S and AD-55V have different shapes. 8 INSTALLATION AND CONNECTIONS 3 Antenna connection Antennas play a very important role in receiver operation. Connecting a poor quality antenna to the receiver will result in less than optimum performance. PL-259 CONNECTOR INSTALLATION EXAMPLE When using a 50 antenna, use [ANT 1] connector for connection. When using a 500 long wire antenna, use [ANT 2] terminal for connection. q w 30 mm Coupling ring 10 mm (soft solder) Slide the coupling ring down. Strip the cable jacket and soft solder. 10 mm Soft solder 12 mm Strip the cable as shown at left. Soft solder the center con-

ductor. e r solder solder Slide the connector body on and solder it. Screw the coupling ring onto connector body. the

(10 mm 38 in) Tape recorder connections The [REC OUT] jack has 350 mV rms/4.7 k output for connection to other audio equipment.

[REC REMOTE] jack: Grounds when a signal is received and squelch opens. If a tape recorder has a control terminal, this jack can be used for recording control. (1 A/DC max.) IC-R75

[AUX IN] or

[LINE IN] jack

[REC REMOTE]

[REC OUT]

350 mVrms 4.7 k Transceive function Icom CI-V transceivers or receivers can be connected via the [REMOTE] jack. The frequency and mode become the same* when either radio is changed. IC-R75

* When a set frequency is out-of-range for one of the connected transceivers or receivers, the connected radios frequency/mode does not change. Icom CI-V transceiver/receiver

[REMOTE]

Connect to [REMOTE] jack Be sure the CIV TRn item is turned ON in set mode (p. 32). 9 3 INSTALLATION AND CONNECTIONS FSK and AFSK (SSTV) connections To connect a terminal unit, TNC or scan converter, refer to the diagram below. q Connect a terminal unit as below. w Select RTTY mode (or USB, CW modes for HF band data communications). e Set the receiver to the desired frequency as at right. r Set the connected terminal unit to the appropriate settings. Refer to the terminal units instructions. The optional 250 Hz CW narrow filters may not pass RTTY signals. Be sure to select the appropriate IF filters corresponding to the signal width. (pgs. 18, 19) Frequency settings depend on the mode used. FM mode:

[Setting frequency (displayed freq.)] = [Desired freq.]

USB mode:

[Setting frequency (displayed freq.)] = [Desired freq.] [Center of Mark and Space freq.]

CW narrow mode:

[Setting frequency (displayed freq.)] = [Desired freq.] [Center of Mark and Space freq.] + [600 Hz]

LSB mode (for amateur RTTY):

[Setting frequency (displayed freq.)] = [Desired freq.] + [Mark freq.]

to [REC REMOTE]

to [REC]

AF IN 2-conductor 3.5(d) plugs TU or TNC SQUELCH IN PC Connecting to a PC The RS-R75 remote control software is available to perform data setting and remote control of the receiver. Refer to the diagram below for connection. D System requirements To use this program, the following hardware and software are required:

IBM PC compatible computer An RS-232C serial port Microsoft Windows 95 or Microsoft Windows 98 Intel i486DX4 processor or faster (Pentium 100 MHz or faster recommended) At least 16 MB RAM At least 10 MB of hard disk space At least 640 480 pixel, high color (16 bit) display Supplied RS-232C cable (OPC-743) 10 PC IC-R75 FREQUENCY SETTING 4 Therefore, when you want to keep a displayed frequency for later recall, you must program it into a memory channel by pushing [MW] for 2 sec. See p. 22 for details. Read me first The receiver uses memory channels for storage of frequencies (as well as mode, tuning steps, etc.). When turning power OFF or changing memory channels, the previously displayed frequency cannot be recalled unless it has been stored into a memory channel. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO BLANK appears above the memory channel readout until [MW] is pushed for 2 sec. Push [MW] for 2 sec. after tuning. Using the keypad q Push the numeral keys on the keypad to enter the MHz digits for the desired frequency. If a key is mistakenly pushed, push [CLR] and start again from the beginning. When entering the same MHz digits as the displayed frequency, this step can be skipped. w Push [] on the keypad.

[EXAMPLE]: Setting the frequency using the keypad. e Push the numeral keys to enter the frequency digits below 1 MHz. If a key is mistakenly pushed, push [CLR] and start again from the beginning. r Push [ENT] to set the input frequency. When pushing [ENT] after entering the MHz digits, zeros are automatically entered for the kHz digits. To set to 28.00 MHz 2ABC 8TUV ENT USB R X USB R X USB R X To set to 21.050 MHz 2ABC 1

. 0QZ 5JKL ENT USB R X USB R X USB R X USB R X To set to 850 kHz (0.850 MHz) 0QZ

. 8TUV 5JKL ENT USB R X USB R X USB R X USB R X To change 14.19075 to 14.850 MHz

. 8TUV 5JKL ENT USB R X USB R X USB USB R X R X USB R X 11 4 FREQUENCY SETTING Frequency setting Rotate the tuning dial to change the frequency. The frequency changes in increments determined by the selected tuning step (see below). When the lock function is activated (LOCK appears), the frequency cannot be changed via tuning dial. Push [TS] one or more times to select a quick tuning step. D Programmable tuning steps Programmable tuning steps are available to suit your operating requirements. These tuning steps are:

Independently selectable for each mode Selectable from 0.1, 1, 5, 6.25, 9, 10, 12.5, 20, 25, 100 kHz q Select the desired operating mode with [SSB],

[CW/RTTY], [AM] or [FM]. (p. 14) w P u s h [ T S ] o n e o r m o r e t i m e s u n t i l t h e programmable tuning step indicator, , appears above the 1 kHz. Rotating the tuning dial changes the frequency according to the set tuning step. e Push [TS] for 2 sec. while the programmable tuning step indicator appears to enter the tuning step set mode. r Rotate the tuning dial to set the desired tuning step for the selected mode. t Push [TS] to exit the tuning step set mode. y Rotate the tuning dial to change the frequency according to the set tuning step. D 1 Hz and 10 Hz tuning steps When both the 1 MHz tuning step and programmable tuning step, , disappear, rotating the tuning dial changes the frequency in increments of 1 or 10 Hz. q P u s h [ T S ] o n e o r m o r e t i m e s u n t i l t h e programmable tuning step indicator or 1 MHz tuning step indicator, , disappears. w Push [TS] for 2 sec. to toggle between the 1 and 10 Hz step settings. When the 1 Hz step is selected, the 1 Hz digit appears in the frequency indication; when the 10 Hz step is selected, the 1 Hz digit disappears from the frequency indication. 12

[TS]

USB R X Programmable tuning step indicator S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO 10 kHz tuning step is selected. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO TS Push for 2 sec. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO Rotating the tuning dial changes the frequency in 10 Hz steps. Rotating the tuning dial changes the frequency in 1 Hz steps. FREQUENCY SETTING 4 D 1 MHz quick tuning step The quick tuning step function allows you to change the frequency in 1 MHz steps when rotating the tuning dial. Push [TS] one or more times until the 1 MHz tuning step indicator, , appears above the 1 MHz indicator. Quick tuning step indicator USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO

[TS] SWITCH FLOW CHART 10 Hz tuning Programmable step tuning

(100 Hz 100 kHz) 1 MHz tuning USB R X USB R X USB R X 2 sec. momentarily 2 sec. momentarily 2 sec. momentarily USB R X 1 Hz tuning Selectable for each mode. Dial lock function The dial lock function prevents accidental changes caused by the tuning dial. The lock function electronically locks the dial. Push [LOCK] momentarily to toggle the lock function ON and OFF. LOCK appears in the function display while the lock function is activated. USB R X LOCK S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO LOCK appears while the lock function is activated.

[LOCK]

13 5 RECEIVE FUNCTIONS Mode selection The following modes are available in the IC-R75:

SSB (LSB/USB), CW, CW REV (CW reverse), FM, AM, RTTY and RTTY REV (RTTY reverse). Push [SSB] to toggle between LSB and USB. Push [CW/RTTY] momentarily to toggle between CW and RTTY. OPERATING MODE SELECTION CW/RTTY CW CW REV RTTY RTTY REV SSB Push [CW/RTTY] for 2 sec. to toggle between CW and CW reverse or RTTY and RTTY reverse. Push Push [AM] to select AM. Push [FM] to select FM. LSB AM FM momentarily Push momentarily USB AM FM The selected mode is indicated in the function display. Push mode switch for 2 sec. Push mode switch momentarily. Squelch and RF gain The receiver uses the same control, [RF/SQL], to adjust one of either the RF gain or the squelch.

[RF/SQL] adjusts either the RF gain or the squelch depending on the operating mode selected and the condition of the RF/SQL item in set mode (p. 30).

[RF/SQL] control priority Set mode setting Sq (SQL) USB, LSB, CW, RTTY SQL*

At (AUTO) RF GAIN AM, FM SQL*

SQL*

rS (RF/SQL) RF/SQL RF/SQL

* The RF gain is set to maximum level when the [RF/SQL]

is set as [SQL] control. The RF (Radio Frequency) gain is used to adjust the receiver gain. Shallow rotation moves the S-meter to the right indicating the signal strength which can be received. The recommended position for RF gain is the 12 oclock position since this sets RF gain to the max. The SQUELCH removes noise output from the speaker (closed condition) when no signal is received. The squelch is particularly effective for FM. It is also available for the other modes. When operating in FM, first rotate the control fully counterclockwise. Then, rotate the control clockwise to the point where the noise just disappears. This is the best position. The squelch does not open for weak signals when it is set too deep. A segment appears in the S-meter to indicate the S-meter squelch level. When set as the [RF/SQL] control Recommended level Squelch is open. RF gain adjustable range Noise squelch (FM mode) Maximum RF gain S-meter squelch When set as the [SQL] control Noise squelch threshold

(FM mode) Squelch is open. Noise squelch (FM mode) S-meter squelch threshold S-meter squelch Shallow Deep When set as the [RF] control Maximum RF gain Adjustable range Minimum RF gain 14 RECEIVE FUNCTIONS 5 Twin PBT operation T h e t w i n P B T ( Pa s s b a n d Tu n i n g ) f u n c t i o n electronically narrows the IF passband widths to reduce interference. Moving both [TWIN PBT]

controls to the same position shifts the IF. Variable range depends on the filter selection. 1.29 kHz in 15 Hz steps and 258 kHz in 3 Hz steps are available.

[TWIN PBT] should normally be set to the center positions when there is no interference. When PBT is used, the audio tone may be changed. PBT may not function with some IF filter combinations. Not available for FM mode. PBT OPERATION EXAMPLE Both controls at center position TWIN PBT Cutting a lower passband TWIN PBT Cutting both higher and lower passbands TWIN PBT Passband Passband IF center frequency Interference Desired signal Interference Interference Desired signal Noise blanker The noise blanker eliminates pulse-type noise such as from car ignitions. The noise blanker is not available for FM mode. Push the [NB] switch to turn the noise blanker ON or OFF. When using the noise blanker, received signals may be distorted if they are excessively strong. The noise blanker function in AM mode can be deactivated depending on set mode setting. (p. 31)

[NB]

15 5 RECEIVE FUNCTIONS Preamp The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn this function ON when receiving weak signals. Push [P.AMP] to toggle between preamp-1 and preamp-2 or turn the preamp OFF. Attenuator The attenuator prevents desired signals from distorting when very strong signals are near the desired frequency or when very strong electric fields, such as from broadcasting stations, are near your location. Push [ATT] toggle the 20 dB attenuator function ON and OFF. ATT appears when the attenuator is turned ON. AGC time constant The AGC (Automatic Gain Control) controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading, etc. Use AGC slow for normal phone operation; AGC fast for receiving data and searching for signals. Push [AGC] momentary to toggle the AGC time constant between fast and slow. F.AGC appears when the fast time constant is selected. AGC appears when the slow time constant is selected. Push [AGC] for 2 sec. to turn the AGC circuit OFF. AGC OFF appears when the AGC circuit is turned OFF. Push [AGC] to turn the AGC circuit ON. S-meter is deactivated when the AGC circuit is turned OFF. Antenna selection 2 types of antenna can be connected to this receiver. When 2 antennas are connected, select an antenna depending on the operating condition. Push [ANT(SET)] for 2 sec. to toggle between the antenna 1 and 2 connectors. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. 16 USB R X PREAMP 1 S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO PREAMP appears while the preamp is activated. USB R X S1 3 5 7 ATT 20 9 1 ANT 40 60dB AGC BLANK BLANK VFO ATT appears while the attenuator is activated. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC F. AGC VFO BLANK BLANK F.AGC appears when the fast time constant is selected. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO ANT1 appears when the

[ANT1] connector is in use. RECEIVE FUNCTIONS 5 Receive audio tone response CW reverse mode CW-R (CW Reverse) mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes. Use when interfering signals are near a desired signal and you want to change the interference tone. BFO 1/3 octave Push for 2 sec. CW/RTTY 1/2 octave BFO q Push [CW/RTTY] once or twice to select CW mode. w Push [CW/RTTY] for 2 sec. to toggle between CW and CW reverse (CW REV). Check the interfering tone. Desired signal

(600 Hz) Interference

(800 Hz) Desired signal

(600 Hz) Interference

(400 Hz) CW mode (USB side) CW REV mode (LSB side) CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating frequency. The received CW audio pitch can be adjusted in 10 Hz steps. q Push [(ANT) SET] momentarily to enter set mode. w Push [UP Y] or [Z DN] to select the CW PITCH item. e Rotate the tuning dial to set the desired CW audio pitch. CW audio pitch is displayed in 10 Hz steps. 60 indicates 600 Hz CW audio pitch. r Push [(ANT) SET] again to exit set mode. RTTY reverse mode Received characters are occasionally garbled when the receive signal is reversed between MARK and SPACE. This reversal can be caused by incorrect TNC connections, settings, commands, etc. To receive a reversed RTTY signal correctly, select RTTY reverse mode. Shows a 600 Hz CW audio pitch q Push [CW/RTTY] once or twice to select RTTY mode. w Push [CW/RTTY] for 2 sec. to toggle between RTTY and RTTY reverse (RTTY REV). Check the receive signal. 17 5 RECEIVE FUNCTIONS Filter selection The filter selection switches the IF passband width as shown in the table at right. The filter selection is automatically memorized in each mode. IF q Select the desired mode with the mode switches. w Push [FIL] one or more times to select the desired 9 MHz filter combination. or does not appear while in normal IF filter. appears when wide IF filters are selected. appears when narrow IF filters are selected. When an optional filter is installed, set the optional filter in filter set mode. Optional filters are not selected by default. 455 kHz Filter construction Passband Recommended Filter width selectivity FL-100 500 Hz/6 dB CW-N, RTTY-N FL-101 250 Hz/6 dB CW-N FL-103 2.8 kHz/6 dB SSB-W 1.9 kHz/6 dB SSB-N FL-223 FL-232 350 Hz/6 dB CW-N, RTTY-N FL-52A 500 Hz/6 dB CW-N, RTTY-N FL-53A 250 Hz/6 dB CW-N 2.8 kHz/6 dB SSB-W FL-96 FL-222 1.8 kHz/6 dB SSB-N 3.3 kHz/6 dB SSB-W FL-257 9 MHz IF filter 455 kHz IF filter FL-23 (15 kHz) Mixer CFWS450E (15 kHz) 2nd IF signal FL-272 (2.4 kHz) CFWS450HT (6 kHz) 3rd IF signal FL-103 (2.8 kHz) FL-223 (1.9 kHz) FL-100 (500 Hz) FL-232 (350 Hz) FL-101 (250 Hz) optional FL-65 (2.4 kHz) FL-257 (3.3 kHz) FL-96 (2.8 kHz) FL-222 (1.8 kHz) FL-52A (500 Hz) FL-53A (250 Hz) optional 18 Filter set mode When an optional filter is installed, set the optional filters in filter set mode. Optional filters are not selected by default. D Optional filter setting q Push [FIL] for 2 sec. to enter filter set mode. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. w Push [UP Y] or [Z DN] one or more times until oP1 appears for 9 MHz IF filter setting or oP2 appears for 455 kHz IF filter setting. e Rotate the tuning dial to select the installed filter. No, 100, 101, 103, 223 and 232 indicate no optional filter, FL-100, FL-101, FL-103, FL-223 and FL-232, respectively for 9 MHz IF filter selection. No, 52A, 53A, 96, 222 and 257 indicate no optional filter, FL-52A, FL-53A, FL-96, FL-222 and FL-257, respectively for 455 kHz IF filter selection. r Push [FIL] to exit filter set mode. D Wide/narrow filter setting q Push [FIL] for 2 sec. to enter filter set mode. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. w Select the desired mode with the mode switches. e Push [UP Y] or [Z DN] one or more times to select the desired width 9 MHz or 455 kHz IF filter. Wide or narrow mode can be deactivated when 9 MHz wide or narrow filter is set to OFF. 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow filter is set to OFF. r Rotate the tuning dial to select a filter. t Repeat steps w and r to select IF filters for other modes, if desired. The filter combinations are stored depending on operating modes. y Push [FIL] to exit filter set mode. D Expanded filter selection ON/OFF The selectable filter combinations can be expanded by setting the expanded filter selection to ON. q Push [FIL] for 2 sec. to enter filter set mode. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. w Push [UP Y] or [Z DN] one or more times until EXP appears. e Rotate the tuning dial to turn the expanded filter selection ON/OFF. If ON is selected, the expanded filter selection can be used. r Push [FIL] to exit filter set mode. RECEIVE FUNCTIONS 5 9 MHz normal filter selection USB 455 kHz normal filter selection USB 9 MHz narrow filter selection N USB 455 kHz narrow filter selection*

N USB 9 MHz wide filter selection W USB 455 kHz wide filter selection*

W USB Expanded filter selection ON/OFF USB 9 MHz normal filter selection USB 455 kHz normal filter selection USB

* 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow filter is set to OFF. 19 5 RECEIVE FUNCTIONS Optional noise reduction function When an optional UT-106 is installed (DSP appears in the function display), noise reduction function can be used. optional UT-106 Noise reduction OFF Noise reduction activated The noise reduction function reduces noise components and picks out desired signals which are buried in noise. The received AF signals are converted to digital signals and then the desired signals are separated from the noise. q Push [NR] to turn the noise reduction ON. w Push [NR] for 2 sec. to enter the noise reduction

[NR] indicator appears. level setting condition. Noise components Desired signal (CW) Noise reduction example Higher setting of the [NR] level results in audio signal masking or distortion. Set the [NR] level for maximum clarity. The noise reduction function is available in all modes, including AM and FM modes. e Rotate the tuning dial to adjust the noise reduction level. r Push [NR] to exit the setting condition. t Push [NR] again to turn the noise reduction OFF.

[NR] indicator disappears. Optional auto notch function When an optional UT-106 is installed (DSP appears in the function display), an auto notch function can be used. The function automatically attenuates more than 3 beat tones, tuning signals, etc., even if they are moving. The auto notch functions in SSB mode only. q Select SSB mode. w Push [ANF] to turn the auto notch function ON. e Push [ANF] again to cancel the function.

[ANF] indicator disappears.

[ANF] indicator appears. optional UT-106 Auto notch OFF Auto notch ON Desired signal (AF) Desired signal (AF) Unwanted tone frequency Particular frequency is attenuated 20 MEMORY OPERATION 6 Memory channels The receiver has 101 memory channels. The memory mode is very useful for quickly changing to often-used frequencies. All 101 memory channels are tuneable which means the programmed frequency can be tuned temporarily with the tuning dial, etc. in memory mode. MEMORY CHANNEL Regular memory channels Scan edge memory channels MEMORY CHANNEL NUMBER 199 P1, P2 CAPABILITY TRANSFER TO VFO OVER-

WRITING CLEAR One frequency and one mode in each memory channel. One frequency and one mode in each memory channel as scan edges for programmed scan. Yes Yes Yes Yes Yes No Memory channel selection D Using the [UP Y] or [Z DN] keys D Using the keypad q Push [V/M] to select memory mode. w Push [UP Y] or [Z DN] several times to select the MEMO appears. desired memory channel. Push and hold [UP Y] or [Z DN] for continuous q Push [V/M] to select memory mode. w Push the desired memory channel number using MEMO appears. the keypad. Enter 100 or 101 to select scan edge channel P1 or selection. e To return to VFO mode, push [V/M] again. P2, respectively. e Push [V/M] to select the desired memory channel. r To return to VFO mode, push [V/M] again. USB R X USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M V/M USB R X USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO UP or DN S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO 1 2ABC V/M USB R X USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO 21 6 MEMORY OPERATION Memory channel programming Memory channel programming can be preformed either in VFO mode or in memory mode. D Programming in VFO mode

[EXAMPLE]: Programming 7.088 MHz/LSB into memory channel 12. q Set the desired frequency and operating mode in VFO mode. w Push [UP Y] or [Z DN] several times to select the desired memory channel. BLANK appears if the selected memory channel is a blank channel (and does not have contents). e Push [MW] for 2 sec. to program the displayed frequency and operating mode into the memory channel. Preamp setting, attenuator on/off, antenna selection, and AGC setting can also be programmed into a memory channel. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO SSB or keypad LSB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO UP or DN LSB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC BLANK BLANK VFO MW Beep Beep Beep Push for 2 sec. D Programming in memory mode q Select the desired memory channel with [UP Y]

or [Z DN] in memory mode. BLANK appears if the selected memory channel is a blank channel (and does not have contents). w Set the desired frequency and operating mode in memory mode. To program a blank channel, use direct frequency entry with the keypad in advance. e Push [MW] for 2 sec. to program the displayed frequency and operating mode into the memory channel. Preamp setting, attenuator on/off, antenna selection, and AGC setting can also be programmed into a memory channel. LSB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO

[EXAMPLE]: Programming 21.280 MHz/CW into memory channel 18. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M then UP or DN S1 3 5 7 9 20 40 60dB BLANK BLANK MEMO keypad then CW/RTTY CW R X R X S1 3 5 7 9 20 ANT 1 40 60dB AGC BLANK BLANK MEMO MW Beep Beep Beep Push for 2 sec. 22 CW R X R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO MEMORY OPERATION 6 Frequency transferring The frequency and operating mode in a memory channel can be transferred to the VFO. Frequency transferring can be performed in either VFO mode or memory mode. D Transferring in VFO mode This is useful for transferring programmed contents to VFO. TRANSFERRING EXAMPLE IN VFO MODE Operating frequency Contents of M-ch 16

: 21.320 MHz/USB (VFO)

: 14.018 MHz/CW q Select VFO mode with [V/M]. w Select the memory channel to be transferred with

[UP Y] or [Z DN]. BLANK appears if the selected memory channel is a blank channel (and does not have contents). e Push [V/M] for 2 sec. to transfer the frequency and operating mode. Transferred frequency and operating mode appear on the frequency readout. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO UP or DN USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M Beep Beep Beep Push for 2 sec. CW R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO D Transferring in memory mode This is useful for transferring frequency and operating mode while operating in memory mode. TRANSFERRING EXAMPLE IN MEMORY MODE Operating frequency Contents of M-ch 16

: 14.020 MHz/CW (M-ch 16)

: 14.018 MHz/CW When you have changed the frequency or operating mode in the selected memory channel:

Displayed frequency and mode are transferred. Programmed frequency and mode in the memory channel are not transferred, and they remain in the memory channel. q Select the memory channel to be transferred with

[UP Y] or [Z DN] in memory mode. And, set the frequency or operating mode if required. w Push [V/M] for 2 sec. to transfer the frequency and operating mode. Displayed frequency and operating mode are transferred to the VFO. e To return to VFO mode, push [V/M] momentarily. CW R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO V/M Beep Beep Beep Push for 2 sec. CW R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO V/M CW R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M CW R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO Displayed memory channel contents are transferred. Memory channel contents remain in the memory channel. 23 6 MEMORY OPERATION Memory names All memory channels (including scan edges) can be tagged with alphanumeric names of up to 8 characters each. Letters (capitals except o), numerals and spaces can be used. Numerals can only be used for the 7th and 8th digits. D Turning memory name indication ON/

OFF q Select memory mode with [V/M]. w Push [SEL] for 2 sec. to turn memory name indication ON. Frequency disappears and a memory name appears if programmed. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO Non-named channel e Push [SEL] for 2 sec. to turn memory name indication OFF. While the memory name indication is selected, pushing [TS] shows the operating frequency; and rotating the tuning dial while pushing [TS]

changes the frequency temporally. D Editing (programming) memory names q Select memory mode with [V/M]. w Push [SEL] for 2 sec. to turn memory name indication ON. e Select the memory channel to program with [UP Y] or [Z DN]. BLANK appears if the selected memory channel is a blank channel (and does not have contents). Memory clearing Any unnecessary memory channels can be cleared. The cleared memory channels become blank channels. q Select memory mode with [V/M]. w Select the memory channel to be cleared with

[UP Y] or [Z DN]. e Push [CLR] for 2 sec. to clear the contents. The programmed frequency and operating mode disappear. BLANK appears. r To clear other memory channels, repeat steps w and e. 24 r Push [ENT] to edit memory channel name. A cursor appears and blinks. Memory channel names of blank channels cannot be edited. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO t Input the desired character by pushing a key on the keypad one or more times.

[1] inputs numeral 1.

[2] inputs numeral 2 and letters A to C.

[3] inputs numeral 3 and letters D to F.

[4] inputs numeral 4 and letters G to I.

[5] inputs numeral 5 and letters J to L.

[6] inputs numeral 6 and letters M to O.

[7] inputs numeral 7 and letters P, R and S.

[8] inputs numeral 8 and letters T to V.

[9] inputs numeral 9 and letters W to Y.

[0] inputs numeral 0 and letters Q and Z. Rotate tuning dial for cursor movement. Numerals can only be used for the 7th and 8th digits. Push [] to delete the selected character and input a space. y Push [ENT] to input the set the name. The cursor disappears. Push [CLR] to abandon the settings and return to USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO previous memory name. u Repeat steps e to y to program another memory channels name, if desired. i Push [SEL] for 2 sec. to turn memory name indication OFF. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO CLR Beep Beep Beep Push for 2 sec. S1 3 5 7 9 20 40 60dB BLANK BLANK MEMO SCANS 7 Scan types PROGRAMMED SCAN/AUTO MEMORY WRITE SCAN Repeatedly scans between two scan edge frequencies

(scan edge memory channels P1 and P2). Auto memory write scan automatically memorizes paused frequencies into memory channels 80 to 99. Scan edge P1 or P2 Scan edge P2 or P1 Scan Jump This scan operates in VFO mode. MEMORY SCAN Repeatedly scans all programmed memory channels. S (select) BLANK Mch 2 Mch 3 Mch 4 Mch 1 S (select) S (select) Mch 5 Mch 99 Mch 7 Mch 6 S (select) S (select) This scan operates in memory mode. SELECT MEMORY SCAN Repeatedly scans all select memory channels. PRIORITY WATCH Repeatedly watches a memory channel. S (select) BLANK Mch 2 Mch 3 Mch 4 Mch 1 S (select) S (select) Mch 5 Mch 99 Mch 7 Mch 6 S (select) S (select) This scan operates in memory mode.

Preparation Channels For programmed scan/auto memory write scan:

Program scan edge frequencies into scan edge memory channels P1 and P2. For memory scan:

Program 2 or more memory channels except scan edge memory channels. For select memory scan:

Designate 2 or more memory channels as select memory channels. To designate the channel as a select memory channel, select a memory channel, then push [SEL] in the scan screen (memory mode) or in the memory channel screen. For priority watch:

Program 1 or more memory channels. Scan resume ON/OFF You can select the scan to resume or cancel when detecting a signal, in set mode. Scan resume ON/OFF must be set before operating a scan. See p. 31 for ON/

OFF setting and scan resume condition details. Scan speed Scan speed can be selected from 2 levels, high or low, in set mode. See p. 31 for details. 5 sec. VFO frequency 125 msec. Memory channel This scan operates in VFO mode. Squelch condition Scan starts with squelch open For programmed scan:

When tuning step is 1 kHz or less:

The scan continues until it is stopped manually it does not pause* even if signals are detected.

* The scan is paused when the squelch is closed and then opened (scan resumes after 10 sec. has passed when the scan resume is ON; scan is cancelled when the scan resume is OFF). When tuning step is more than 5 kHz:

The scan pauses on each step when the scan resume is ON; not applicable when the scan resume is OFF. For memory scan:

Scan pauses on each channel when the scan resume is ON; not applicable when the scan resume is OFF. Scan starts with squelch closed Scan stops when a signal is detected. If the scan resume is set to ON in scan set mode, the scan pauses for 10 sec. when detecting a signal, then resumes. When a signal disappears while scan is paused, scan resumes 2 sec. later. 25 7 SCANS Programmed scan operation q Select VFO mode with [V/M]. w Select the desired operating mode. The operating mode can also be changed while scanning. e Set [RF/SQL] open or closed. See previous page for scan condition. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. r Push [SCAN] to start the programmed scan. SCAN appears while scanning. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO SCAN t When the scan detects a signal, the scan stops, pauses or ignores it depending on the resume setting and the squelch condition. y To cancel the scan, push [SCAN]. If the same frequencies are programmed into the s c a n e d g e m e m o r y c h a n n e l P 1 a n d P 2 , programmed scan does not start. Memory/select memory scan operation q Select memory mode with [V/M]. w Select the desired operating mode. The operating mode can also be changed while scanning. e Set [RF/SQL] open or closed. See previous page for scan condition. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. r Push [SCAN] to start the memory/select memory scan. SCAN appears while scanning. t Push [SEL] to toggle between memory scan and select memory scan. y When the scan detects a signal, the scan stops, pauses or ignores it depending on the resume setting and the squelch condition. u To cancel the scan, push [SCAN]. 2 or more memory channels must be programmed for memory scan to start. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC SCAN MEMO S Setting select memory channels q Select memory mode with [V/M]. w Select the desired memory channel to set as select memory channel. e Push [SEL] to set the memory channel as a select memory or not. S appears for select memory channels. r Repeat steps w to e to program another memory channel as a select memory channel, if desired. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO S S appears for the select channel. 26 SCANS 7 y When a signal is received on a watch channel, the function display shows the watch channel and SCAN blinks. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC SCAN MEMO u To cancel the watch, push [SCAN]. r Push [SCAN] to start the programmed scan. SCAN appears while scanning. If the same frequencies are programmed into the scan edge memory channel P1 and P2, programmed scan does not start. t Push [MW] to start the auto memory write scan. 80 blinks when auto memory write scan starts. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC BLANK BLANK VFO SCAN y When the scan detects a signal, the frequency is programmed into a memory channel (80 to 99), starting from channel 80. u To cancel the scan, push [SCAN]. Priority watch operation Priority watch checks for signals on a frequency every 5 sec. while operating on a VFO frequency. q Select memory mode with [V/M]. w Select the desired memor y channel to be watched with [UP Y] or [Z DN]. e Select VFO mode. r Set [RF/SQL] closed. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. t Push [SCAN] for 2 sec. to start priority watch. SCAN appears. USB S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO SCAN Auto memory write scan Auto memory write scan operates in the same way as programmed scan. However, when a signal is received, the received frequency is automatically written into memory channels (80 to 99). When the auto memory write scan starts, the previously written memory channels (80 to 99) are cleared. 80 81 82 83 84 98 99 14.456.00 14.567.00 14.678.00 14.890.00 14.050.00

--------------

--------------

q Select VFO mode with [V/M]. w Select the desired operating mode. The operating mode can also be changed while scanning. e Set [RF/SQL] closed. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. 27 8 CLOCK AND TIMERS Setting the current time The receiver has a built-in 24-hour clock with power-

off and power-on timer functions. This is useful when logging SWLs, BCLs and so on. q Push [CLOCK] to select clock indication mode. Current time and CL appear. w Push [(ANT) SET] for 2 sec. to enter time setting condition. Current time flashes. e Set the current time using the tuning dial; or push keypad using 4-digit 24 hour system. r Push [ENT] to set the time. t Push [CLOCK] to exit clock indication mode. Push [CLR] to cancel the setting. Setting power-on time The receiver can be set to turn ON automatically at a specified time. q Push [CLOCK] to select clock indication mode. w Push [UP Y] to select power-on timer screen. Power-on time and on appear. r Set the desired time using the tuning dial; or push keypad using 4-digit 24 hour system. t Push [ENT] to set the time. Power-on timer is automatically turned ON. Push [CLR] to cancel the setting. TIMER e Push [(ANT) SET] for 2 sec. to enter time setting condition. Power-on time flashes. Push [(ANT) SET] momentarily when the power-on timer is already turned ON. y Push [(ANT) SET] momentarily to toggle the power-on timer ON and OFF, if necessary. o and X indicates the power-on timer is turned ON and OFF, respectively. u Push [ENT] to exit clock indication mode. i Push [POWER] for 2 sec. to turn the power OFF. When the set time arrives, the power is automatically turned ON. 28 CLOCK AND TIMERS 8 Setting power-off time The receiver can be set to turn OFF automatically at a specified time. q Push [CLOCK] to select clock indication mode. w Push [UP Y] or [Z DN] twice to select power-off timer screen. Power-off time and oF appear. r Set the desired time using the tuning dial; or push keypad using 4-digit 24 hour system. t Push [ENT] to set the time. Power-off timer is automatically turned ON. Push [CLR] to cancel the setting. TIMER e Push [(ANT) SET] for 2 sec. to enter time setting condition. Power-off time flashes. Push [(ANT) SET] momentarily when the power-off timer is already turned ON. y Push [(ANT) SET] momentarily to toggle the power-off timer ON and OFF, if necessary. o and X indicates the power-off timer is turned ON and OFF, respectively. u Push [ENT] to exit clock indication mode. When the set time arrives, the power is automatically turned OFF with 5 beeps. Setting sleep timer period The receiver can be set to turn OFF automatically. The power-off period can be set from 1 min. to 23 hours 59 min. q Push [CLOCK] to select clock indication mode. w Push [Z DN] to select sleep timer screen. Sleep timer period and SL appear. r Set the desired periods using the tuning dial; or push keypad using 4-digit 24 hour system. t Push [ENT] to set the periods. Sleep timer is automatically turned ON. Push [CLR] to cancel the setting. TIMER e Push [(ANT) SET] for 2 sec. to enter time setting condition. Sleep timer period flashes. y Push [(ANT) SET] momentarily to toggle the sleep timer ON or OFF, if necessary. o and X indicates the sleep timer is turned ON and OFF, respectively. u Push [ENT] to exit clock indication mode. i The receiver emits 5 beeps and turns OFF after the sleep timer period elapses. 29 9 SET MODE Set mode description Set mode is used for programming infrequently changed values or conditions of functions. D Set mode operation q Push [(ANT) SET] to enter the set mode. w Push [UP Y] or [Z DN] to select the desired item. e Set the desired condition using the tuning dial. r Push [(ANT) SET] to exit the set mode. RF/squelch control The [RF/SQL] control can be set as the squelch control (default; RF gain is fixed at maximum), the RF gain control only (squelch is fixed as open) or RF/squelch control. See p. 14 for details. Confirmation beep A beep sounds each time a switch is pushed to confirm it. This function can be turned OFF for silent operation. The volume level can be set in the next item. Beep level This item adjusts the volume level for confirmation beep tones from 0% to 100% in 1% steps. The volume level is displayed in 10% steps. 5 indicates 50% volume level. Beep level limit This item limits the maximum volume level for confirmation beep tones. S-meter peak hold The peak level of the S-meter can be displayed for 0.5 sec. to confirm it easily. 30 Scan resume This item sets the scan resume function ON or OFF. on scan resumes 10 sec. after stopping on a signal (or 2 sec. after a signal disappears) oF scan does not resume after stopping on a signal. See p. 25 for scanning details. Scan speed The receiver has 2 speeds for scanning, high and low. See p. 25 for scanning details. AM mode noise blanker The noise blanker for AM mode can be turned ON and OFF. CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating frequency. The CW audio pitch can be adjusted in 10 Hz steps. The CW audio pitch is displayed in 10 Hz steps. 60 indicates 600 Hz CW audio pitch. Blank channel indication This item sets the blank channel indication ON or OFF. on blank memory channels are skipped and can not be selected. oF all memory channels can be selected. SET MODE 9 31 9 SET MODE Recorder remote This item sets the [REC REMOTE] jack function ON or OFF. CI-V address To distinguish equipment, each CI-V transceiver or receiver has its own Icom standard address in hexadecimal code. The IC-R75s address is 5Ah. When 2 or more IC-R75s are connected to an optional CT-17 CI-V LEVEL CONVERTER, rotate the tuning dial to select a different address for each IC-R75 in the range 01h to 7Fh. CI-V baud rate This item sets the data transfer rate. 3 (300 bps), 12 (1200 bps), 48 (4800 bps), 96 (9600 bps), HI (19200 bps) and At (automatic) are available. When At is selected, the baud rate is automatically set according to the connected controller or remote controller. CI-V transceive Transceive operation is possible with the IC-R75 connected to other Icom HF transceivers or receivers. When on is selected, changing the frequency, operating mode, etc. on the IC-R75 automatically changes those of connected transceivers (or receivers) and vice versa. CI-V with IC-735 When connecting the IC-R75 to the IC-735 for transceive operation, you must change the operating frequency data length to 4 bytes. This item must be set to ON only when operating receiver with the IC-735. Speech language When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can select between English and Japanese as the language. En English announcement JP Japanese announcement See p. 34 for unit installation. 32 Speech speed When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can select between faster or slower synthesizer output. See p. 34 for unit installation. Speech S-level When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can have signal level, frequency, mode and current time announcement. Signal level announcement can be deactivated if desired. See p. 34 for unit installation. Speech current time When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can have signal level, frequency, mode and current time announcement. Current time announcement can be deactivated if desired. See p. 34 for unit installation. RTTY mark frequency This item selects the RTTY mark frequency. RTTY mark frequency is toggled between 1275, 1615 and 2125 Hz. RTTY shift width This item adjusts the RTTY shift width. There are 3 selectable values: 170, 200 and 425 Hz. LCD backlight This item adjusts the brightness of the LCD from 0

% to 100 % in 1 % steps. The brightness is displayed in 10% steps. 5 indicates 50% brightness. Auto tuning step This item sets the auto tuning speed. The tuning dial normally changes the frequency 2.5 kHz/revolution in 10 Hz tuning step. When auto tuning speed is turned on this increases to 50 kHz/revolution in 50 Hz tuning step during quick rotation of the dial. SET MODE 9 33 10 OPTION INSTALLATIONS e Remove the 2 screws from the bottom of the receiver, slide the cover backward, then remove the bottom cover. Opening the receivers case Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust an internal unit, etc. CAUTION: DISCONNECT the DC power cable from the receiver before performing any work on the receiver. Otherwise, there is danger of electric shock and/or equipment damage. q Remove the 2 screws from the left side of the receiver to remove an optional carrying handle, if necessary. w Remove the 4 screws from the top of the receiver and 4 screws from the sides, then lift up the top cover. CR-282 high stability crystal unit By installing the CR-282, the total frequency stability of the receiver will be improved. e Remove the supplied internal crystal and replace with the CR-282. q Remove the top cover as shown in the diagram above. w Remove 5 screws from the PLL unit, disconnect P1 from J491 (MAIN unit), then remove the PLL unit. PLL unit r Adjust the reference frequency at L2 using a frequency counter. t Return the PLL unit and top cover to their original positions. CR-282 Internal crystal L2 PLL unit Connect a frequency counter here and adjust the frequency to 60.00000 MHz. MAIN unit UT-102 voice synthesizer unit The UT-102 announces the received frequency, mode, S-meter level and current time in a clear, electronically-

generated voice, in English (or Japanese). Push [LOCK] for 2 sec. to announce the frequency, etc. q Remove the top cover as shown above. w Remove the protective paper attached to the bottom of the UT-102 to expose the adhesive strip. e Plug UT-102 into J1271 on the MAIN unit as shown at right. r Return the top cover to its original position. 34 UT-106 dsp unit The UT-106 provides AF DSP functions such as noise reduction and auto notch. q Remove the top and bottom covers. w Remove the shielding plate. e Remove the connection cable (P1241) from J1221 on the MAIN unit. Connect the cable into J1 on the UT-106. r Plug the connection cable (P1) from the UT-106 to J1221 on the MAIN unit. t Plug the flat cable into J3 on the UT-106 and to J1231 on the MAIN unit. Take care of the conductor direction. y Attach the Velcro tape as shown at right. Attach the UT-106 to the reverse side of the MAIN unit. u Return the shielding plate, top cover and bottom cover to their original positions. Optional IF filters Several IF filters are available for the IC-R75. You can install 1 filter for both 9 MHz and 455 kHz IF. Choose appropriate filter for your operating needs. 9 MHz optional filters:

FL-101 cw narrow filter FL-232 rtty/cw narrow filter FL-100 cw narrow filter FL-223 ssb narrow filter FL-103 ssb wide filter 455 kHz optional filters:

FL-53A cw narrow filter FL-52A cw/rtty narrow filter FL-222 ssb narrow filter FL-96 ssb wide filter FL-257 ssb wide filter 250 Hz/6 dB 350 Hz/6 dB 500 Hz/6 dB 1.9 kHz/6 dB 2.8 kHz/6 dB 250 Hz/6 dB 500 Hz/6 dB 1.8 kHz/6 dB 2.8 kHz/6 dB 3.3 kHz/6 dB 9 MHz filter OPTION INSTALLATIONS 10 UT-106 P1241 J3 P1241 J1231 J1221 D Installation q Remove the top cover as shown on the opposite page. w Install the desired 9 MHz filter as shown in the diagram below. The filters can be installed in either direction. e Install the desired 455 kHz filter as shown in the diagram below. r Replace the top cover. After filter installation, specify the installed filter using filter set mode. (p. 19) Otherwise, the installed filter will not function properly. 455 kHz filter 35 11 MAINTENANCE Troubleshooting The following chart is designed to help you correct problems which are equipment malfunctions. If you are not able to locate the cause of a problem or solve it through the use of this chart, contact your nearest Icom Dealer or Service Center. PROBLEM POSSIBLE CAUSE SOLUTION R E W O P I E V E C E R N A C S Y A L P S D I Power does not come on when the [POWER] switch is pushed. DC power cable is improperly connected. Fuse is blown. No sound comes from the speaker. Volume level is too low. The squelch is closed. Sensitivity is low. The antenna is not connected properly. The antenna for another band is selected. Receive audio is distorted. The attenuator is activated. The operating mode is not selected correctly. PBT function is activated. Noise blanker function is activated. Preamp is activated. The optional noise reduction is activated and the [NR] level is set too high. Reconnect the DC power cable correctly. Check for the cause, then replace the fuse with a spare one.

(Fuses are installed in the DC power cable and the internal MAIN unit.) Rotate [AF] clockwise to obtain a suitable listening level. Rotate [RF/SQL] to 12 oclock position to open the squelch. Reconnect to the antenna connector. Select an antenna suitable for the operating frequency. Push [ATT] to turn the function OFF. Select a suitable operating mode. Set [TWIN PBT] to the center position. Push [NB] to turn the function OFF. Push [P.AMP] once or twice to turn the function OFF. Push [NR] to turn the function OFF. Programmed scan does not stop. Squelch is open.

[RF/SQL] is assigned to RF gain control and squelch is open. Set [RF/SQL] to the threshold point. Reset [RF/SQL] control assignment and set it to the threshold point. Programmed scan does not start. The same frequencies have been programmed in scan edge memory channels P1 and P2. Program different frequencies in scan edge memory channels P1 and P2. Memory scan does not start. 2 or more memory channels have not been programmed. Program 2 or more memory channels. Select memory scan does not start. 2 or more memory channels have not been designated as select channels. Designate 2 or more memory channels as select channels for the scan. F.AGC flashes in the function display. A scan or band scope function is activated via an optional RS-R75 remote control software. If these functions are not in use, push [AGC] to deactivate the function. The displayed frequency does not change properly. The dial lock function is activated. The internal CPU has malfunctioned. Push [LOCK] to deactivate the function. Reset the CPU. REF. p. 37 p. 2 p. 14 p. 16 p. 16 p. 14 p. 15 p. 15 p. 16 p. 20 p. 14 pgs. 14, 30 p. 22 p. 22 p. 26 p. 13 See below. Resetting the CPU Resetting CLEARS all programmed contents in memory channels and returns programmed values in set mode to their defaults. When first applying power or when the function seems to be displaying erroneous information, reset the CPU as follows:

q Make sure receiver power is OFF. w While pushing [UP Y] and [Z DN], push [POWER]

to turn power ON. The internal CPU is reset. The receiver displays its initial VFO frequencies when resetting is complete.

[POWER]

[ZDN]

[UPY]

36 MAINTENANCE 11 DC POWER CABLE FUSE REPLACEMENT 3 A fuse FGB 3 A Fuse replacement If a fuse blows or the receiver stops functioning, try to find the source of the problem, and replace the damaged fuse with a new, rated fuse. CAUTION: DISCONNECT the DC power cable from the receiver when changing a fuse. The IC-R75 has 2 types of fuses installed for receiver protection. DC power cable fuses Circuitry fuse FGB 3 A FGB 3 A CIRCUITRY FUSE REPLACEMENT The 13.8 V DC from the DC power cable is applied to all units in the IC-R75 through the circuitry fuse. This fuse is installed in the MAIN unit. q Remove the top cover as shown on p. 34 w Replace the circuitry fuse as shown in the diagram at right. e Replace the top cover. Clock backup battery replacement The receiver has a lithium backup battery (CR2032) inside for clock and timer functions. The usual life of the backup battery is approximately 2 years. When the backup battery is exhausted, the receiver receives normally but cannot retain the current time. CR2032 e r w q 37 12 SPECIFICATIONS D General Frequency coverage

: 0.0360.000000 MHz*

* 0.0329.999999 MHz only for Asia version; 0.03 29.999999 and 50.052.0 MHz for Denmark version;

specifications guaranteed 0.129.99 MHz and 5054 MHz only Mode

: USB, LSB, CW, RTTY, AM, FM Number of memory

: 101 (99 regular, 2 scan edges) channels Frequency stability

: Less than 7 ppm from 1 min. to 60 min. after power on. After that rate of stability less than 1 ppm/hr. at +25 C (+77F). Temperature fluctuations 0C to +50C

(+32F to +122F) less than 5 ppm. Power supply requirement

: 13.8 V DC 15%

(negative ground) Antenna connector Current drain

(at 13.8 V DC)

: Standby 0.9 A Max. audio 1.1 A

: SO-239 (50 ), push connection terminal (500 )

: 241(W)94(H)229(D) mm

(projections not included) 912(W)31116(H)9132(D) in Dimensions Weight (approx.)

: 3.0 kg; 6 lb 10 oz REMOTE connector

: RS-232C D-sub 9-pin CI-V connector

: 2-conductor 3.5 (d) mm (18) D Receiver Receive system

: Triple-conversion superheterodyne system Intermediate frequencies:

1st (MHz) 2nd (MHz) 3rd (kHz) Mode USB*/LSB* 69.0115 69.0106 CW*

69.0105 RTTY*

69.0100 AM*

FM 69.0115 9.0115 9.0106 9.0105 9.0100 9.0115 455 455.9 456 450 450

* Frequencies differ according to the selected IF filter. SSB/CW/RTTY 10 dB S/N

:

Sensitivity Frequency range 0.11.8 MHz*1 2.0 V 1.828 MHz*2 0.16 V 2829.99 MHz*2 0.16 V 5054 MHz*3 0.13 V AM FM 10 dB S/N 12 dB SINAD 5.6 V 1.6 V 1.6 V 1.0 V 0.22 V 0.2 V

*1 Preamp: OFF; *2 Preamp 1: ON; *3 Preamp 2: ON Squelch sensitivity (threshold):

*1 Preamp 1: ON; *2 Preamp 2: ON SSB, CW, RTTY Less than 5.6 V*1 Less than 0.32 V*2 FM Selectivity

:

AM SSB, CW, RTTY More than 2.1 kHz/6 dB Less than 4.0 kHz/60 dB More than 6 kHz/6 dB Less than 20 kHz/50 dB More than 12 kHz/6 dB Less than 30 kHz/40 dB FM Spurious and image rejection ratio:

More than 70 dB

(except IF through/50 MHz band) Audio output power

(at 13.8 V DC)

: More than 2.0 W at 10%

distortion with an 8 load PHONES connector

: 3-conductor 6.35 (d) mm

(14) External SP connector : 2-conductor 3.5 (d) mm

(18)/8 All stated specifications are typical and subject to change without notice or obligation. 38 OPTIONS 13 FL-100, FL-101, FL-103, FL-223 and FL-232 9 MHz FILTERS FL-52A, FL-53A, FL-96, FL-222 and FL-257 455 kHz FILTERS FL-100: 500 Hz/6 dB (CW/RTTY nar.) FL-101: 250 Hz/6 dB (CW nar.) FL-103: 2.8 kHz/6 dB (SSB wide) FL-223: 1.9 kHz/6 dB (SSB nar.) FL-232: 350 Hz/6 dB (RTTY/CW nar.) FL-52A: 500 Hz/6 dB (CW/RTTY nar.) FL-53A: 250 Hz/6 dB (CW nar.) FL-96: 2.8 kHz/6 dB (SSB wide) FL-222: 1.8 kHz/6 dB (SSB nar.) FL-257: 3.3 kHz/6 dB (SSB wide) MB-23 CARRYING HANDLE IC-MB5 MOBILE MOUNTING BRACKET Carrying handle, convenient for portable operation. Receiver mounting bracket for mobile operation. CT-17 CI-V LEVEL CONVERTER SP-21 EXTERNAL SPEAKER For remote receiver control using a PC. You can change frequencies, operating mode, memory channels, etc. Designed for base station operation. Input impedance: 8 Max. input power: 5 W CR-282 HIGH-STABILITY CRYSTAL UNIT Contains a temperature-compensating oven heater and crystal unit for improved frequency stability. Frequency stability: 0.5 ppm UT-102 VOICE SYNTHESIZER UNIT Announces the receive frequency, mode, S-meter level and current time in a clear, electronically-generated voice, in English (or Japanese). RS-R75 REMOTE CONTROL SOFTWARE Allows you to control the receiver from your PC (for Microsoft Windows 95 or Windows 98).

* S-AM (Synchronous AM) mode appears and can be selected on the control screen, however, the receiver will function in normal AM mode only. UT-106 DSP UNIT Provides AF DSP functions such as noise reduction and auto notch. Approved Icom optional equipment is designed for optimal performance when used with an Icom receiver. Icom is not responsible for the destruction or damage to an Icom receiver in the event the Icom receiver is used with equipment that is not manufactured or approved by Icom. 39 14 CONTROL COMMAND Remote jack (CI-V) information CI-V connection example The receiver can be connected through an optional CT-17 CI-V LEVEL CONVERTER to a PC equipped with an RS-232C port. The Icom Communications Interface-V

(CI-V) controls the following functions of the receiver. Up to 4 Icom CI-V transceivers or receivers can be connected to a PC equipped with an RS-232C port. See p. 32 for setting the CI-V condition using set mode. Data format The CI-V system can be operated using the following data formats. Data formats differ according to command numbers. A data area or sub command is added for some commands. IC-R75 915 V DC ct-17 PC mini-plug cable CONTROLLER TO IC-R75 OK MESSAGE TO CONTROLLER q w e r t y FE FE 5A E0 Cn Sc Data area r e b m u n d n a m m o C

) t h g i r t a e b a l t e e s

(

) d e x i f

(

e d o c l e b m a e r P s s e r d d a t l f u a e d s r e v e c e R i s s e r d d a t l u a f e d s r e l l o r t n o C r e b m u n d n a m m o c

) t h g i r t a l e b a t e e s

(

b u S y r t n e r e b m u n y r o m e m r o y c n e u q e r f r o f t a a d e d o c D C B IC-R75 TO CONTROLLER q w e r t y FE FE E0 5A Cn Sc Data area r e b m u n

) t h g i r t a l e b a t e e s

(

d n a m m o c b u S r e b m u n

) t h g i r t a d n a m m o C l e b a t e e s

(

) d e x i f

(

e d o c l e b m a e r P s s e r d d a t l u a e d f s r e l l o r t n o C s s e r d d a t l u a f e d s r e v e c e R i 40 y r t n e r e b m u n y r o m e m r o y c n e u q e r f r o f a t a d e d o c D C B u FD

) d e x i f

(

e d o c e g a s s e m f o d n E u FD

) d e x i f

(

e d o c e g a s s e m f o d n E FE FE E0 5A FB FD

) d e x i f

(

e d o c l e b m a e r P s s e r d d a t l u a f e d s r e l l o r t n o C s s e r d d a t l f u a e d s r e v e c e R i

) d e x i f

(

e d o c K O

) d e x i f

(

e d o c e g a s s e m f o d n E NG MESSAGE TO CONTROLLER FE FE E0 5A FA FD

) d e x i f

(

l e d o c e b m a e r P s s e r d d a t l u a f e d s r e l l o r t n o C

) d e x i f

(

e d o c G N s s e r d d a t l u a f e d s r e v e c e R i

) d e x i f

(

e d o c e g a s s e m f o d n E Command table Command Sub command 00 01 02 03 04 05 06 07 08 09 0A 0B 0E 10 Same as command 06 Same as command 06 00*1 01*1 02*1 03*1 04*1 05*1 07*1 08*1 0001 0101*2 00 01 02 04 22 23 B0 B1 D0 D3 00 01 02 03 04 05 06 07 08 09 10 11 Description Send frequency data Send mode data Read band edge frequencies Read operating frequency Read operating mode

*1Add 00, 01 or 02 for selecting wide, normal or narrow filter, respectively. Set frequency data Set LSB Set USB Set AM Set CW Set RTTY Set FM Set CW-R Set RTTY-R Select VFO mode Select memory mode Select memory channel

*2P1=0100, P2=0101 Memory write Memory to VFO Memory clear Scan stop Programmed/memory scan start Programmed scan start Auto memory write scan start Memory scan start Select memory scan start Set as non-select channel Set as select channel Set scan resume OFF Set scan resume ON 10 Hz (1 Hz) tuning step 100 Hz tuning step 1 kHz tuning step 5 kHz tuning step 6.25 kHz tuning step 9 kHz tuning step 10 kHz tuning step 12.5 kHz tuning step 20 kHz tuning step 25 kHz tuning step 100 kHz tuning step 1 MHz tuning step CONTROL COMMAND 14 Command Sub command Description 11 12 13 00 20 00 01 00 01 02 01 + level data 02 + level data 03 + level data 06 + level data 14 07 + level data 08 + level data 09 + level data 15 16 18 19 1A 01 02 02 12 22 40 41 00 01 00 00 + data 01 + data 02 + data Attenuator OFF Attenuator ON Select [ANT1]

Select [ANT2]

Announce with voice synthesizer

(00=all data; 01=frequency and S-meter level; 02=receive mode)

[AF] level setting (0000=max. CCW to 0255=max. CW)

[RF] level setting (0000=max. CCW to 0255=11 oclock)

[SQL] level setting (0000=11 oclock to 0255=max. CW)

[NR] level setting (0000=min. to 0255=max.) Inside [TWIN PBT] setting

(0000=max. CCW, 0128=center, 0255=max. CW) Outside [TWIN PBT] setting

(0000=max. CCW, 0128=center, 0255=max. CW)

[CW PITCH] setting (0000=low pitch to 0255=high pitch) Read squelch condition Read S-meter level Set preamp (00=OFF;

01=preamp 1; 02=preamp 2) Set AGC time constant (00=OFF;

01=S-fast; 02=fast; 03=slow) Set noise blanker (00=OFF; 01=ON) Set optional noise reduction

(00=OFF; 01=ON) Set optional auto notch

(00=OFF; 01=ON) Turn the receiver power ON Turn the receiver power OFF Read the receiver ID Send/read memory contents

(See example 1 on p. 42) Send/read IF filter setting

(See example 2 on p. 42) Send/read set mode contents

(See example 3 on p. 43) 41 14 CONTROL COMMAND CI-V data example 1 Reading/sending memory contents:

q Memory channel w Select memory ch select ch e Receive frequency 12.345678 MHz r Receive mode t IF filter FM Narrow 39 y Attenuator u Preamp i Antenna selection ANT1 o Memory name NOTE: When reading data, w o are not required. OFF Preamp 1 DXSPOT 1 q w e r t y F E F E 5 A E 0 1 A 0 0 0 0 3 9 0 1 7 8 5 6 3 4 1 2 0 0 0 5 0 3 0 0 0 1 0 0 4 4 85 D X F4 5 3 5 0 S 3 1 P O T Space 1 45 2 0 u F D q w e r t y u i o z H 0 1 z H 1 z H k 1 z H 0 0 1 z H k 0 0 1 z H k 0 1 z H M 0 1 z H M 1 z H G 1 z H M 0 0 1 q r Data Mode LSB 00 USB 01 AM 02 CW 03 04 RTTY Data Mode FM 05 07 08 11 CW-R RTTY-R S-AM Data Mch 1 ch 0001 99 ch 0099 0100 0101 w Data 00 01 P1 P2 SEL OFF ON o Memory name uses ASCII codes Space = 20h Numerals = 30h39h, Alphabetical = 41h5Ah

(except 7th and 8th digits) Non-named channel = FFh t Data IF filter Wide 01 Normal 02 Narrow 03 u Data P.AMP OFF 00 01 02 1 2 y i Data ATT OFF 00 ON 20 Data ANT 00 01 1 2 CI-V data example 2 Reading/sending IF filter setting:

q Receive mode w 9 MHz filter e 455 kHz filter 2.4 kHz LSB/USB Normal Narrow OFF Wide Normal Narrow Wide 15 kHz 6 kHz 2.4 kHz 15 kHz NOTE: When reading data, w and e are not required. q w e r t y Normal Narrow Wide u F E F E 5 A E 0 1 A 0 1 0 0 0 2 0 1 0 7 0 4 0 0 0 0 F D q Data 00 01 02 03 05 Mode LSB/USB CW/CW-R RTTY/RTTY-R AM FM q w e w e w e w Data 00 01 02 03 04 05 06 07 9 MHz filter 15 kHz (built-in) 2.8 kHz (FL-103) 2.4 kHz (built-in) 1.9 kHz (FL-223) 500 Hz (FL-100) 350 Hz (FL-232) 250 Hz (FL-101) OFF e Data 00 01 02 03 04 05 06 07 455 kHz filter 15 kHz (built-in) 6 kHz (built-in) 3.3 kHz (FL-257) 2.8 kHz (FL-96) 2.4 kHz (built-in) 1.8 kHz (FL-222) 500 Hz (FL-52A) 250 Hz (FL-53A) 42 CI-V data example 3 Reading/sending set mode contents:

q Set mode number w Set data 21 (backlighting) Set backlighting to a little on the brighter side (180) NOTE: When reading data, w is not required. CONTROL COMMAND 14 q w e r t y u F E F E 5 A E 0 1 A 0 2 2 1 0 1 8 0 F D q w w changes depending on the set mode contents. Refer to the 'Type' in the table below. Type 1 Type 2 Type 3 0 1 0 1 8 0 hr. min. sec. 1 5 5 0 0 0 Type 4 hr. min. 1 4 3 0 Set mode data table Set mode No (q) Set mode item 01 02 03 04 05 06 07 08 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 RF/squelch control Confirmation beep Beep level Beep level limit S-meter peak hold Scan resume Scan speed AM mode noise blanker CW pitch control Blank channel indication Recorder remote CI-V transceive CI-V with IC-735 Speech language Speech speed Speech S-level Speech current time RTTY mark frequency RTTY shift width LCD backlight Auto tuning step Expanded filter selection 9 MHz optional IF filter 455 kHz optional IF filter Memory name indication Set current time Power-on timer Set power-on time Power-off timer Set power-off time Sleep timer Set sleep time Selectable value Squech/Auto/RF gain + squelch OFF/ON 0 100%

OFF/ON OFF/ON OFF/ON Low/high OFF/ON 300 Hz 900 Hz OFF/ON OFF/ON OFF/ON OFF/ON English/Japanese Slower/Faster OFF/ON OFF/ON 1275 Hz/1615 Hz/2125 Hz 170 Hz/200 Hz/425 Hz 0 100%

OFF/ON OFF/ON None/FL-100/FL-101/FL-103/FL-223/FL-232 None/FL-52A/FL-53A/FL-96/FL-222/FL-257 Frequency indication/Memory name indication 0:00:00 23:59:59 OFF/ON 0:00 23:59 OFF/ON 0:00 23:59 OFF/ON 0:01 23:59 Data range (w) Data type (w) 00/01/02 00/01 0000 0255 00/01 00/01 00/01 00/01 00/01 0300 0900 00/01 00/01 00/01 00/01 00/01 00/01 00/01 00/01 00/01/02 00/01/02 0000 0255 00/01 00/01 00/01/02/03/04/05 00/01/02/03/04/05 00/01 000000 235959 00/01 0000 2359 00/01 0000 2359 00/01 0001 2359 1 1 2 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 3 1 4 1 4 1 4 43 A-5580H-1EX-t Printed in Japan 19992009 Icom Inc. Printed on recycled paper with soy ink. 1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan

 

 

INSTRUCTION MANUAL COMMUNICATIONS RECEIVERiR75 IMPORTANT EXPLICIT DEFINITIONS READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the re-

ceiver. SAVE THIS INSTRUCTION MANUAL. This manual contains important safety and operating in-

structions for the IC-R75. PRECAUTIONS RNEVER apply AC to the [DC13.8V] jack on the re-

ceiver rear panel. This could cause a re or ruin the re-

ceiver. RNEVER apply more than 16 V DC, such as a 24 V battery, to the [DC13.8V] jack on the receiver rear panel. This could cause a re or ruin the receiver. RNEVER let metal, wire or other objects touch any internal part or connectors on the rear panel of the re-

ceiver. This may result in an electric shock. NEVER expose the receiver to rain, snow or any liq-

uids. AVOID using or placing the receiver in areas with tem-

peratures below 10C (+14F) or above +60C

(+140F). Be aware that temperatures on a vehicles dashboard can exceed 80C (+176F), resulting in per-

manent damage to the receiver if left there for ex-

tended periods. SUPPLIED ACCESSORIES The receiver comes with the following accessories. Qty. q AC adapter (AD-55/A/V)* ..................................... 1 w DC power cable (OPC-869)* ............................... 1 e Fuse (FGB 3 A; internal use) ............................... 1 r Fuse (FGB 3 A; for DC cable)* ............................ 2

* Either AC adapter + 1 fuse (q, e) or DC power cable + 3 fuses (w, e, r) are supplied depending on versions. Versions of the IC-R75 which display the CE symbol on the serial number seal comply with the European har-

monised standard ETS300 684 (EMC product standard for Commercially Available Amateur Radio Equipment). i WORD R WARNING CAUTION NOTE DEFINITION Personal injury, fire hazard or electric shock may occur. Equipment damage may occur. If disregarded, inconvenience only. No risk of personal injury, fire or electric shock. AVOID placing the receiver in excessively dusty envi-

ronments or in direct sunlight. AVOID placing the receiver against walls or putting anything on top of the receiver. This will obstruct heat dissipation. Place unit in a secure place to avoid inadvertent use by chil-

dren. During mobile operation, DO NOT operate the receiver without running the vehicles engine. When receiver power is ON and your vehicles engine is OFF, the ve-

hicles battery will soon become exhausted. Make sure the receiver power is OFF before starting the vehicle. This will avoid possible damage to the re-

ceiver by ignition voltage spikes. q w e r IMPORTANT .............................................................. i EXPLICIT DEFINITIONS ........................................... i PRECAUTIONS ......................................................... i SUPPLIED ACCESSORIES ...................................... i 1 TABLE OF CONTENTS ....................................... 1 2 PANEL DESCRIPTION ................................... 2 6 n Front panel ........................................................ 2 n Function display ................................................. 5 n Rear panel ......................................................... 6 3 INSTALLATION AND CONNECTIONS ......... 7 10 n Grounding .......................................................... 7 n Receiver stand ................................................... 7 n Optional bracket and carrying handle ................ 7 n Connections ...................................................... 8 n Antenna connection ........................................... 9 n Tape recorder connections ................................ 9 n Transceive function ............................................ 9 n FSK and AFSK (SSTV) connections ............... 10 n Connecting to a PC ......................................... 10 4 FREQUENCY SETTING .............................. 11 13 n Read me rst ................................................... 11 n Using the keypad ............................................. 11 n Frequency setting ............................................ 12 n Dial lock function ............................................. 13 5 RECEIVE FUNCTIONS ............................... 14 20 n Mode selection ................................................ 14 n Squelch and RF gain ....................................... 14 n Twin PBT operation ......................................... 15 n Noise blanker ................................................... 15 n Preamp ............................................................ 16 n Attenuator ........................................................ 16 n AGC time constant .......................................... 16 n Antenna selection ............................................ 16 n CW reverse mode ............................................ 17 n CW pitch control .............................................. 17 n RTTY reverse mode ........................................ 17 n Filter selection ................................................. 18 n Filter set mode ................................................. 19 n Optional noise reduction function .................... 20 n Optional auto notch function ............................ 20 TABLE OF CONTENTS 1 6 MEMORY OPERATION ............................... 21 24 n Memory channels ............................................ 21 n Memory channel selection ............................... 21 n Memory channel programming ........................ 22 n Frequency transferring .................................... 23 n Memory names ................................................ 24 n Memory clearing .............................................. 24 7 SCANS ........................................................ 25 27 n Scan types ....................................................... 25 n Preparation ...................................................... 25 n Programmed scan operation ........................... 26 n Memory/select memory scan operation .......... 26 n Setting select memory channels ..................... 26 n Priority watch operation ................................... 27 n Auto memory write scan operation .................. 27 8 CLOCK AND TIMERS ................................. 28 29 n Setting the current time ................................... 28 n Setting power-on time ...................................... 28 n Setting power-off time ...................................... 29 n Setting sleep timer period ................................ 29 9 SET MODE .................................................. 30 33 n Set mode description ....................................... 30 10 OPTION INSTALLATIONS ....................... 34 35 n Opening the receivers case ............................ 34 n CR-282 HIGH STABILITY CRYSTAL UNIT .......... 34 n UT-102 VOICE SYNTHESIZER UNIT .................. 34 n UT-106 DSP UNIT ............................................. 35 n Optional IF lters ............................................. 35 11 MAINTENANCE ........................................ 36 37 n Troubleshooting ............................................... 36 n Resetting the CPU ........................................... 36 n Fuse replacement ............................................ 37 n Clock backup battery replacement .................. 37 12 SPECIFICATIONS ........................................... 38 13 OPTIONS ......................................................... 39 14 CONTROL COMMAND ............................ 40 43 n Remote jack (CI-V) information ....................... 40 1 2 PANEL DESCRIPTION n Front panel Speaker Function display (p. 5)

!8

!6!7

!5 COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS q w AF RF/SQL TWIN PBT PHONES POWER ANT SET CLOCK 1 2ABC 3DEF 4GHI 5JKL 6MNO 7PRS

. 8TUV 9WXY 0QZ ENT V/M MW CLR SEL SCAN DN UP

!4

!3

!2 P.AMP ATT NR ANF NB AGC LOCK e r t y u i o

!0 !1 q POWER SWITCH [POWER]

Push momentarily to turn power ON. Turn the optional DC power supply ON in advance.

Push for 2 sec. to turn power OFF. w HEADPHONE JACK [PHONES] (p. 8) Accepts headphones. When headphones are connected, the internal speaker or connected external speaker does not function. e AF CONTROL [AF] (inner control) Varies the audio output level from the speaker. r RF GAIN/SQUELCH CONTROL [RF/SQL]

(outer control; pgs. 14, 30) Adjusts the squelch threshold level. The squelch re-

moves noise output from the speaker (closed con-

dition) when no signal is received. The squelch is particularly effective for FM. It is also available for other modes. The control can be set as the squelch plus RF gain con-

trols or squelch control only (RF gain is fixed at maxi-

mum) in set mode. t PASSBAND TUNING CONTROLS [TWIN PBT]

(p. 15) Adjust the receivers passband width of the 455 kHz and 9 kHz IF lters for the inner and outer con-

trols, respectively. Set to the center positions when not in use. y CLOCK MODE SWITCH [CLOCK] (p. 28) Toggles between frequency indication and clock in-

dication when pushed. u ANTENNA SELECTOR/SET MODE SWITCH

[ANT/SET] (pgs. 16, 30)

While in a frequency indication, enters set mode when pushed.

While in a frequency indication, toggles between the antenna 1 and 2 connectors when pushed for 2 sec.

While in the clock indication, enters time setting condition when pushed for 2 sec.

While in a timer indication, toggles the timer ON or OFF when pushed. i TUNING DIAL Changes the displayed frequency, selects set mode items, etc. o TUNING DIAL TENSION LATCH Adjusts the tension of the tuning dial.

!0 LOCK/SPEECH SWITCH [LOCK] (pgs. 13, 34)

Toggles the frequency lock function ON and OFF.

Announces the selected readout frequency when an optional UT-102 is installed and when pushed for 2 sec. 2 PANEL DESCRIPTION 2

!1 MEMORY CHANNEL UP/DOWN SWITCHES

!7 FILTER SWITCH [FIL] (pgs. 18, 19)

[DN]/[UP ] (p. 21)

Select a memory channel.

Select a set mode contents while in set mode.

Select a timer or time indication while in clock in-

Push momentarily to toggle between the pre-pro-

grammed normal, wide and narrow IF filters for the selected operating mode.

Push for 2 sec. to enter lter set mode. dication.

Select a lter set mode contents while in lter set

!8 MODE SWITCHES [SSB]/[CW/RTTY]/[AM]/[FM]

(p. 14) Select an operating mode. Push [SSB] to toggle between LSB and USB. Push [CW/RTTY] to toggle between CW and RTTY. Push [CW/RTTY] for 2 sec. to toggle between CW and CW reverse or RTTY and RTTY reverse. Push [AM] to toggle between AM and S-AM. Push [FM] to select FM. mode.

!2 MEMORY WRITE SWITCH [MW] (pgs. 22, 27)

Stores the displayed frequency and operating mode into the selected memory channel when pushed for 2 sec.

Toggles the programmed scan and auto memory write scan when pushed.

!3 CLEAR SWITCH [CLR] (p. 24)

Clears the input digits while inputting a frequency or memory channel number.

Clears the selected memory channel contents when pushed for 2 sec. in memory mode. This switch does not function in VFO mode.

!4 VFO/MEMORY SWITCH [V/M] (pgs. 21, 23)

Toggles the operating mode between VFO mode and memory mode when pushed.

Selects a memory channel for inputting a mem-

ory channel number when pushed.

Transfers the memory contents to VFO when pushed for 2 sec.

!5 KEYPAD (pgs. 11, 21) The keypad can be used for several functions as below:

Keypad then [ENT]

Direct frequency input. Keypad then [V/M]

Memory channel selection.

[ENT] then keypad in memory name indication mode Alphanumeric input for memory name, etc.

!6 QUICK TUNING STEP SWITCH [TS] (pgs. 12, 13)

Selects a quick tuning step or turns the quick tun-

ing step OFF. While the quick tuning indicator (6) is displayed, the frequency can be changed in kHz or MHz steps.

While the quick tuning step is OFF, turns the 1 Hz step ON and OFF when pushed for 2 sec. 1 Hz indication appears and the frequency can be changed in 1 Hz steps.

While the kHz quick tuning step is selected, en-

ters tuning step set mode when pushed for 2 sec.

While the memory name indication is selected in memory mode, pushing this switch shows the op-

erating frequency; and rotating the tuning dial while pushing this switch changes the frequency temporally. 3 2 PANEL DESCRIPTION n Front panel (continued) Function display (p. 5) COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS AF RF/SQL TWIN PBT PHONES POWER ANT SET CLOCK 1 2ABC 3DEF 4GHI 5JKL 6MNO 7PRS

. 8TUV 9WXY 0QZ ENT V/M MW CLR SEL SCAN DN UP

@6

@5 P.AMP ATT NR ANF NB AGC LOCK

!9 @0 @1 @2 @3 @4

!9 PREAMP SWITCH [P.AMP] (p. 16)

@4 AGC SWITCH [AGC] (p. 16) Push to toggle between preamp-1 and preamp-2 or turn the preamp OFF.

@0 ATTENUATOR SWITCH [ATT] (p. 16) Push to toggle the 20 dB attenuator function ON and OFF.

Toggles the AGC (Automatic Gain Control) time constant fast and slow when pushed.

Toggles the AGC function ON and OFF when pushed for 2 sec.

@5 SELECT SWITCH [SEL] (pgs. 24, 26)

Toggles the select memory setting ON and OFF

@1 NOISE REDUCTION SWITCH [NR] (p. 20) when pushed in memory mode.

Toggles the optional noise reduction function ON and OFF when pushed. Functions in SSB, CW and RTTY modes. An optional UT-106 DSP UNIT is required.

Enters noise reduction level set mode when pushed for 2 sec. An optional UT-106 DSP UNIT is required.

Toggles the memory name indication ON and OFF when pushed for 2 sec. in memory mode.

@6 SCAN SWITCH [SCAN] (p. 25)

Push momentarily to start/stop the programmed scan in VFO mode.

Push momentarily to start/stop the memory scan in memory mode.

@2 AUTOMATIC NOTCH FILTER SWITCH [ANF]

Push for 2 sec. to start the priority watch in VFO mode. Push [SCAN] again to cancel the priority watch.

(p. 20) Push to turn the optional automatic notch lter for receiving AM signals ON and OFF. An optional UT-106 DSP UNIT is required.

@3 NOISE BLANKER SWITCH [NB] (p. 15) Toggles the noise blanker ON and OFF. The noise blanker reduces pulse-type noise such as that gen-

erated by automobile ignition systems. This function is not effective for FM, or non pulse-type noise. 4 PANEL DESCRIPTION 2 n Function display q w e r t y TIMER DSP ANF NR LOCK S1

@1

@0

!9

!8 NW REV LSBUSBCW S-AMFM RTTY R X PREAMP 7 5 3 1 2 ATT 20 9 1 ANT 2 40 60dB BLANK BLANK F.AGC OFF N B VFO MEMO SCAN S u i o !0 !1 !2 !3 !4

!7

!6

!5 q TIMER INDICATOR (p. 28)

!2 AGC INDICATORS (p. 16) Appears when power on/off timer or sleep timer is in use. w DSP UNIT INDICATOR (p. 35) Appears when an optional UT-106 DSP UNIT is in-

stalled. e AUTOMATIC NOTCH FILTER INDICATOR (p. 20) Appears when the optional automatic notch lter is in use. r NOISE REDUCTION INDICATOR (p. 20) Appears when the optional noise reduction function is in use. t LOCK INDICATOR (p. 13) Appears when the dial lock function is in use. y SIGNAL METER

Shows the relative receive signal strength.

Shows the S-meter squelch level when used. u PREAMP INDICATOR (p. 16) Appears when antenna preamp-1 or preamp-2 is in use. i ATTENUATOR INDICATOR (p. 16) Appears when the attenuator function is in use. o ANTENNA INDICATORS (p. 16) Indicate which antenna connector is in use. AGC appears when slow AGC time constant is selected. F.AGC appears when fast AGC time constant is selected. AGC OFF appears when the AGC function is turned OFF. F.AGC blinks while scanning or while using band scope via an optional RS-R75.

!3 MEMORY MODE INDICATOR (p. 21) Indicates memory mode is selected.

!4 VFO MODE INDICATOR Indicates VFO mode is selected.

!5 MEMORY CHANNEL NUMBER READOUT

(p. 21)

Shows the selected memory channel number. S appears when the displayed memory channel is designated as a select memory channel.

!6 BLANK MEMORY INDICATOR Shows that the displayed memory channel is not programmed. This indicator appears both in VFO and memory modes.

!7 FREQUENCY READOUT Shows the operating frequency.

!8 RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open.

!9 MODE INDICATORS (p. 14) Indicate the selected operating mode.

!0 NOISE BLANKER INDICATOR (p. 15) Appears when the noise blanker function is in use.

@0 REVERSE MODE INDICATOR (p. 17) Indicates a reverse operating mode is selected.

!1 SCAN INDICATOR (p. 25)

Appears when scan or priority watch is activated.

Flashes when scan or priority watch is paused.

@1 WIDE/NARROW FILTER INDICATORS (p. 18)

appears when the wide IF lter is selected.

appears when the narrow IF lter is selected. 5

2 PANEL DESCRIPTION n Rear panel q w e r t y u i o !0 u GROUND TERMINAL [GND] (p. 7) Connects the black terminal to ground. i ANTENNA 2 TERMINAL [ANT 2] (p. 9) Connects the red terminal to a 500 long wire an-

tenna. o ANTENNA 1 CONNECTOR [ANT 1] (p. 9) Connects a 50 antenna with a PL-259 connector and a 50 coaxial cable.

!0 DC POWER JACK [DC 13.8V] (p. 8)

Connects the supplied AC adapter for versions with an AC adapter.

Connects to a 13.8 V DC power source using the supplied DC cable for versions without an AC adapter. Current of 1.5 A or greater is required. DO NOT use a cigarette lighter socket as a power source when operating in a vehicle. The plug may cause voltage drops and ignition noise may be superimposed onto received audio. q RECORDER REMOTE JACK [REC REMOTE]

Controls the running of a tape recorder for record-

ing. Connects to the REMOTE jack on a tape recorder. This function can be turned OFF in set mode. (p. 32) w RECORDER JACK [REC]

Outputs receive audio signals. Connects to the AUX or LINE IN jack on a tape recorder. e RS-232C CONNECTOR [RS-232C]

Connects an RS-232C cable. An RS-232C cable can be used to connect the receiver to a PC. In this way commands can be sent to the receiver via the PC. r CI-V REMOTE CONTROL JACK [REMOTE]

Allows connection to an Icom CI-V system trans-

ceiver or another receiver for the transceive func-

tion. Also connects to a PC with several receivers for command control via an optional CT-17 CI-V LEVEL CONVERTER. t EXTERNAL SPEAKER JACK [EXT SP]

Connects an 8 external speaker, if desired. When an external speaker is connected, the internal speaker does not function. y MUTE CONTROL JACK [MUTE]

Mutes audio outputs and attenuates the receive sig-

nal input when grounded. Used for CI-V transceive operation with a transceiver. 6 INSTALLATION AND CONNECTIONS 3 n Grounding To prevent accidents involving electricity and interfer-

ence from transceivers, ground the receiver through the [GND] terminal on the rear panel. For best results, connect a heavy gauge wire or strap to a long earth-sunk copper rod. Make the distance be-

tween the [GND] terminal and ground as short as pos-

sible. R WARNING: NEVER connect the [GND]

terminal to a gas or electric pipe, since the connec-

tion could cause an explosion or electric shock. n Optional bracket and carrying handle D Mounting bracket An optional IC-MB5 MOBILE MOUNTING BRACKET is avail-

able to install the radio under a table, on a wall, in a vehicle, etc. Select an area to mount the receiver keeping in mind that the weight of the receiver is approx. 3 kg. Flat washer n Receiver stand The base of the receiver has an adjustable stand for desktop use. Set the stand to one of two angles de-

pending on your operating conditions. D Carrying handle An optional handle allows you to easily carry and transport the receiver. Attach the MB-23 CARRYING HANDLE with the supplied rubber feet as shown. 7 3 INSTALLATION AND CONNECTIONS n Connections HEADPHONES COMMUNICATIONS RECEIVER SSB CW/RTTY FIL AM FM TS AF RF/SQL TWIN PBT PHONES POWER ANT SET CLOCK 1 2ABC 3DEF 4z 5JKL 6MNO 7PRS

. 8TUV 9WXY 0z ENT V/M MW CLR SEL SCAN DN UP P.AMP ATT NR ANF NB AGC LOCK REMOTE (p. 9, 32) Used for computer control and transceive. ANTENNA 2 Connect a long wire antenna; impedance: 500 . ANTENNA 1 (p. 9) Connect a Yagi antenna;

impedance: 50 . MUTE CONTROL JACK (p. 6) RECORDER/

RECORDER CONTROL (p. 9) RS-232C JACK (p. 10) EXTERNAL SPEAKER (p. 39) GROUND (p. 7) DC13.8V JACK SP-21 AD-55/A/V or OPC-869 8 INSTALLATION AND CONNECTIONS 3 n Antenna connection Antennas play a very important role in receiver opera-

tion. Connecting a poor quality antenna to the receiver will result in less than optimum performance. PL-259 CONNECTOR INSTALLATION EXAMPLE When using a 50 antenna, use [ANT1] connector for connection. When using a 500 long wire antenna, use [ANT 2] terminal for connection. q w 30 mm Coupling ring 10 mm (soft solder) Slide the coupling ring down. Strip the cable jacket and soft solder. 10 mm Soft solder 12 mm Strip the cable as shown at left. Soft solder the center con-

ductor. e r solder solder Slide the connector body on and solder it. Screw the coupling ring onto connector body. the

(10 mm 38 in) n Tape recorder connections The [REC OUT] jack has 350 mV rms/4.7 k output for connection to other audio equipment.

[REC REMOTE] jack: Grounds when a signal is received and squelch opens. If a tape recorder has a control terminal, this jack can be used for recording control. (1 A/DC max.) IC-R75

[AUX IN] or

[LINE IN] jack

[REC REMOTE]

[REC OUT]

350 mVrms 4.7 k n Transceive function Icom CI-V transceivers or receivers can be connected via the [REMOTE] jack. The frequency and mode be-

come the same* when either radio is changed. IC-R75

* When a set frequency is out-of-range for one of the con-

nected transceivers or receivers, the connected radios fre-

quency/mode does not change. Icom CI-V transceiver/receiver

[REMOTE]

Connect to [REMOTE] jack Be sure the CIV TRn item is turned ON in set mode (p. 32). 9 3 INSTALLATION AND CONNECTIONS n FSK and AFSK (SSTV) connections To connect a terminal unit, TNC or scan converter, refer to the diagram below. q Connect a terminal unit as below. w Select RTTY mode (or USB, CW modes for HF band data communications). e Set the receiver to the desired frequency as at right. r Set the connected terminal unit to the appropriate settings. Refer to the terminal units instructions. The optional 250 Hz CW narrow filters may not pass RTTY signals. Be sure to select the appropri-

ate IF filters corresponding to the signal width.

(pgs. 18, 19) Frequency settings depend on the mode used. FM mode:

[Setting frequency (displayed freq.)] = [Desired freq.]

USB mode:

[Setting frequency (displayed freq.)] = [Desired freq.] [Center of Mark and Space freq.]

CW narrow mode:

[Setting frequency (displayed freq.)] = [Desired freq.] [Center of Mark and Space freq.] + [600 Hz]

LSB mode (for amateur RTTY):

[Setting frequency (displayed freq.)] = [Desired freq.] + [Mark freq.]

to [REC REMOTE]

to [REC]

AF IN 2-conductor 3.5(d) plugs TU or TNC SQUELCH IN Personal computer n Connecting to a PC The RS-R75 remote control software is available to perform data setting and remote control of the re-

ceiver. Refer to the diagram below for connection. D System requirements To use this program, the following hardware and soft-

ware are required:

IBM PC compatible computer An RS-232C serial port Microsoft Windows 95 or Microsoft Windows 98 Intel i486DX4 processor or faster (Pentium 100 MHz or faster recommended) At least 16 MB RAM At least 10 MB of hard disk space At least 640 480 pixel, high color (16 bit) display Supplied RS-232C cable (OPC-743) 10 Personal computer IC-R75 FREQUENCY SETTING 4 Therefore, when you want to keep a displayed fre-

quency for later recall, you must program it into a memory channel by pushing [MW] for 2 sec. See p. 22 for details. n Read me rst The receiver uses memory channels for storage of fre-

quencies (as well as mode, tuning steps, etc.). When turning power OFF or changing memory channels, the previously displayed frequency cannot be recalled un-

less it has been stored into a memory channel. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO BLANK appears above the memory channel readout until [MW] is pushed for 2 sec. Push [MW] for 2 sec. after tuning. n Using the keypad q Push the numeral keys on the keypad to enter the MHz digits for the desired frequency. If a key is mistakenly pushed, push [CLR] and start again from the beginning. When entering the same MHz digits as the displayed frequency, this step can be skipped. w Push [] on the keypad.

[EXAMPLE]: Setting the frequency using the keypad. e Push the numeral keys to enter the frequency digits below 1 MHz. If a key is mistakenly pushed, push [CLR] and start again from the beginning. r Push [ENT] to set the input frequency. When pushing [ENT] after entering the MHz digits, zeros are automatically entered for the kHz digits. To set to 28.00 MHz 2ABC 8TUV ENT USB R X USB R X USB R X To set to 21.050 MHz 2ABC 1

. 0QZ 5JKL ENT USB R X USB R X USB R X USB R X To set to 850 kHz (0.850 MHz) 0QZ

. 8TUV 5JKL ENT USB R X USB R X USB R X USB R X To change 14.19075 to 14.850 MHz

. 8TUV 5JKL ENT USB R X USB R X USB USB R X R X USB R X 11 4 FREQUENCY SETTING n Frequency setting Rotate the tuning dial to change the frequency. The frequency changes in increments determined by the selected tuning step (see below). When the lock function is activated (LOCK appears), the frequency cannot be changed via tuning dial. Push [TS] one or more times to select a quick tuning step. D Programmable tuning steps Programmable tuning steps are available to suit your operating requirements. These tuning steps are:

Independently selectable for each mode Selectable from 0.1, 1, 5, 6.25, 9, 10, 12.5, 20, 25, 100 kHz q Select the desired operating mode with [SSB],

[CW/RTTY], [AM] or [FM]. (p. 14) w Push [TS] one or more times until the programma-

ble tuning step indicator, 6, appears above the 1 kHz. Rotating the tuning dial changes the frequency accord-

ing to the set tuning step. e Push [TS] for 2 sec. while the programmable tun-

ing step indicator appears to enter the tuning step set mode. r Rotate the tuning dial to set the desired tuning step for the selected mode. t Push [TS] to exit the tuning step set mode. y Rotate the tuning dial to change the frequency ac-

cording to the set tuning step. D 1 Hz and 10 Hz tuning steps When both the 1 MHz tuning step and programmable tuning step, 6, disappear, rotating the tuning dial changes the frequency in increments of 1 or 10 Hz. q Push [TS] one or more times until the programma-

ble tuning step indicator or 1 MHz tuning step in-

dicator, 6, disappears. w Push [TS] for 2 sec. to toggle between the 1 and 10 Hz step settings. When the 1 Hz step is selected, the 1 Hz digit appears in the frequency indication; when the 10 Hz step is se-

lected, the 1 Hz digit disappears from the frequency in-

dication. 12

[TS]

USB R X Programmable tuning step indicator S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO 10 kHz tuning step is selected. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO TS Push for 2 sec. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO Rotating the tuning dial changes the frequency in 10 Hz steps. Rotating the tuning dial changes the frequency in 1 Hz steps. FREQUENCY SETTING 4 D 1 MHz quick tuning step The quick tuning step function allows you to change the frequency in 1 MHz steps when rotating the tun-

ing dial. Push [TS] one or more times until the 1 MHz tuning step indicator, 6, appears above the 1 MHz indica-

tor. Quick tuning step indicator USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO

[TS] SWITCH FLOW CHART 10 Hz tuning Programmable step tuning

(100 Hz 100 kHz) 1 MHz tuning USB R X USB R X USB R X 2 sec. momentarily 2 sec. momentarily 2 sec. momentarily USB R X 1 Hz tuning Selectable for each mode. n Dial lock function The dial lock function prevents accidental changes caused by the tuning dial. The lock function electroni-

cally locks the dial. Push [LOCK] momentarily to toggle the lock function ON and OFF. LOCK appears in the function display while the lock func-

tion is activated. USB R X LOCK S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO LOCK appears while the lock function is activated.

[LOCK]

13 5 RECEIVE FUNCTIONS n Mode selection The following modes are available in the IC-R75:

SSB (LSB/USB), CW, CW REV (CW reverse), FM, AM, S-AM (Synchronous detection AM), RTTY and RTTY REV (RTTY reverse).

Push [SSB] to toggle between LSB and USB.

Push [CW/RTTY] momentarily to toggle between CW and RTTY.

Push [CW/RTTY] for 2 sec. to toggle between CW and CW reverse or RTTY and RTTY reverse.

Push [AM] to toggle between AM and S-AM. S- blinks when automatic mode selection between S-AM and AM modes is in use. This can be set in set mode. (p. 31)

Push [FM] to select FM. The selected mode is indicated in the function dis-

play. n Squelch and RF gain The receiver uses the same control, [RF/SQL], to ad-

just one of either the RF gain or the squelch.

[RF/SQL] adjusts either the RF gain or the squelch depending on the operating mode selected and the condition of the RF/SQL item in set mode (p. 30).

[RF/SQL] control priority Set mode setting Sq (SQL) USB, LSB, CW, RTTY SQL*

At (AUTO) RF GAIN AM, S-AM, FM SQL*

SQL*

rS (RF/SQL) RF/SQL RF/SQL

* The RF gain is set to maximum level when the [RF/SQL]

is set as [SQL] control. The RF (Radio Frequency) gain is used to adjust the receiver gain. Shallow rotation moves the S-meter to the right indicating the signal strength which can be received. The recommended position for RF gain is the 12 oclock position since this sets RF gain to the max. The SQUELCH removes noise output from the speaker (closed condition) when no signal is re-

ceived. The squelch is particularly effective for FM. It is also available for the other modes. When operating in FM, rst rotate the control fully counter-

clockwise. Then, rotate the control clockwise to the point where the noise just disappears. This is the best position. The squelch does not open for weak signals when it is set 14 OPERATING MODE SELECTION CW/RTTY CW CW REV RTTY RTTY REV SSB AM LSB AM FM Push momentarily USB S-AM FM Push mode switch for 2 sec. Push mode switch momentarily. too deep. A segment appears in the S-meter to indicate the S-meter squelch level. When set as the [RF/SQL] control Recommended level Squelch is open. RF gain adjustable range Noise squelch (FM mode) Maximum RF gain S-meter squelch When set as the [SQL] control Noise squelch threshold

(FM mode) Squelch is open. Noise squelch (FM mode) S-meter squelch threshold S-meter squelch Shallow Deep When set as the [RF] control Maximum RF gain Adjustable range Minimum RF gain RECEIVE FUNCTIONS 5 n Twin PBT operation The twin PBT (Passband Tuning) function electroni-

cally narrows the IF passband widths to reduce inter-

ference. Moving both [TWIN PBT] controls to the same position shifts the IF. Variable range depends on the lter selection. 1.29 kHz in 15 Hz steps and 258 kHz in 3 Hz steps are available.

[TWIN PBT] should normally be set to the center positions when there is no interference. When PBT is used, the audio tone may be changed. PBT may not function with some IF lter combina-

tions. Not available for FM mode. PBT OPERATION EXAMPLE Both controls at center position TWIN PBT Cutting a lower passband TWIN PBT Cutting both higher and lower passbands TWIN PBT Passband Passband IF center frequency Interference Desired signal Interference Interference Desired signal n Noise blanker The noise blanker eliminates pulse-type noise such as from car ignitions. The noise blanker is not avail-

able for FM mode.

Push the [NB] switch to turn the noise blanker ON or OFF. When using the noise blanker, received signals may be distorted if they are excessively strong. The noise blanker function in AM mode can be deactivated depending on set mode setting. (p. 31)

[NB]

15 5 RECEIVE FUNCTIONS n Preamp The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn this function ON when receiving weak signals.

Push [P.AMP] to toggle between preamp-1 and preamp-2 or turn the preamp OFF. n Attenuator The attenuator prevents desired signals from distort-

ing when very strong signals are near the desired fre-

quency or when very strong electric fields, such as from broadcasting stations, are near your location.

Push [ATT] toggle the 20 dB attenuator function ON and OFF. ATT appears when the attenuator is turned ON. n AGC time constant The AGC (Automatic Gain Control) controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading, etc. Use AGC slow for normal phone operation; AGC fast for receiving data and searching for signals.

Push [AGC] momentary to toggle the AGC time constant between fast and slow. F.AGC appears when the fast time constant is se-

lected. AGC appears when the slow time constant is se-

lected.

Push [AGC] for 2 sec. to turn the AGC circuit OFF. AGC OFF appears when the AGC circuit is turned OFF. Push [AGC] to turn the AGC circuit ON. n Antenna selection 2 types of antenna can be connected to this receiver. When 2 antennas are connected, select an antenna depending on the operating condition.

Push [ANT(SET)] for 2 sec. to toggle between the antenna 1 and 2 connectors. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. 16 USB R X PREAMP 1 S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO PREAMP appears while the preamp is activated. USB R X S1 3 5 7 ATT 20 9 1 ANT 40 60dB AGC BLANK BLANK VFO ATT appears while the attenuator is activated. USB R X S1 3 5 7 9 20 1 ANT 40 60dB F. AGC AGC VFO BLANK BLANK F.AGC appears when the fast time constant is selected. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC BLANK BLANK VFO ANT1 appears when the

[ANT1] connector is in use. RECEIVE FUNCTIONS 5 n CW reverse mode CW-R (CW Reverse) mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes. Receive audio tone response Use when interfering signals are near a desired signal and you want to change the interference tone. BFO 1/3 octave Push for 2 sec. CW/RTTY 1/2 octave BFO q Push [CW/RTTY] once or twice to select CW mode. w Push [CW/RTTY] for 2 sec. to toggle between CW and CW reverse (CW REV). Check the interfering tone. n CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating frequency. The received CW audio pitch can be adjusted in 10 Hz steps. q Push [(ANT)SET] momentarily to enter set mode. w Push [UP Y] or [Z DN] to select the CW PITCH item. e Rotate the tuning dial to set the desired CW audio pitch. CW audio pitch is displayed in 10 Hz steps. 60 indi-

cates 600 Hz CW audio pitch. r Push [(ANT)SET] again to exit set mode. n RTTY reverse mode Received characters are occasionally garbled when the receive signal is reversed between MARK and SPACE. This reversal can be caused by incorrect TNC connections, settings, commands, etc. To receive a reversed RTTY signal correctly, select RTTY reverse mode. Desired signal

(600 Hz) Interference

(800 Hz) Desired signal

(600 Hz) Interference

(400 Hz) CW mode (USB side) CW REV mode (LSB side) Shows a 600 Hz CW audio pitch q Push [CW/RTTY] once or twice to select RTTY mode. w Push [CW/RTTY] for 2 sec. to toggle between RTTY and RTTY reverse (RTTY REV). Check the receive signal. 17 5 RECEIVE FUNCTIONS n Filter selection The lter selection switches the IF passband width as shown in the table at right. The filter selection is automatically memorized in each mode. IF q Select the desired mode with the mode switches. w Push [FIL] one or more times to select the desired 9 MHz lter combination.

or does not appear while in normal IF lter.

appears when wide IF lters are selected.

appears when narrow IF lters are selected. When an optional lter is installed, set the optional lter in lter set mode. Optional lters are not se-

lected by default. 455 kHz Filter construction Passband Recommended Filter width selectivity FL-100 500 Hz/6 dB CW-N, RTTY-N FL-101 250 Hz/6 dB CW-N FL-103 2.8 kHz/6 dB SSB-W 1.9 kHz/6 dB SSB-N FL-223 FL-232 350 Hz/6 dB CW-N, RTTY-N FL-52A 500 Hz/6 dB CW-N, RTTY-N FL-53A 250 Hz/6 dB CW-N 2.8 kHz/6 dB SSB-W FL-96 FL-222 1.8 kHz/6 dB SSB-N 3.3 kHz/6 dB SSB-W FL-257 9 MHz IF filter 455 kHz IF filter FL-23 (15 kHz) Mixer CFWS450E (15 kHz) 2nd IF signal FL-272 (2.4 kHz) CFWS450HT (6 kHz) 3rd IF signal FL-103 (2.8 kHz) FL-223 (1.9 kHz) FL-100 (500 Hz) FL-232 (350 Hz) FL-101 (250 Hz) optional FL-65 (2.4 kHz) FL-257 (3.3 kHz) FL-96 (2.8 kHz) FL-222 (1.8 kHz) FL-52A (500 Hz) FL-53A (250 Hz) optional 18 RECEIVE FUNCTIONS 5 9 MHz normal filter selection USB 455 kHz normal filter selection USB 9 MHz narrow filter selection N USB 455 kHz narrow filter selection*

N USB 9 MHz wide filter selection W USB 455 kHz wide filter selection*

W USB Expanded filter selection ON/OFF USB 9 MHz normal filter selection USB 455 kHz normal filter selection USB

* 455 kHz wide or narrow lter selection does ap-

pear when 9 MHz wide or narrow filter is set to OFF. n Filter set mode When an optional lter is installed, set the optional l-

ters in lter set mode. Optional lters are not selected by default. D Optional lter setting q Push [FIL] for 2 sec. to enter lter set mode. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. w Push [UP Y] or [Z DN] one or more times until oP1 appears for 9 MHz IF lter setting or oP2 appears for 455 kHz IF lter setting. e Rotate the tuning dial to select the installed lter. No, 100, 101, 103, 223 and 232 indicate no op-

tional filter, FL-100, FL-101, FL-103, FL-223 and FL-232, respectively for 9 MHz IF lter selection. No, 52A, 53A, 96, 222 and 257 indicate no op-

tional filter, FL-52A, FL-53A, FL-96, FL-222 and FL-257, respectively for 455 kHz IF lter selection. r Push [FIL] to exit lter set mode. D Wide/narrow lter setting q Push [FIL] for 2 sec. to enter lter set mode. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. w Select the desired mode with the mode switches. e Push [UP Y] or [Z DN] one or more times to select the desired width 9 MHz or 455 kHz IF lter. Wide or narrow mode can be deactivated when 9 MHz wide or narrow lter is set to OFF. 455 kHz wide or narrow filter selection does appear when 9 MHz wide or narrow lter is set to OFF. r Rotate the tuning dial to select a lter. t Repeat steps w and r to select IF lters for other modes, if desired. The lter combinations are stored depending on oper-

ating modes. y Push [FIL] to exit lter set mode. D Expanded lter selection ON/OFF The selectable lter combinations can be expanded by setting the expanded lter selection to ON. q Push [FIL] for 2 sec. to enter lter set mode. If a blank memory channel has been selected, push

[V/M] to select VFO mode in advance. w Push [UP Y] or [Z DN] one or more times until EXP appears. e Rotate the tuning dial to turn the expanded filter selection ON/OFF. If ON is selected, the expanded lter selection can be used. r Push [FIL] to exit lter set mode. 19 5 RECEIVE FUNCTIONS n Optional noise reduction function optional UT-106 When an optional UT-106 is installed (DSP appears in the function display), noise reduction function can be used. The noise reduction function reduces noise compo-

nents and picks out desired signals which are buried in noise. The received AF signals are converted to digital signals and then the desired signals are sepa-

rated from the noise. q Push [NR] to turn the noise reduction ON.

[NR] indicator appears. w Push [NR] for 2 sec. to enter the noise reduction level setting condition. Noise reduction example Noise reduction OFF Noise reduction activated Noise components Desired signal (CW) Greater setting of the [NR] level results in audio signal masking or distortion. Set the [NR] level for maximum readability. The noise reduction function is not available in AM and FM modes. e Rotate the tuning dial to adjust the noise reduction level. r Push [NR] to exit the setting condition. t Push [NR] again to turn the noise reduction OFF.

[NR] indicator disappears. n Optional auto notch function When an optional UT-106 is installed (DSP appears in the function display), an auto notch function can be used. The function automatically attenuates more than 3 beat tones, tuning signals, etc., even if they are mov-

ing. The auto notch functions in SSB mode only. q Select SSB mode. w Push [ANF] to turn the auto notch function ON.

[ANF] indicator appears. e Push [ANF] again to cancel the function.

[ANF] indicator disappears. optional UT-106 Auto notch OFF Auto notch ON Desired signal (AF) Desired signal (AF) Unwanted tone frequency Particular frequency is attenuated 20 MEMORY OPERATION 6 n Memory channels The receiver has 101 memory channels. The memory mode is very useful for quickly changing to often-used frequencies. All 101 memory channels are tuneable which means the programmed frequency can be tuned temporarily with the tuning dial, etc. in memory mode. MEMORY CHANNEL Regular memory channels Scan edge memory channels MEMORY CHANNEL NUMBER 199 P1, P2 CAPABILITY TRANSFER TO VFO OVER-

WRITING CLEAR One frequency and one mode in each memory channel. One frequency and one mode in each memory channel as scan edges for programmed scan. Yes Yes Yes Yes Yes No n Memory channel selection D Using the [UP Y] or [Z DN] keys D Using the keypad q Push [V/M] to select memory mode. q Push [V/M] to select memory mode. MEMO appears. w Push [UP Y] or [Z DN] several times to select the desired memory channel. Push and hold [UP Y] or [Z DN] for continuous selec-

tion. e To return to VFO mode, push [V/M] again. MEMO appears. w Push the desired memory channel number using the keypad. Enter 100 or 101 to select scan edge channel P1 or P2, respectively. e Push [V/M] to select the desired memory channel. r To return to VFO mode, push [V/M] again. USB R X USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M V/M USB R X USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO UP or DN S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO 1 2ABC V/M USB R X USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO 21 6 MEMORY OPERATION n Memory channel programming Memory channel programming can be preformed ei-

ther in VFO mode or in memory mode. D Programming in VFO mode q Set the desired frequency and operating mode in VFO mode. w Push [UP Y] or [Z DN] several times to select the desired memory channel. BLANK appears if the selected memory channel is a blank channel (and does not have contents). e Push [MW] for 2 sec. to program the displayed fre-

quency and operating mode into the memory channel. Preamp setting, attenuator on/off, antenna selection, and AGC setting can also be programmed into a mem-

ory channel. D Programming in memory mode q Select the desired memory channel with [UP Y] or

[Z DN] in memory mode. BLANK appears if the selected memory channel is a blank channel (and does not have contents). w Set the desired frequency and operating mode in memory mode. To program a blank channel, use direct frequency entry with the keypad in advance. e Push [MW] for 2 sec. to program the displayed fre-

quency and operating mode into the memory channel. Preamp setting, attenuator on/off, antenna selection, and AGC setting can also be programmed into a mem-

ory channel. 22

[EXAMPLE]: Programming 7.088 MHz/LSB into memory channel 12. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO SSB or keypad LSB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO UP or DN LSB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC BLANK BLANK VFO MW Beep Beep Beep Push for 2 sec. LSB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO

[EXAMPLE]: Programming 21.280 MHz/CW into memory channel 18. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M then UP or DN S1 3 5 7 9 20 40 60dB BLANK BLANK MEMO keypad then CW/RTTY CW R X R X S1 3 5 7 9 20 ANT 1 40 60dB AGC BLANK BLANK MW MEMO Beep Beep Beep Push for 2 sec. CW R X R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO MEMORY OPERATION 6 n Frequency transferring The frequency and operating mode in a memory chan-

nel can be transferred to the VFO. Frequency transferring can be performed in either VFO mode or memory mode. D Transferring in VFO mode This is useful for transferring programmed contents to VFO. TRANSFERRING EXAMPLE IN VFO MODE Operating frequency Contents of M-ch 16

: 21.320 MHz/USB (VFO)

: 14.018 MHz/CW q Select VFO mode with [V/M]. w Select the memory channel to be transferred with

[UP Y] or [Z DN]. BLANK appears if the selected memory channel is a blank channel (and does not have contents). e Push [V/M] for 2 sec. to transfer the frequency and operating mode. Transferred frequency and operating mode appear on the frequency readout. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO UP or DN USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M Beep Beep Beep Push for 2 sec. CW R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO D Transferring in memory mode This is useful for transferring frequency and operating mode while operating in memory mode. TRANSFERRING EXAMPLE IN MEMORY MODE Operating frequency Contents of M-ch 16

: 14.020 MHz/CW (M-ch 16)

: 14.018 MHz/CW When you have changed the frequency or operat-

ing mode in the selected memory channel:

Displayed frequency and mode are transferred. Programmed frequency and mode in the mem-

ory channel are not transferred, and they remain in the memory channel. q Select the memory channel to be transferred with

[UP Y] or [Z DN] in memory mode. And, set the frequency or operating mode if required. w Push [V/M] for 2 sec. to transfer the frequency and operating mode. Displayed frequency and operating mode are trans-

ferred to the VFO. e To return to VFO mode, push [V/M] momentarily. CW R X S1 3 5 7 9 20 ANT 1 40 60dB AGC V/M MEMO Beep Beep Beep Push for 2 sec. CW R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO V/M CW R X S1 3 5 7 9 20 1 ANT 40 60dB AGC VFO V/M CW R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO Displayed memory channel contents are transferred. Memory channel contents remain in the memory channel. 23 6 MEMORY OPERATION n Memory names All memory channels (including scan edges) can be tagged with alphanumeric names of up to 8 charac-

ters each. Letters (capitals except o), numerals and spaces can be used. Numerals can only be used for the 7th and 8th digits. DTurning memory name indication ON/OFF q Select memory mode with [V/M]. w Push [SEL] for 2 sec. to turn memory name indi-

cation ON. Frequency disappears and a memory name appears if programmed. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO Non-named channel e Push [SEL] for 2 sec. to turn memory name indi-

cation OFF. While the memory name indication is selected, pushing [TS] shows the operating frequency; and rotating the tuning dial while pushing [TS] changes the frequency temporally. D Editing (programming) memory names q Select memory mode with [V/M]. w Push [SEL] for 2 sec. to turn memory name indi-

cation ON. e Select the memory channel to program with [UPY]

or [Z DN]. BLANK appears if the selected memory channel is a blank channel (and does not have contents). n Memory clearing Any unnecessary memory channels can be cleared. The cleared memory channels become blank chan-

nels. q Select memory mode with [V/M]. w Select the memory channel to be cleared with

[UP Y] or [Z DN]. e Push [CLR] for 2 sec. to clear the contents. The programmed frequency and operating mode dis-

appear. BLANK appears. r To clear other memory channels, repeat steps w and e. 24 r Push [ENT] to edit memory channel name. A cursor appears and blinks. Memory channel names of blank channels cannot be edited. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO t Input the desired character by pushing a key on the keypad one or more times.

[1] inputs numeral 1.

[2] inputs numeral 2 and letters A to C.

[3] inputs numeral 3 and letters D to F.

[4] inputs numeral 4 and letters G to I.

[5] inputs numeral 5 and letters J to L.

[6] inputs numeral 6 and letters M to O.

[7] inputs numeral 7 and letters P, R and S.

[8] inputs numeral 8 and letters T to V.

[9] inputs numeral 9 and letters W to Y.

[0] inputs numeral 0 and letters Q and Z. Rotate tuning dial for cursor movement. Numerals can only be used for the 7th and 8th digits. Push [] to delete the selected character and input a space. y Push [ENT] to input the set the name. The cursor disappears. Push [CLR] to abandon the settings and return to pre-

vious memory name. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC MEMO u Repeat steps e to y to program another memory channels name, if desired. i Push [SEL] for 2 sec. to turn memory name indi-

cation OFF. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC CLR MEMO Beep Beep Beep Push for 2 sec. S1 3 5 7 9 20 40 60dB BLANK BLANK MEMO SCANS 7 n Scan types PROGRAMMED SCAN/AUTO MEMORY WRITE SCAN Repeatedly scans between two scan edge frequencies

(scan edge memory channels P1 and P2). Auto memory write scan automatically memorizes paused frequencies into memory channels 80 to 99. Scan edge P1 or P2 Scan edge P2 or P1 MEMORY SCAN Repeatedly scans all programmed memory channels. S (select) BLANK Mch 2 Mch 3 Mch 4 Mch 1 S (select) S (select) Mch 5 Scan Jump Mch 99 Mch 7 Mch 6 S (select) S (select) This scan operates in VFO mode. This scan operates in memory mode. SELECT MEMORY SCAN Repeatedly scans all select memory channels. PRIORITY WATCH Repeatedly watches a memory channel. S (select) BLANK Mch 2 Mch 3 Mch 4 Mch 1 S (select) S (select) Mch 5 Mch 99 Mch 7 Mch 6 S (select) S (select) 5 sec. VFO frequency 125 msec. Memory channel This scan operates in memory mode. This scan operates in VFO mode. n Preparation Channels For programmed scan/auto memory write scan:

Program scan edge frequencies into scan edge mem-

ory channels P1 and P2. For memory scan:

Program 2 or more memory channels except scan edge memory channels. For select memory scan:

Designate 2 or more memory channels as select mem-

ory channels. To designate the channel as a select memory channel, select a memory channel, then push

[SEL] in the scan screen (memory mode) or in the memory channel screen. For priority watch:

Program 1 or more memory channels. Scan resume ON/OFF You can select the scan to resume or cancel when de-

tecting a signal, in set mode. Scan resume ON/OFF must be set before operating a scan. See p. 31 for ON/OFF setting and scan resume condition details. Scan speed Scan speed can be selected from 2 levels, high or low, in set mode. See p. 31 for details. Squelch condition Scan start with Programmed scan/

auto memory write scan Memory scan Squelch open The scan continues until it is stopped man-

ually, and does not pause even if it detects signals. Scan pauses on each channel when the scan resume is ON; not applicable when OFF. Scan stops when detecting a signal. Squelch open closed If you set scan resume ON in set mode, the scan pauses for 10 sec. when detecting a sig-

nal, then resumes. When a signal disappears while scan is paused, scan resumes 2 sec. later. 25 7 SCANS n Programmed scan operation q Select VFO mode with [V/M]. w Select the desired operating mode. The operating mode can also be changed while scan-

ning. e Set [RF/SQL] open or closed. See previous page for scan condition. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. r Push [SCAN] to start the programmed scan. SCAN appears while scanning. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO SCAN t When the scan detects a signal, the scan stops, pauses or ignores it depending on the resume set-

ting and the squelch condition. y To cancel the scan, push [SCAN]. If the same frequencies are programmed into the scan edge memory channel P1 and P2, pro-

grammed scan does not start. n Memory/select memory scan operation t When the scan detects a signal, the scan stops, pauses or ignores it depending on the resume set-

ting and the squelch condition. y To cancel the scan, push [SCAN]. 2 or more memory channels must be programmed for memory scan to start. q Select memory mode with [V/M]. w Select the desired operating mode. The operating mode can also be changed while scan-

ning. e Set [RF/SQL] open or closed. See previous page for scan condition. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. r Push [SCAN] to start the memory/select memory scan. SCAN appears while scanning. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC SCAN MEMO S n Setting select memory channels q Select memory mode with [V/M]. w Select the desired memory channel to set as se-

lect memory channel. e Push [SEL] to set the memory channel as a select memory or not. S appears for select memory channels. r Repeat steps w to e to program another memory channel as a select memory channel, if desired. USB R X S1 3 5 7 9 20 1 ANT 40 60dB AGC MEMO S S appears for the select channel. 26 SCANS 7 y When a signal is received on a watch channel, the function display shows the watch channel and SCAN blinks. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC SCAN MEMO u To cancel the watch, push [SCAN]. r Push [SCAN] to start the programmed scan. SCAN appears while scanning. If the same frequencies are programmed into the scan edge memory channel P1 and P2, programmed scan does not start. t Push [MW] to start the auto memory write scan. 80 blinks when auto memory write scan starts. USB R X S1 3 5 7 9 20 ANT 1 40 60dB AGC BLANK BLANK VFO SCAN y When the scan detects a signal, the frequency is programmed into a memory channel (80 to 99), starting from channel 80. u To cancel the scan, push [SCAN]. n Priority watch operation Priority watch checks for signals on a frequency every 5 sec. while operating on a VFO frequency. q Select memory mode with [V/M]. w Select the desired memory channel to be watched with [UP Y] or [Z DN]. e Select VFO mode. r Set [RF/SQL] closed. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. t Push [SCAN] for 2 sec. to start priority watch. SCAN appears. USB S1 3 5 7 9 20 ANT 1 40 60dB AGC VFO SCAN n Auto memory write scan Auto memory write scan operates in the same way as programmed scan. However, when a signal is re-

ceived, the received frequency is automatically writ-

ten into memory channels (80 to 99). When the auto memory write scan starts, the pre-

viously written memory channels (80 to 99) are cleared. 80 81 82 83 84 98 99 14.456.00 14.567.00 14.678.00 14.890.00 14.050.00

--------------

--------------

q Select VFO mode with [V/M]. w Select the desired operating mode. The operating mode can also be changed while scan-

ning. e Set [RF/SQL] closed. If the [RF/SQL] control function is set as RF control, the squelch always opens. See pgs. 14, 30 for details. 27 8 CLOCK AND TIMERS n Setting the current time The receiver has a built-in 24-hour clock with power-

off and power-on timer functions. This is useful when logging SWLs, BCLs and so on. q Push [CLOCK] to select clock indication mode. Current time and CL appear. w Push [(ANT) SET] for 2 sec. to enter time setting condition. Current time ashes. e Set the current time using the tuning dial; or push keypad using 4-digit 24 hour system. r Push [ENT] to set the time. Push [CLR] to cancel the setting. t Push [CLOCK] to exit clock indication mode. n Setting power-on time The receiver can be set to turn ON automatically at a specied time. q Push [CLOCK] to select clock indication mode. w Push [UP Y] to select power-on timer screen. Power-on time and on appear. r Set the desired time using the tuning dial; or push keypad using 4-digit 24 hour system. t Push [ENT] to set the time. Power-on timer is automatically turned ON. Push [CLR] to cancel the setting. TIMER e Push [(ANT) SET] for 2 sec. to enter time setting condition. Power-on time ashes. Push [(ANT)SET] momentarily when the power-on timer is already turned ON. y Push [(ANT)SET] momentarily to toggle the power-

on timer ON and OFF, if necessary. o and X indicates the power-on timer is turned ON and OFF, respectively. u Push [ENT] to exit clock indication mode. i Push [POWER] for 2 sec. to turn the power OFF. When the set time arrives, the power is automatically turned ON. 28 CLOCK AND TIMERS 8 n Setting power-off time The receiver can be set to turn OFF automatically at a specied time. q Push [CLOCK] to select clock indication mode. w Push [UP Y] or [Z DN] twice to select power-off timer screen. Power-off time and oF appear. r Set the desired time using the tuning dial; or push keypad using 4-digit 24 hour system. t Push [ENT] to set the time. Power-off timer is automatically turned ON. Push [CLR] to cancel the setting. TIMER e Push [(ANT) SET] for 2 sec. to enter time setting condition. Power-off time ashes. Push [(ANT)SET] momentarily when the power-off timer is already turned ON. y Push [(ANT)SET] momentarily to toggle the power-

off timer ON and OFF, if necessary. o and X indicates the power-off timer is turned ON and OFF, respectively. u Push [ENT] to exit clock indication mode. When the set time arrives, the power is automatically turned OFF with 5 beeps. n Setting sleep timer period The receiver can be set to turn OFF automatically. The power-off period can be set from 1 min. to 23 hours 59 min. q Push [CLOCK] to select clock indication mode. w Push [Z DN] to select sleep timer screen. Sleep timer period and SL appear. r Set the desired periods using the tuning dial; or push keypad using 4-digit 24 hour system. t Push [ENT] to set the periods. Sleep timer is automatically turned ON. Push [CLR] to cancel the setting. TIMER e Push [(ANT) SET] for 2 sec. to enter time setting condition. Sleep timer period ashes. y Push [(ANT)SET] momentarily to toggle the sleep timer ON or OFF, if necessary. o and X indicates the sleep timer is turned ON and OFF, respectively. u Push [ENT] to exit clock indication mode. i The receiver emits 5 beeps and turns OFF after the sleep timer period elapses. 29 9 SET MODE n Set mode description Set mode is used for programming infrequently changed values or conditions of functions. D Set mode operation q Push [(ANT)SET] to enter the set mode. w Push [UP Y] or [Z DN] to select the desired item. e Set the desired condition using the tuning dial. r Push [(ANT)SET] to exit the set mode. RF/squelch control The [RF/SQL] control can be set as the squelch con-

trol (default; RF gain is fixed at maximum), the RF gain control only (squelch is fixed as open) or RF/squelch control. See p. 14 for details. Conrmation beep A beep sounds each time a switch is pushed to con-

rm it. This function can be turned OFF for silent op-

eration. The volume level can be set in the next item. Beep level This item adjusts the volume level for confirmation beep tones from 0% to 100% in 1% steps. The volume level is displayed in 10% steps. 5 indicates 50% volume level. Beep level limit This item limits the maximum volume level for conr-

mation beep tones. S-meter peak hold The peak level of the S-meter can be displayed for 0.5 sec. to conrm it easily. 30 Scan resume This item sets the scan resume function ON or OFF. on scan resumes 10 sec. after stopping on a signal (or 2 sec. after a signal disappears) oF scan does not resume after stopping on a signal. See p. 25 for scanning details. Scan speed The receiver has 2 speeds for scanning, high and low. See p. 25 for scanning details. AM mode noise blanker The noise blanker for AM mode can be turned ON and OFF. S-AM mode detector The S-AM mode can be detected with the standard AM detector automatically when the signal level is poor. En (Enable) The signal is detected with the standard AM detector when the signal level is poor. The signal is always detected with S-AM. SA (S-AM) CW pitch control The received CW audio pitch and monitored CW audio can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating frequency. The CW audio pitch can be adjusted in 10 Hz steps. The CW audio pitch is displayed in 10 Hz steps. 60 indi-

cates 600 Hz CW audio pitch. Blank channel indication This item sets the blank channel indication ON or OFF. on blank memory channels are skipped and can not be selected. oF all memory channels can be selected. SET MODE 9 31 9 SET MODE Recorder remote This item sets the [REC REMOTE] jack function ON or OFF. CI-V address To distinguish equipment, each CI-V transceiver or re-

ceiver has its own Icom standard address in hexa-

decimal code. The IC-R75s address is 5Ah. When 2 or more IC-R75s are connected to an op-

tional CT-17 CI-V LEVEL CONVERTER, rotate the tuning dial to select a different address for each IC-R75 in the range 01h to 7Fh. CI-V baud rate This item sets the data transfer rate. 3 (300 bps), 12 (1200 bps), 48 (4800 bps), 96 (9600 bps), HI

(19200 bps) and At (automatic) are available. When At is selected, the baud rate is automatically set according to the connected controller or remote controller. CI-V transceive Transceive operation is possible with the IC-R75 con-

nected to other Icom HF transceivers or receivers. When on is selected, changing the frequency, oper-

ating mode, etc. on the IC-R75 automatically changes those of connected transceivers (or receivers) and vice versa. CI-V with IC-735 When connecting the IC-R75 to the IC-735 for trans-

ceive operation, you must change the operating fre-

quency data length to 4 bytes. This item must be set to ON only when operating receiver with the IC-735. Speech language When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can select between English and Japan-

ese as the language. En English announcement JP Japanese announcement See p. 34 for unit installation. 32 Speech speed When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can select between faster or slower syn-

thesizer output. See p. 34 for unit installation. Speech S-level When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can have signal level, frequency, mode and current time announcement. Signal level an-

nouncement can be deactivated if desired. See p. 34 for unit installation. Speech current time When the optional UT-102 VOICE SYNTHESIZER UNIT is installed, you can have signal level, frequency, mode and current time announcement. Current time an-

nouncement can be deactivated if desired. See p. 34 for unit installation. RTTY mark frequency This item selects the RTTY mark frequency. RTTY mark frequency is toggled between 1275, 1615 and 2125 Hz. RTTY shift width This item adjusts the RTTY shift width. There are 3 selectable values: 170, 200 and 425 Hz. LCD backlight This item adjusts the brightness of the LCD from 0 %

to 100 % in 1 % steps. The brightness is displayed in 10% steps. 5 indicates 50%

brightness. Auto tuning step This item sets the auto tuning speed. The tuning dial normally changes the frequency 2.5 kHz/revolution in 10 Hz tuning step. When auto tuning speed is turned on this increases to 50 kHz/revolution in 50 Hz tuning step during quick rotation of the dial. SET MODE 9 33 10 OPTION INSTALLATIONS e Remove the 2 screws from the bottom of the re-

ceiver, slide the cover backward, then remove the bottom cover. n Opening the receivers case Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust an internal unit, etc. CAUTION: DISCONNECT the DC power cable from the receiver before performing any work on the receiver. Otherwise, there is danger of electric shock and/or equipment damage. q Remove the 2 screws from the left side of the re-

ceiver to remove an optional carrying handle, if nec-

essary. w Remove the 4 screws from the top of the receiver and 4 screws from the sides, then lift up the top cover. n CR-282 HIGH STABILITY CRYSTAL UNIT By installing the CR-282, the total frequency stability of the receiver will be improved. q Remove the top cover as shown in the diagram above. w Remove 5 screws from the PLL unit, disconnect P1 from J491 (MAIN unit), then remove the PLL unit. PLL unit e Remove the supplied internal crystal and replace with the CR-282. r Adjust the reference frequency at L2 using a fre-

quency counter. t Return the PLL unit and top cover to their original positions. CR-282 Internal crystal L2 PLL unit Connect a frequency counter here and adjust the frequency to 60.00000 MHz. MAIN unit n UT-102 VOICE SYNTHESIZER UNIT The UT-102 announces the received frequency, mode, S-meter level and current time in a clear, elec-

tronically-generated voice, in English (or Japanese).

Push [LOCK] for 2 sec. to announce the frequency, etc. q Remove the top cover as shown above. w Remove the protective paper attached to the bot-

tom of the UT-102 to expose the adhesive strip. e Plug UT-102 into J1271 on the MAIN unit as shown at right. r Return the top cover to its original position. 34 n UT-106 DSP UNIT The UT-106 provides AF DSP functions such as noise reduction and auto notch. q Remove the top and bottom covers. w Remove the shielding plate. e Remove the connection cable (P1241) from J1221 on the MAIN unit. Connect the cable into J1 on the UT-106. r Plug the connection cable (P1) from the UT-106 to J1221 on the MAIN unit. t Plug the flat cable into J3 on the UT-106 and to J1231 on the MAIN unit. Take care of the conductor direction. y Attach the Velcro tape as shown at right. Attach the UT-106 to the reverse side of the MAIN unit. u Return the shielding plate, top cover and bottom cover to their original positions. n Optional IF lters Several IF lters are available for the IC-R75.You can install 1 lter for both 9 MHz and 455 kHz IF. Choose appropriate lter for your operating needs. 9 MHz optional lters:

FL-101 CW NARROW FILTER FL-232 RTTY/CW NARROW FILTER FL-100 CW NARROW FILTER FL-223 SSB NARROW FILTER FL-103 SSB WIDE FILTER 455 kHz optional lters:

FL-53A CW NARROW FILTER FL-52A CW/RTTY NARROW FILTER FL-222 SSB NARROW FILTER FL-96 SSB WIDE FILTER FL-257 SSB WIDE FILTER 250 Hz/6 dB 350 Hz/6 dB 500 Hz/6 dB 1.9 kHz/6 dB 2.8 kHz/6 dB 250 Hz/6 dB 500 Hz/6 dB 1.8 kHz/6 dB 2.8 kHz/6 dB 3.3 kHz/6 dB 9 MHz filter OPTION INSTALLATIONS 10 UT-106 P1241 J3 P1241 J1231 J1221 D Installation q Remove the top cover as shown on the opposite page. w Install the desired 9 MHz lter as shown in the dia-

gram below. The lters can be installed in either direction. e Install the desired 455 kHz filter as shown in the diagram below. r Replace the top cover. After filter installation, specify the installed filter using filter set mode. (p. 19) Otherwise, the in-

stalled lter will not function properly. 455 kHz filter 35 11 MAINTENANCE n Troubleshooting The following chart is designed to help you correct problems which are equipment malfunctions. If you are not able to locate the cause of a problem or solve it through the use of this chart, contact your near-

est Icom Dealer or Service Center. PROBLEM POSSIBLE CAUSE SOLUTION R E W O P I E V E C E R N A C S Y A L P S D I Power does not come on when the [POWER] switch is pushed. DC power cable is improperly connected. Fuse is blown. No sound comes from the speaker. Volume level is too low. The squelch is closed. Sensitivity is low. The antenna is not connected properly. The antenna for another band is selected. Receive audio is distorted. The attenuator is activated. The operating mode is not selected correctly. PBT function is activated. Noise blanker function is activated. Preamp is activated. The optional noise reduction is activated and the [NR] level is set too high. Reconnect the DC power cable correctly. Check for the cause, then replace the fuse with a spare one.

(Fuses are installed in the DC power cable and the internal MAIN unit.) Rotate [AF] clockwise to obtain a suitable listening level. Rotate [RF/SQL] to 12 oclock position to open the squelch. Reconnect to the antenna connector. Select an antenna suitable for the operating frequency. Push [ATT] to turn the function OFF. Select a suitable operating mode. Set [TWIN PBT] to the center position. Push [NB] to turn the function OFF. Push [P.AMP] once or twice to turn the function OFF. Push [NR] to turn the function OFF. Programmed scan does not stop. Squelch is open.

[RF/SQL] is assigned to RF gain control and squelch is open. Set [RF/SQL] to the threshold point. Reset [RF/SQL] control assignment and set it to the threshold point. Programmed scan does not start. The same frequencies have been programmed in scan edge memory channels P1 and P2. Program different frequencies in scan edge memory channels P1 and P2. Memory scan does not start. 2 or more memory channels have not been programmed. Program 2 or more memory channels. Select memory scan does not start. 2 or more memory channels have not been designated as select channels. Designate 2 or more memory channels as select channels for the scan. F.AGC flashes in the function display. A scan or band scope function is activated via an optional RS-R75 remote control software. If these functions are not in use, push [AGC] to deactivate the function. The displayed frequency does not change properly. The dial lock function is activated. The internal CPU has malfunctioned. Push [LOCK] to deactivate the function. Reset the CPU. REF. p. 37 p. 2 p. 14 p. 16 p. 16 p. 14 p. 15 p. 15 p. 16 p. 20 p. 14 pgs. 14, 30 p. 22 p. 22 p. 26 p. 13 See below. n Resetting the CPU

[POWER]

[ZDN]

[UPY]

36 Resetting CLEARS all programmed contents in memory channels and returns programmed values in set mode to their defaults. When rst applying power or when the function seems to be displaying erroneous information, reset the CPU as follows:

q Make sure receiver power is OFF. w While pushing [UP Y] and [Z DN], push [POWER]

to turn power ON. The internal CPU is reset. The receiver displays its initial VFO frequencies when re-

setting is complete. MAINTENANCE 11 DC POWER CABLE FUSE REPLACEMENT 3 A fuse FGB 3 A n Fuse replacement If a fuse blows or the receiver stops functioning, try to nd the source of the problem, and replace the dam-

aged fuse with a new, rated fuse. CAUTION: DISCONNECT the DC power cable from the receiver when changing a fuse. The IC-R75 has 2 types of fuses installed for receiver protection. DC power cable fuses .................................. FGB 3 A Circuitry fuse ................................................ FGB 3 A CIRCUITRY FUSE REPLACEMENT The 13.8 V DC from the DC power cable is applied to all units in the IC-R75 through the circuitry fuse. This fuse is installed in the MAIN unit. q Remove the top cover as shown on p. 34 w Replace the circuitry fuse as shown in the diagram at right. e Replace the top cover. n Clock backup battery replacement The receiver has a lithium backup battery (CR2032) inside for clock and timer functions. The usual life of the backup battery is approximately 2 years. When the backup battery is exhausted, the receiver receives normally but cannot retain the current time. CR2032 37 12 SPECIFICATIONS D General Frequency coverage

* 0.0329.999999 MHz only for Asia version;

0.0329.999999 and 50.052.0 MHz for Denmark version; specications guaranteed 0.129.99 MHz and 5054 MHz only

: 0.0360.000000 MHz*

Mode Number of memory channels Frequency stability

: USB, LSB, CW, RTTY, AM, S-AM, FM

: 101 (99 regular, 2 scan edges)

: Less than 7 ppm from 1 min. to 60 min. after power on. After that rate of stability less than 1 ppm/hr. at

+25C (+77F). Temperature uctuations 0C to +50C

(+32F to +122F) less than 5 ppm. Power supply requirement

: 13.8 V DC 15%

(negative ground) Antenna connector Current drain

(at 13.8 V DC)

: Standby 0.9 A Max. audio 1.1 A

: SO-239 (50 ), push connection terminal (500 )

: 241(W) 94(H) 229(D) mm Dimensions

(projections not included) 912(W) 31116(H) 9132(D) in Weight (approx.)

: 3.0 kg; 6 lb 10 oz REMOTE connector

: RS-232C D-sub 9-pin CI-V connector

: 2-conductor 3.5 (d) mm (18) D Receiver Receive system

: Triple-conversion superheterodyne system Intermediate frequencies:

Mode 1st (MHz) USB*/LSB* 69.0115 69.0106 CW*

RTTY*

69.0105 AM*/S-AM 69.0100 FM 69.0115 2nd (MHz) 9.0115 9.0106 9.0105 9.0100 9.0115 3rd (kHz) 455 455.9 456 450 450

* Frequencies differ according to the selected IF lter. Sensitivity Frequency range 0.11.8 MHz*1 1.828 MHz*2 2829.99 MHz*2 5054 MHz*3

:

FM SSB/CW/RTTY AM/S-AM 10 dB S/N 2.0 V 0.16 V 0.16 V 0.13 V 10 dB S/N 12 dB SINAD 5.6 V 1.6 V 1.6 V 1.0 V 0.22 V 0.2 V

*1 Preamp: OFF; *2 Preamp 1: ON; *3 Preamp 2: ON Squelch sensitivity (threshold):

SSB, CW, RTTY Less than 5.6 V*1 FM Less than 0.32 V*2

*1 Preamp 1: ON; *2 Preamp 2: ON Selectivity

:

AM, S-AM SSB, CW, RTTY More than 2.1 kHz/6 dB Less than 4.0 kHz/60 dB More than 6 kHz/6 dB Less than 20 kHz/50 dB More than 12 kHz/6 dB Less than 30 kHz/40 dB FM Spurious and image rejection ratio:

Audio output power

(at 13.8 V DC) PHONES connector More than 70 dB

(except IF through/50 MHz band)

: More than 2.0 W at 10%

distortion with an 8 load

: 3-conductor 6.35 (d) mm

(14) External SP connector : 2-conductor 3.5 (d) mm

(18)/8 All stated specications are typical and subject to change without notice or obligation. 38 OPTIONS 13 FL-100, FL-101, FL-103, FL-223 and FL-232 9 MHz FILTERS FL-52A, FL-53A, FL-96, FL-222 and FL-257 455 kHz FILTERS FL-100: 500 Hz/6 dB (CW/RTTY nar.) FL-101: 250 Hz/6 dB (CW nar.) FL-103: 2.8 kHz/6 dB (SSB wide) FL-223: 1.9 kHz/6 dB (SSB nar.) FL-232: 350 Hz/6 dB (RTTY/CW nar.) FL-52A: 500 Hz/6 dB (CW/RTTY nar.) FL-53A: 250 Hz/6 dB (CW nar.) FL-96: 2.8 kHz/6 dB (SSB wide) FL-222: 1.8 kHz/6 dB (SSB nar.) FL-257: 3.3 kHz/6 dB (SSB wide) MB-23 CARRYING HANDLE IC-MB5 MOBILE MOUNTING BRACKET Carrying handle, convenient for portable operation. Receiver mounting bracket for mobile operation. CT-17 CI-V LEVEL CONVERTER SP-21 EXTERNAL SPEAKER For remote receiver control using a personal computer.You can change frequencies, operating mode, memory chan-

nels, etc. Designed for base station operation. Input impedance: 8 Max. input power: 5 W CR-282 HIGH-STABILITY CRYSTAL UNIT Contains a temperature-compensating oven heater and crys-

tal unit for improved frequency stability. Frequency stability: 0.5 ppm UT-102 VOICE SYNTHESIZER UNIT Announces the receive frequency, mode, S-meter level and current time in a clear, electronically-generated voice, in Eng-

lish (or Japanese). RS-R75 REMOTE CONTROL SOFTWARE Allows you to control the receiver from your PC (for Mi-

crosoft Windows 95 or Windows 98). UT-106 DSP UNIT Provides AF DSP functions such as noise reduction and auto notch. Microsoft and Windows are registered trademarks of Mi-

crosoft Corporation. 39 14 CONTROL COMMAND n Remote jack (CI-V) information CI-V connection example The receiver can be connected through an optional CT-17 CI-V LEVEL CONVERTER to a personal computer equipped with an RS-232C port. The Icom Communi-

cations Interface-V (CI-V) controls the following func-

tions of the receiver. Up to 4 Icom CI-V transceivers or receivers can be connected to a personal computer equipped with an RS-232C port. See p. 32 for setting the CI-V condition using set mode. Data format The CI-V system can be operated using the following data formats. Data formats differ according to com-

mand numbers. A data area or sub command is added for some commands. IC-R75 BC-25

(optional) 915 V DC personal computer ct- 17 mini-plug cable CONTROLLER TO IC-R75 OK MESSAGE TO CONTROLLER q w e r t y FE FE 5A E0 Cn Sc Data area r e b m u n

) t h g i r t a d n a m m o C l e b a t e e s

(

) d e x i f

(

e d o c l e b m a e r P s s e r d d a t l u a f e d s r e v e c e R i s s e r d d a t l u a f e d s r e l l o r t n o C r e b m u n

) t h g i r t a l e b a t e e s

(

d n a m m o c b u S y r t n e r e b m u n y r o m e m r o y c n e u q e r f r o f a t a d e d o c D C B IC-R75 TO CONTROLLER q w e r t y FE FE E0 5A Cn Sc Data area r e b m u n

) t h g i r t a d n a m m o c l e b a t e e s

(

b u S r e b m u n

) t h g i r t a d n a m m o C l e b a t e e s

(

) d e x i f

(

e d o c l e b m a e r P s s e r d d a t l u a f e d s r e l l o r t n o C s s e r d d a t l u a f e d s r e v e c e R i 40 y r t n e r e b m u n y r o m e m r o y c n e u q e r f r o f a t a d e d o c D C B u FD

) d e x i f

(

e d o c e g a s s e m f o d n E u FD

) d e x i f

(

e d o c e g a s s e m f o d n E FE FE E0 5A FB FD

) d e x i f

(

e d o c l e b m a e r P

) d e x i f

(

e d o c K O s s e r d d a t l u a f e d s r e l l o r t n o C s s e r d d a t l u a f e d s r e v e c e R i

) d e x i f

(

e d o c e g a s s e m f o d n E NG MESSAGE TO CONTROLLER FE FE E0 5A FA FD

) d e x i f

(

e d o c l e b m a e r P

) d e x i f

(

e d o c G N s s e r d d a t l u a f e d s r e l l o r t n o C s s e r d d a t l u a f e d s r e v e c e R i

) d e x i f

(

e d o c e g a s s e m f o d n E Command table Command Sub command 00 01 02 03 04 05 06 07 08 09 0A 0B 0E 10 Same as command 06 Same as command 06 00*1 01*1 02*1 03*1 04*1 05*1 07*1 08*1 11*1 0001 0101*2 00 01 02 04 22 23 B0 B1 D0 D3 00 01 02 03 04 05 06 07 08 09 10 11 Description Send frequency data Send mode data Read band edge frequencies Read operating frequency Read operating mode

*1Add 00, 01 or 02 for selecting wide, normal or narrow filter, respectively. Set frequency data Set LSB Set USB Set AM Set CW Set RTTY Set FM Set CW-R Set RTTY-R Set S-AM Select VFO mode Select memory mode Select memory channel

*2P1=0100, P2=0101 Memory write Memory to VFO Memory clear Scan stop Programmed/memory scan start Programmed scan start Auto memory write scan start Memory scan start Select memory scan start Set as non-select channel Set as select channel Set scan resume OFF Set scan resume ON 10 Hz (1 Hz) tuning step 100 Hz tuning step 1 kHz tuning step 5 kHz tuning step 6.25 kHz tuning step 9 kHz tuning step 10 kHz tuning step 12.5 kHz tuning step 20 kHz tuning step 25 kHz tuning step 100 kHz tuning step 1 MHz tuning step CONTROL COMMAND 14 Command Sub command Description 11 12 13 00 20 00 01 00 01 02 01 + level data 02 + level data 03 + level data 06 + level data 14 07 + level data 08 + level data 09 + level data 15 16 18 19 1A 01 02 02 12 22 40 41 00 01 00 00 + data 01 + data 02 + data Attenuator OFF Attenuator ON Select [ANT1]

Select [ANT2]

Announce with voice synthesizer

(00=all data; 01=frequency and S-meter level; 02=receive mode)

[AF] level setting (0000=max. CCW to 0255=max. CW)

[RF] level setting (0000=max. CCW to 0255=11 oclock)

[SQL] level setting (0000=11 oclock to 0255=max. CW)

[NR] level setting (0000=min. to 0255=max.) Inside [TWIN PBT] setting

(0000=max. CCW, 0128=center, 0255=max. CW) Outside [TWIN PBT] setting

(0000=max. CCW, 0128=center, 0255=max. CW)

[CW PITCH] setting (0000=low pitch to 0255=high pitch) Read squelch condition Read S-meter level Set preamp (00=OFF;

01=preamp 1; 02=preamp 2) Set AGC time constant (00=OFF;

01=S-fast; 02=fast; 03=slow) Set noise blanker (00=OFF; 01=ON) Set optional noise reduction

(00=OFF; 01=ON) Set optional auto notch

(00=OFF; 01=ON) Turn the receiver power ON Turn the receiver power OFF Read the receiver ID Send/read memory contents

(See example 1 on p. 42) Send/read IF filter setting

(See example 2 on p. 42) Send/read set mode contents

(See example 3 on p. 43) 41 14 CONTROL COMMAND CI-V data example 1 Reading/sending memory contents:

q Memory channel w Select memory ch e Receive frequency 12.345678 MHz r Receive mode t IF lter 39 select ch FM Narrow y Attenuator u Preamp i Antenna selection ANT1 o Memory name NOTE: When reading data, w o are not required. OFF Preamp 1 DXSPOT 1 q w e r t y F E F E 5 A E 0 1 A 0 0 0 0 3 9 0 1 7 8 5 6 3 4 1 2 0 0 0 5 0 3 0 0 0 1 0 0 4 4 85 D X F4 5 3 5 0 S 3 1 P O T Space 1 45 2 0 u F D q w e r t y u i o z H 0 1 z H 1 z H k 1 z H 0 0 1 z H k 0 0 1 z H k 0 1 z H M 0 1 z H M 1 z H G 1 z H M 0 0 1 q r Data Mode LSB 00 USB 01 AM 02 CW 03 04 RTTY Data Mode FM 05 07 08 11 CW-R RTTY-R S-AM Data Mch 1 ch 0001 99 ch 0099 0100 0101 w Data 00 01 P1 P2 SEL OFF ON o Memory name uses ASCII codes Space = 20h Numerals = 30h39h, Alphabetical = 41h5Ah

(except 7th and 8th digits) Non-named channel = FFh t Data IF filter Wide 01 Normal 02 Narrow 03 u Data P.AMP OFF 00 01 02 1 2 y i Data ATT OFF 00 ON 20 Data ANT 00 01 1 2 CI-V data example 2 Reading/sending IF lter setting:

q Receive mode w 9 MHz lter e 455 kHz lter LSB/USB Normal Narrow Wide Normal Narrow Wide 2.4 kHz OFF 15 kHz 6 kHz 2.4 kHz 15 kHz NOTE: When reading data, w and e are not required. q w e r t y Normal Narrow Wide u F E F E 5 A E 0 1 A 0 1 0 0 0 2 0 1 0 7 0 4 0 0 0 0 F D q Data 00 01 02 03 04 05 Mode LSB/USB CW/CW-R RTTY/RTTY-R AM S-AM FM q w e w e w e w Data 00 01 02 03 04 05 06 07 9 MHz filter 15 kHz (built-in) 2.8 kHz (FL-103) 2.4 kHz (built-in) 1.9 kHz (FL-223) 500 Hz (FL-100) 350 Hz (FL-232) 250 Hz (FL-101) OFF e Data 00 01 02 03 04 05 06 07 455 kHz filter 15 kHz (built-in) 6 kHz (built-in) 3.3 kHz (FL-257) 2.8 kHz (FL-96) 2.4 kHz (built-in) 1.8 kHz (FL-222) 500 Hz (FL-52A) 250 Hz (FL-53A) 42 CI-V data example 3 Reading/sending set mode contents:

q Set mode number w Set data 21 (backlighting) Set backlighting to a little on the brighter side (180) NOTE: When reading data, w is not required. CONTROL COMMAND 14 q w e r t y u F E F E 5 A E 0 1 A 0 2 2 1 0 1 8 0 F D q w w changes depending on the set mode contents. Refer to the 'Type' in the table below. Type 1 Type 2 Type 3 0 1 0 1 8 0 hr. min. sec. 1 5 5 0 0 0 Type 4 hr. min. 1 4 3 0 Set mode data table Set mode No (q) Set mode item 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 RF/squelch control Confirmation beep Beep level Beep level limit S-meter peak hold Scan resume Scan speed AM mode noise blanker S-AM mode detector CW pitch control Blank channel indication Recorder remote CI-V transceive CI-V with IC-735 Speech language Speech speed Speech S-level Speech current time RTTY mark frequency RTTY shift width LCD backlight Auto tuning step Expanded filter selection 9 MHz optional IF filter 455 kHz optional IF filter Memory name indication Set current time Power-on timer Set power-on time Power-off timer Set power-off time Sleep timer Set sleep time Selectable value Squech/Auto/RF gain + squelch OFF/ON 0 100%

OFF/ON OFF/ON OFF/ON Low/high OFF/ON S-AM mode/AM mode when signal level is poor 300 Hz 900 Hz OFF/ON OFF/ON OFF/ON OFF/ON English/Japanese Slower/Faster OFF/ON OFF/ON 1275 Hz/1615 Hz/2125 Hz 170 Hz/200 Hz/425 Hz 0 100%

OFF/ON OFF/ON None/FL-100/FL-101/FL-103/FL-223/FL-232 None/FL-52A/FL-53A/FL-96/FL-222/FL-257 Frequency indication/Memory name indication 0:00:00 23:59:59 OFF/ON 0:00 23:59 OFF/ON 0:00 23:59 OFF/ON 0:01 23:59 Data range (w) Data type (w) 00/01/02 00/01 0000 0255 00/01 00/01 00/01 00/01 00/01 00/01 0300 0900 00/01 00/01 00/01 00/01 00/01 00/01 00/01 00/01 00/01/02 00/01/02 0000 0255 00/01 00/01 00/01/02/03/04/05 00/01/02/03/04/05 00/01 000000 235959 00/01 0000 2359 00/01 0000 2359 00/01 0001 2359 1 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 3 1 4 1 4 1 4 43 Count on us!

A-5580H-1EX-q Printed in Japan 1999 Icom Inc. 6-9-16 Kamihigashi, Hirano-ku, Osaka 547-0002 Japan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. FCC PART 15 INDICATION. This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. 2. THE LOCATION OF ABOVE INDICATION. 3. VERBAL DESCRIPTION OF WHERE THE LABLE IS LOCATED. THE FCC PART 15 INDICATION IS ON THE REAR PANELL OF CENTER BOTTOM OF THE RECEIVER. S.KITAGUTCH DIRECTOR OF HF RADIO Mar.9.1999 Ete pucks TITLE DATE

 

 

Icom Inc. 1-6-19, Kamikuratsukuri, Hirano-ku, Osaka Japan. Phone : +81 6 6793 8424 Fax : +81 6 6793 3336 e-mail: world_support@icom.co.jp URL : http:/Awww.icom.co.jp/world Date: June 18, 2009 To Whom It May Concern Subject: Authority to Act as an Agent Applicant: Icom Incorporated Product: Wideband receiver Model: IC-R75 FCC ID: AFJIC-R75 Dear Sir/Madam, We hereby appoint UltraTech Engineering Labs Inc. (UltraTech) to act as our agent in preparation of this application for authorization of above equipment under F.C.C. Rules. We hereby certify that neither the applicant nor any party to the application is subject to a denial Act of 1988, 21 U.S.C. 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a party for these purposes. We also certify that the information provided, properly describe the device or system for which authorization is required. Best Regards, Icom Incorporated,

/, t Tekayettl [L4 brake Takayuki Watanabe General Manager of QA Department of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse - -- -

 

 

 

 

 

 

Icom Inc. 4-6-19, Kamikuratsukuri, Hirano-ku,Osaka Japan. Phone : +81 6 6793 8424 Fax: +81 6 6793 3336 e-mail: world_support@icom.co,jp URL : http:/Avww.icom.co.jpworld Date: June 18, 2009 To Whom It May Concern Subject: | Class 2 Permissive Change Applicant: Icom Incorporated Product: Wideband receiver Model: IC-R75 FCC ID: AFJIC-R75 Dear Sir/Madam This is to inform you that there is class 2 permissive change on IC-R75 to change of parts. This change does not effect to the following specifications, 1) Radio frequency. Thank you for your attention to this matter. Sincerely, Icom Incorporated Thayer AASghs Takayuki Watanabe General Manager of QA Department

 

 

IS EERE ARE Nl MIRE A aut Mn ne oe te ok aera mm ct el oe edge tm a oA amt RD MEARS APL oBOENSOEET ESS TTT IEE ESSE. SA AE Se BE NT ME a me ARs A Be Tm MR OLE: AER RENEE IEEE AE EE EE ESE EADY cer tela te Ei a Pear sie site ot a nate ele alias Lae, il TG ee Icom Inc. 1-6-19, Kamikuratsukuni,Hirano-ku,Osaka Japan. Phone : +81 6 6793 8424 Fax: +81 66793 3336 e-mail: world_support@icom.co.jp URL : http:/Awww. icom.co.jpworld Date: July 16, 2009 To Whom It May Concern Subject: Confidentiality Letter Applicant: Icom Incorporated FCC ID: AFJIC-R75 Dear Sir/Madam:

The applicant would like to request the following documents submitted with this application for certification be withheld from public disclosure as per Section 0.457 & 0.459 of FCC Rules. 1. Block Diagram 2. Schematics 3. Parts List 4. Internal Photographs The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation shall not be made. Regards

Takayuki Watanabe General Manager of Quality Department

 

 

July 16, 2009 Ultratech Engineering Labs, Inc. 3000 Bristol Circle Oakville, Ontario L6H 6G4 Subject:

Applicant:

Product:

Model:

FCC ID:

ICOM Incorporated Wideband Receiver IC-R75 AFJIC-R75 Class II Permissive Change in Accordance with FCC CFR 47, Part 15, Subpart B - Scanning Receivers Operating in the Frequency Band 0.03 - 60 MHz. Dear Sir/Madam, As appointed agent for ICOM Incorporated, we would like to submit the application to Federal Communications Commission for certification of the above product. Please review all files uploaded to your electronic filing site. Manufacturer confirms that there are changes of parts however it does not effect the following specifications.

- Radio frequency OUR TELEPHONE NO.:

See the accompanying letter and documents provided by applicant to identify changes in detail. If you have any queries, please do not hesitate to contact us by our TOLL FREE number:

Yours truly, JaeWook Choi Authorized Agent JaeWook Choi 1-877-747-6381 UltraTech Group of Labs FCC TCB & IC CB Ultratechs Accreditations:

0685 91038 1309 46390-2049 200093-0 SL2-IN-E-1119R Korea KCC-RRL CA2049 3000 Bristol Circle, Oakville, Ontario, Canada L6H 6G4 Tel.: (905) 829-1570 Fax.: (905) 829-8050 Website: www.ultratech-labs.com Email: vic@ultratech-labs.com

 

 

 

 

 

 

Icom Inc. 4-1-32,Kamiminami,Hirano-ku,Osaka 547-0003 Japan. Phone : 06 67935302 Fax : 06 6793 0013 e-mail: world_support@icom.co.jp Letter of Agency October 3, 2006 American Telecommunications Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern;

Please be advised that Icom Incorporated authorizes Tri Minh Luu, P. Eng., and / or UltraTech Engineering Labs Inc. to act on our behalf, until otherwise notified, for applications submitted to American Telecommunications Certification Body, Inc.(ATCB). We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse ACT of 1988, U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002(b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you for your attention to this matter. Icom Incorporated, Yoshiteru Yano General Manager

 

 

Unit MAIN PARTS Ref.No OLD IC2001 Q2021 X2021 C2001 C2011 C2012 C2013 C2014 C2015 C2016 C2021 C2022 C2023 C2024 C2031 C2032 C2033 C2034 C2035 C2036 C2041 C2042 C2051 L2011 L2041 R1204 R1205 R2001 R2002 R2011 R2012 R2021 R2022 R2031 R2032 D1041 C1041 C1042 C1043 C1044 R1041 R1042 R1043 R1044 R1045 R1203 MC13022ADW DTC114EU CSA3.60MGF103 0.001 C1608 B 330P C1608 CH 33P C1608 CH 10 16V ECEV-S B 0.1 C1608 16V B 0.01 C1608 25V B 10 16V ECEV-S B 0.001 C1608 B 39P C1608 CH 12P C1608 CH 47 16V ECEV-S D 0.001 C1608 B 0.001 C1608 B 0.001 C1608 B 0.001 C1608 B 0.1 C1608 16V B 0.1 C1608 16V B 10 16V ECEV-S B 0.1 C1608 16V B 2.2 50V ECEV-S B NL322522T 331J 330U NL322522T 221J 220U 47K ERJ3GE 47K ERJ3GE 10K ERJ3GE 220 ERJ3GE 10K ERJ3GE 100K ERJ3GE 3.9K ERJ3GE 1K ERJ3GE 47K ERJ3GE 47K ERJ3GE

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1SS375 E 0.0047 C1608 B 0.0047 C1608 B 0.0047 C1608 B 0.1 C1608 16V B 1K ERJ3GE 100K ERJ3GE 1K ERJ3GE 68K ERJ3GE 47K ERJ3GE 82K ERJ3GE SCH A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C2 A5-6C2 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C3 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 A5-6C2 IC for AM detector circuit is out of production, and updated the detector circuit to diode detecting circuit. LOCATION Reason of update 3B 3D 3D 3A 3B 3B 3B 3B 3B 3B 3D 3D 3D 3C 4C 4C 4C 4D 3D 3D 3D 3D 2C 3B 3D 6J 6J 3A 3A 3B 3B 3C 3D 3D 3D 7M 7M 7M 7L 7L 7M 7M 7M 7L 7L 6J MAIN J1522 BBH-1 BH-800-4GG A5-6C2 3F CHASSIS MP27 2088 FCC PART15 lavel (A 2178 FCC PART15 lavel (A) -

-

Battery case is out of production, and replaced it with new parts. Updated label

 

 

Icom Inc. 1-6-19 Kamikuratsukuri,Hirano-ku,Osaka Japan. Phone : +81 6 6793 8424 Fax : +81 6 6793 3336 e-mail: world_support@icom.co.jp URL : http:/Awww.icom.co.jp/wortd October 13, 2006 Federal Communications Commission Autohrization & Evaluation Division 7435 Oakland Mills Road Colombia, Maryland 21046 RE: Request for Confidentiality FCC ID: AFJIC-R75 Dear Sir / Madam, Please be advised that the following information is to be held confidential and behalf of Icom Inc.

* Block Diagram

* Schematic Diagram The application contains technical information which Icom Inc deems to be trade secrets and proprietary. If made public, the information might be used to the disadvantage of the applicant in the market place. Thank you for your attention to this matter. Sincerely Icom Incorporated SUE, General Manager

 

 

0 ICOM October 18, 1999 Federal Communications Commission EQUIPMENT APPROVAL SERVICES PO Box 358315 Pittsburgh, PA 15251-3315 Attention: Authorization & Evaluation Division Applicant. ICOM INCORPORATED Equipment: FCC ID: AFJIC-R75 FCC Rules: Part 15.37 (B) (New) Subject: Application for Class Il permissive change Gentlemen:

On behalf of the Applicant, please find the Application for Class II permissive change, Test Data Report and all pertinent documentation, the whole for certification of the referenced equipment as shown, Filing fees were sent with Fee Processing Form. Should you need any further information, kindly contact the writer who is authorized to act for the Applicant. Best regards pawl ehh Masaaki Takahashi Manager, New Product Development MT-sg Fist in Communications

 

 

O COM October 18, 1999 Federal Communications Commission Authorization & Evaluation Division 7435 Oakland Mills Road Columbia, Maryland 21046 Gentlemen:

This is to advise that we are in full compliance with the Anti-Drug Abuse Act. The Applicant is not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 12 USC 862, and no party to the application is Subject to a denial of federal benefits pursuant to that section, Sincerely, ICOM America, Inc. Aaah Masaaki Takahashi Manager, New Product Development MT'smg First in Communications

 

 

December 3, 1999 Federal Communications Commission Authorization & Evaluation Division 7435 Oakland Mills Road Columbia, Maryland 21046 Attention: Authorization & Evaluation Division Applicant: ICOM INCORPORATED Equipment: FCC ID: AFJIC-R75 FCC Rules: Part 2.1043 Subject: Updated information for Class Il Permissive Change Dear Sir/Madam In order to comply with new FCC scanner regulation, a permanently affixed warning label has been attached to the products as per FCC Part 15.121 (f)(1). Otherwise, the device is internally and electronically same. About test report requirement for at least 38dB image rejection of cellular service, the device operates below 520MHz, and is impossible to test and measure the cellular image rejection for Cellular Service Therefore no cellular image test report can be provided Best regards Ak, thee Boe. Takahashi Manager, New Product Development MT:sg First in Communications

 

 

Application for Class II permissive change FCC Identifier AFJIC-R75 October 18, 1999 Scanning Receiver Statement for Compliance with 2.1033 (b) (12) The equipment under application herein incorporates a scanning receiver. Accordingly, $ 15.121 of the Commission's rules applies, The equipment under application herein is incapable of operating (tuning), cr being readily altered by the user to operate within the frequency bands allocated to the Domestic Public callular Radio Telecommunications Service

(Cellular Radio Service"). The equipment is also incapable of converting digital Cellular transmissions to analog voice audio. The receiver portion of the equipment under application herein scans 0.03-

GOMHz, and the receiver does not scan the bands used by the Cellular Radio Service, 624-849 and 869-894MHz_ Since this device does not capable to tune so called 800MHz bands, the receiver does not receive the image signals of cellular radio service. The receiver portion of the equipment under application cannot be altered to enable it to scan the Cellular Radio Service bands by means of clipping the leads Of or installing a diode, resistor andlor jumper wire, or other such simple component. Nor can the receiver be made to scan the Cellular Radio Service bans by replacing a plug-in semiconductor chip, since no such plug-in chips are utilized, The semiconductor chips that are utilized in the equipment cannot be erased and reprogrammed. The equipment has no circuitry capable of connecting any digital signals into analog voice audio, In view of the above, the equipment complies with $ 15.121 of the Commission rules. Sincerely yours, ute ay Masaaki Takahashi Manager, New Product Development First in Communications

 

 

SECTION 4 ADJUSTMENT PROCEDURES 4-1 PREPARATION

REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT DC power supply Output voltage Current capacity

: 13.8 V DC

: 2 A or more Oscilloscope GRADE AND RANGE

: DC20 MHz

: 0.0120 V Frequency range Measuring range Frequency counter Frequency range Frequency accuracy : 1 ppm or better Sensitivity

: 100 mV or better

: 0.160 MHz Audio generator Frequency range Measuring range DC Voltmeter Input impedance

: 0.160 Hz

: 0.0110 mV

: 50 k/V DC or better AC millivoltmeter Measuring range External speaker Standard signal generator (SSG) Input impedance Capacity Frequency range Output level

: 10 mV10 V

: 8

: 4 W or more

: 0.1300 MHz

: 0.1 V32 mV

(127 to 17 dBm)

CONNECTION NOTE:

The [450 ] ANT jack is not used for adjustment AC milli-voltmeter Standard Signal Generator DC power supply 13.8 V / 10A Terminator for the entering adjustment mode Speaker 1/8" (3.5 mm) 2-conductor plug Shorten inner and outer plugs DC IN 50 ANT 450 ANT EXT SP REMOTE connector 4-2 PLL ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT REFERENCE FREQUENCY VCO VOLTAGE 1ST LO VOLTAGE 3RD LO VOLTAGE 3RD LO FREQUENCY BFO VOLTAGE 1 2 1 2 3 4 1 1 1 1 2 Displayed frequency :

29.99999 MHz Mode: USB Displayed frequency :

29.99999 MHz Mode: USB Displayed frequency :

0.03000 MHz Mode: USB Displayed frequency :

60.00000 MHz Mode: USB Displayed frequency :

30.00000 MHz Mode: USB Displayed frequency :

3060.00000 MHz Mode: USB Displayed frequency :

3060.00000 MHz Mode: USB Displayed frequency :

9.4615 MHz Mode: FM Displayed frequency :

14.100000 MHz Mode: USB Displayed frequency :

14.100000 MHz Mode: AM UNIT PLL PLL PLL PLL PLL PLL LOCATION the fre-

Connect quency counter to P1. Connect voltmater to P1. Connect the DC voltmeter to HCP71. the RF VALUE 60.00000 MHz ADJUSTMENT POINT UNIT ADJUST PLL L2 Maximum voltage L4, L5 4.0 V PLL C86 More than 0.8 V Verify 4.0 V PLL C76 More than 0.8 V Connect voltmeter to P91. the RF More than 0.18 V Connect voltmeter to P91. the RF More than 0.022 V Verify Verify Verify the Connect fre-

quency counter to P151. Connect voltmeter to P201. the RF 9.46149.4616 MHz Verify More than 0.022 V Verity Less than 280 V

*This output level of the standard signal generator (SSG) is indicated as SSGs open circuit. PLL UNIT P91 1st and 3rd LO voltage check point P1 Reference frequency check point P151 3rd LO frequency check point P201 BFO voltage check point C76 VCO voltage adjustment C86 HCP71 VCO voltage check point L4 L5 Reference frequency adjustment

(for output voltage is maximum) L2 Reference frequency adjustment

(for output frequency is 60.0000 MHz) MEASUREMENT UNIT Rear Panel LOCATION Connect the AC milli-volt meter to the [EXT SP] jack with an 8 load. VALUE Pre-set to center ADJUSTMENT POINT UNIT ADJUST MAIN R444 R898 4-3 RECEIVER ADJUSTMENTS ADJUSTMENT ADJUSTMENT CONDITION RECEIVER SENSITIVITY 1 Displayed frequency

: 14.10000 MHz Mode : USB

: ON PREAMP1

: ANT1 ANT select

: FAST AGC NOISE BLANKER : OFF RF/SQL PBT1/PBT2 IF FILTER1 IF FILTER2

: CENTER

: CENTER

: 2.4 kHz

: 2.4 kHz 2 Connect an SSG to the antenna connector1 and set as:

Frequency Level

: 14.10150 MHz

: 22 V*

(13 dB) Modulation

: OFF Receiving 1ST MIXER BALANCE 1 Displayed frequency PREAMP1 set an SSG level as

: 0.10000 MHz

: OFF Rear panel Connect an oscillo-

scope to the [EXT SP] jack with 8 load. Minimum noise level MAIN Receiving

: OFF

*This output level of the standard signal generator (SSG) is indicated as SSGs open circuit. MAIN UNIT Maximum output level MAIN L443, L461, L462, L471, L701, L711, L712, L891, L892, L911 L443, R444 EXT SP JACK Receiver sensitivity and 1st mixer balance check point R444 L443 1st mixer balance adjustment L701 L711 L712 L471 L462 L461 L443 L891 L892 L911 R893 R444 Receiver sensitivity adjustment Pre-set to center before receiver sensitivity adjustment RECEIVER ADJUSTMENTS (continued) ADJUSTMENT ADJUSTMENT CONDITION 1ST IF FILTER RECEIVER TOTAL GAIN 1 Displayed frequency Mode PREAMP1 IF FILTER1 IF FILTER2 set an SSG as Frequency Level Deviation Modulation

: 14.10000 MHz

: FM

: ON

: 15 kHz

: 6 kHz

: 14.10000 MHz

: 0.32 V*

(10 dB)

: 3.5 kHz

: 1 kHz Receiving Displayed frequency 1 Mode PREAMP1 IF FILTER1 IF FILTER2 Set an SSG as Frequency Level

: 14.10000 MHz

: USB

: OFF

: 2.4 kHz

: 2.4 kHz

: 14.10150 MHz

: 500 V*

(54 dB) Modulation

: OFF 2 Set an SSG level as

: OFF Receiving MEASUREMENT UNIT Rear panel LOCATION Connect the AC milli-volt meter to the [EXT SP] jack with an 8 load. VALUE Maximum output level ADJUSTMENT POINT UNIT ADJUST MAIN L461, L462 Rear panel Connect the AC milli-volt meter to the [EXT SP] jack with an 8 load. 0 dB

(1.0 V) Front panel

[AF GAIN]

control 30 dB

(10 mV) MAIN R898

*This output level of the standard signal generator (SSG) is indicated as SSGs open circuit. MAIN UNIT EXT SP JACK 1st IF filter and receiver total gain check point L462 L461 1st IF filter adjustment R898 Receiver total gain adjustment RECEIVER ADJUSTMENTS (CONTINUED) ADJUSTMENT ADJUSTMENT CONDITION NOISE BLANKER 1 Displayed frequency Mode Noise Blanker PREAMP1. Set an SSG as Frequency Level

: 14.10000 MHz

: USB

: OFF

: ON

: 14.10000 MHz

: 18 V*

(25 dB) Modulation

: OFF 2 Apply the following signal to the

[ANT1] connector 100 msec. MEASUREMENT VALUE UNIT MAIN LOCATION Connect the oscillo-

scope to the check point CP731. Pre-set to center Minimun voltage ADJUSTMENT POINT UNIT ADJUST MAIN R736 L731, L732 Rear Panel Connect the oscillo-

scope to the [EXT SP] jack with an 8 load. Noise is blanked when the [NB] switch is ON. MAIN R736

*This output level of the standard signal generator (SSG) is indicated as SSGs open circuit. 1 msec. MAIN UNIT EXT SP JACK Noise blanker check point after apply the noise signal R736 Pre-set to center before apply the noise signal Noise blanker adjustment after apply the noise signal L731 L732 Noise blanker adjustment before apply the noise signal CP731 Noise blanker check point before apply the noise signal 4-4 SET MODE ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION ENTERING ADJUSTMENT SET MODE Turn power OFF Connect a terminator to the

[REMOTE] connector on the rear panel. While pushing SET[ANT] and CLOCK keys, and turn power ON. PBT VOLUME 1 Connect an SSG to the antenna connector1 and set as:

Frequency Level Modulation

: 14.15150 MHz

: 50 mV*

(13 dBm)

: OFF Preset both the inner and outer to 12 TWIN PBT controls oclock position. Receiving Set an SSG level as

: OFF S-METER 1 2 Set an SSG level as

: 35 V*

(31 dB) 3 Set an SSG level as

: 28 mV*

(89 dB) 4 FILTER CALIBRATION 1 Set an SSG level as

: 10 V*

(20 dB) 2 Turn power OFF to exit the adjustment set mode.

*This output level of the standard signal generator (SSG) is indicated as SSGs open circuit. When success entering adjustment set mode, shown PBT SET on the display. Then advance to the following setting, or push UP key to scroll the display. Push SET[ANT] key.to set the PBT level. When the PBT level is true, shown GOOD on the display. When S0 level of S-meter adjustment mode entering, displayed S0 LV. Push the SET[ANT] key to set the S0 level. When S9 level of S-meter adjustment mode entering, displayed S9 LV. Push the SET[ANT] key to set the S9 level. When +60 dB level of S-meter adjust-

ment mode entering, displayed +60 LV. Push the SET[ANT] key to set the 60 dB level. When the S-meter adjustment is end, displayed END. When filter calibration adjustment mode entering, displayed FIL CAL. Push the SET[ANT] key to set the fil-

ter calibration. Emit to the beep audio.

 

 

IC-R75 CIRCUIT DESCRIPTION 3-1 RECEIVER CIRCUITS 3-1-1 RF SWITCHING CIRCUIT (MAIN UNIT) The IC-R75 has two antenna connectors. RF signals enter either the [50 ANT.] or [450 ANT.] connector. RF signals from the [50 ANT.] connector are applied to the antenna switching circuit (RL121), and then pass through the low-pass filter (L131, L132, C131C136). RF signals from the [450 ANT.] connector are passed through the L101 to exchange the impeadance value, and are then applied to the antenna switching circuit (RL121). The signals are applied to the low-pass filter (L131, L132, C131C136). Each RF signals from the [50 ANT.] connector or [450 ANT.] connector are chosen by the antenna switching circuit

(RL121). 3-1-2 RF FILTER CIRCUIT (MAIN UNIT) The filtered signals are applied to the RX attenuator switch-

ing circuit (RL141). Either the signals bypass or pass through the attenuator circuit. The signals are attenuated at 20 dB when passing through the attenuators. The attenuator sys-

tem excludes non-linear components between an antenna connector and an attenuator to prevent strong signals from causing distortion. The signals are then applied to the RF fil-

ters. The MAIN UNIT has 8 RF bandpass fileters for signals above 2.0 MHz and 2 low-pass filters for signals below 2.0 MHz.

(1) Below 1.6 MHz The signals are applied to the low-pass filter consisting of C170C175, L171L173 via the limitter circuit (D141, D142). A diode is removed at the entrance of the low-pass filter. This device prevents the diode from causing distortion when receiving very strong signals. A switching diode (D172) is turned on when the B0 line is HIGH.

(2) Above 1.6 MHz The signals are applied to the high-pass filter consisting of C161C163, L161L164. This filter suppresses strong sig-

nals below 1.6 MHz such as broadcasting stations. The filtered signal between 1.6 MHz and 2.0 MHz are applied to the low-pass filter (C182C187, L182, L183) via the switching diode (D181). The switching diodes (D181, D182) are turned ON when the B1 line is HIGH. The filtered signals above 2.0 MHz are applied to one of 8 bandpass filters depending on the receive frequencies. After passing through a bandpass or low-pass filter, the sig-

nals are applied to the pre-amplifier circuit (Q381, Q382, IC391).

(3) FILTER SWITCHING CIRCUIT The RF bandpass filter corresponds to the BPF switching voltage (B0B9) based on the CPU via the shifit registor

(IC551, IC552) and driver (IC561, IC562). The switching volt-

age of the BPF exit ot improve multi-signal and strong signal characteristics. 3-1-3 PRE-AMPLIFIER CIRCUIT (MAIN UNIT) The pre-amplifier circuit uses low noise junction FETs (Q381, Q382) or wideband amplifier (IC391) to provide gain over a wide frequency range. When the [P.AMP] switch is turned PREAMP 1, the signals from the RF filter are amplified by the junction FETs pre-

amplifier circuit (Q381, Q382). When the [P.AMP] switch is turned PREAMP 2, the signals from the RF filter are amplified by the wideband pre-amplifi-

er circuit (IC391). When the [P.AMP] switch is turned PREAMP OFF, the sig-

nals from the RF filter bypass the pre-amplifiers through D371 and D372. The amplified or bypassed signals are applied to the 1st mixer circuit (Q441, Q442) via the low-pass filter (L431, L432 and C431CC436). The low-pass filter attenuates at 50 MHz to suppress image frequency. 3-1-4 1ST MIXER AND IF CIRCUITS (MAIN UNIT) The filtered signals are mixed with a 69.0415129.0115 MHz 1st LO signal to produce a 69.01 MHz 1st IF signal at the 1st mixer circuit (Q441, Q442). The 1st mixer circuit employs a balanced mixer using low-

noise junction FETs (Q441, Q442) to expand the dynamic range. The 69.0415129.0115 MHz 1st LO signal is applied to an LO amplifier (Q411) from the PLL unit via J411, and then passes through the low-pass filter (L421, L422, C422C425). The filtered signal is applied to the 1st mixer circuit. The 1st IF signal is applied to the crystal bandpass filter(FI-

461) to suppress out-of-band signals. The filtered signal is amplified at a 1st IF amplifier (Q471), and then applied to a 2nd mixer circuit (D491) 3-1-5 2ND MIXER AND IF CIRCUITS (MAIN UNIT) The 1st IF signal is mixed with a 60.0 MHz 2nd LO signal to produce 9 MHz 2nd IF signal at the 2nd mixer (D491, C492, L491, L492). The 6.0 MHz 2nd LO signal is applied to the 2nd mixer from the PLL unit via J491. The 9 MHz 2nd IF signal is applied to the crystal bandpass filter (FI701) to suppress unwanted signals. 3 - 1 filtered signal enters The the noise blanker gate

(D711D714). The signal is applied to L712 to obtain clear reception and is then amplified at the 2nd IF amplifier (Q721). The signal passes through a loose resonator circuit (C726, L721) and then is applied to one of the two crystal bandpass filters. When the [FIL] switch is turned 2F3K, the filter is selected FI761 which covering the 2.4 kHz bandwith. When the [FIL] switch is turned 2FOP, the filter is selected an optional filter. When the [FIL] switch is turned 2FTH, the signal from the 2nd IF amplifier bypass the crystal bandpass filters through D771 and D773. The filtered or bypassed signal is amplified at the buffer amplifier (Q801) and applied to the 3rd mixer circuit (IC811). 3-1-6 NOISE BLANKER CIRCUITS (MAIN UNIT) The IC-R75 uses a trigger noise blanker circuit which removes pulse-type noise signals at the noise blanker gate

(D711D714). The 2nd IF signal passes through the crystal bandpass filter

(FI701) to suppress unwanted signals. A portion of the output signal is applied to a noise amplifier circuit (IC731, Q731, Q733) and detected at a noise detector circuit (D731). The detected voltage is applied to a noise blanker gate control cir-

cuit (Q735Q737, D732). The threshold level of the noise blanker gate control circuit

(Q735Q737, D732) is set at 1.0 V on SSB mode (In case of AM mode, is set at 1.6 V). When the detected voltage exceeds the threshold level, Q737 outputs a blanking signal to activate the noise blanker gate (D711D714). A portion of the detected voltage is applied to the noise blanker AGC circuit (Q732, Q734). The noise components are fed back to the noise amplifier (IC731). The time constant of the noise blanker AGC circuit is determined by R737, R744 and C739. This AGC circuit does not operate to detect pulse-type noise. When the operating frequency or mode is changed, the UNLC signal is applied to the noise blanker gate control cir-

cuit (D732). The noise blanker gate prevents PLL click noise. 3-1-7 3RD MIXER AND IF CIRCUITS (MAIN UNIT) The 2nd IF signal is mixed with a 9.4665 MHz 3rd LO signal to produce a 450456 kHz 3rd IF signal at the 3rd mixer

(IC811). The 9.4665 MHz 3rd LO signal is applied to the 3rd mixer IC

(IC811, pin 10) from the PLL unit via J811. The 450456 kHz 3rd IF signal is applied either to one of the 3 ceramic band-

pass filters (FI851, FI861, FI871) or to an optional crystal bandpass filter to suppress unwanted signals. When the [FIL] switch is turned 3F3K, the filter is selected FI851 which covering the 2.4 kHz bandwith. When the [FIL] switch is turned 3F6K, the filter is selected FI861 which covering the 6 kHz bandwith. When the [FIL] switch is turned 3F15, the filter is selected FI871 which covering the 15 kHz bandwith. When the [FIL] switch is turned 3FOP, the filter is selected an optional crystal bandpass filter. When the mode is selected SSB mode, the filtered 3rd IF sig-

nal is amplified at the 3rd IF amplifier (Q891), and is then applied to the 3rd IF amplifier (Q911) via the receiver total gain control circuit (R898). The amplified signal is applied to the SSB demodulator circuit. When the mode is selected FM mode, the filtered 3rd IF sig-

nal is amplified at the 3rd IF amplifier (Q891), and is then applied to the FM demodulator circuit. When the mode is selected AM mode, the filtered 3rd IF sig-

nal is amplified at the 3rd IF amplifier (Q891), and is then applied to the 3rd IF amplifier (Q911) via the receiver total gain control circuit (R898). The amplified signal is applied to the AM demodulator circuit. 1st, 2nd and 3rd IF amplifiers (Q471, Q721, Q891) are con-

trolled by AGC bias voltage. 3-1-8 BFO CIRCUIT (PLL UNIT) The BFO (Beat Frequency Oscillator) circuit consists of Q1, X1, Q201 and IC 201 on PLL unit. The oscillator provides a beat frequency signal to the SSB demodulator circuit (MAIN UNIT; IC1101) for demodulating the 3rd IF signal into an AF signal. The 30 MHz signal is oscillated at Q1 and X1 for the system clock signal of the DDS IC (IC201). The oscillated signal is amplified at Q201 and is applied to the DDC IC (IC201, pin 7) to produce the 455 kHz BFO signal. The 455 kHz signal passes through the low-pass filter (L201, L202, C202C207) via the D/A converter, and is then mixed with the 3rd IF signal at the SSB demodulator circuit (MAIN unit; IC1101). 3-1-9 DEMODULATOR CIRCUIT (MAIN UNIT) The demodulator circuit consists of 3 detector circuits.

(1) SSB DEMODULATOR CIRCUIT A product detector (IC1101) demodulates SSB, RTTY and CW signals into an AF signal. The 3rd IF signal from the IF amplifier (Q911) is mixed with the BFO signal at the product detector (IC1101) to be demodulated into an AF signal. The AF signal passes through the AF input mode selector switch

(IC1201).

(2) FM DEMODULATOR CIRCUIT A FM detector (IC1001, X1001) demodulates the FM signal into an AF signal. The 3rd IF signal from the IF amplifier

(Q891) is amplified at the 3rd IF amplifier (Q1001), and is then applied to the FM detector (IC1001, X1001) to demodu-

late the 3rd IF signal. The demodulated signal is applied to the de-emphasis circuit (IC1211D) to produce the FM AF sig-

nal. The AF signal passes through the AF input mode selec-

tor switch (IC1201). 3 - 2 The FM detector outputs FMNL signal from IC1001, pin 14 is applied to the CPU (LOGIC unit; IC101, pin 94) to control the noise squelch level.

(3) AM DEMODULATOR CIRCUIT The AM demodulater circuit (IC2001) has the envelope detect function and the synchronous detect function. An AM detector (IC2001) demodulates the AM signal into an AF signal. The 3rd IF signal from the IF amplifier (Q911) is amplified at the buffer amplifier (Q1031), and is then applied to the AM demodulater circuit (IC2001)to demodulate the 3rd IF signal into the AM AF signal. The AF signal which is the AM envelope detect the AF signal or the AM synchronous detect AF signal passes through the AF input mode selector switch (IC1201). 3-1-10 AF INPUT MODE SELECTOR SWITCH

(MAIN AND LOGIC UNITS) The AF input mode selector switch (MAIN unit; IC1201) con-

sists of 4 analog switches. The switches are selected mode signals of AFS1 and AFS2 from the CPU (LOGIC unit;

IC101) via the shift registor (MAIN unit; IC1601), and are selected by the squelch control signal from the CPU (LOGIC unit; IC101). The AF signal is output from IC1201 (MAIN unit;

pin 13). 3-1-11 AF AMPLIFIER CIRCUIT

(MAIN AND FRONT UNITS) The AF signal output is passed though the low-pass filter

(IC1211) to suppress unwanted signals. The filtered signal is mixed with BEEP signal at the AF level variable circuit

(MAIN unit; IC1251), and is then applied to the AF amplifier circuit and the AF level variable circuit (IC1251). The AF level variable circuit controls the AF level by the AF GAIN (R141) on the VR BOARD. The AF signal is applied to the AF mute circuit to suppress the noise when AF GAIN

(R141) level is minimum, and is then power-amplified at IC1291 on the MAIN unit to drive the speaker. The one of the AF amplified signal is output AAFO signal to record the AF signal to the AF recording jack (PLL unit; J3). 3-1-12 AGC AND S-METER CIRCUITS (MAIN UNIT) The AGC (Automatic Gain Control) circuit reduces signal fad-

ing and keep the audio output level constant. The receiver gain is determined by voltage on the AGC line (Q1063, col-

lector). When strong signals are received, the AGC circuit decreases the voltage on this line. The 3rd IF signal is amplified at the IF amplifier (Q911). A por-

tion of the 3rd IF signal is applied to the buffer amplifier

(Q1031) to convert the impedance. The amplified IF signal is detected at the AGC detector (D1061) via the C1061, and enters the base of the AGC amplifier (Q1063) to control the voltage on the AGC line. The AGC mode is selected by the receiver mode or AGC swtich on the front panel using the delay control circuit

(Q1064Q1066). The MDAT signal from the CPU (LOGIC board; IC101, pin 21) is applied to the shift resistor (IC1601, pin 2) to produce the AGSS and the AGFS signals. The AGSS signal is applied to the Q1064, the AGFS signal is applied to the Q1065, the AGRS signal from the CPU

(LOGIC unit; IC101, pin 80) is applied to the Q1066 to con-

trol the delay control circuit. The AGRS signal resets the AGC circuit when IC-R75 is working the memory scaning. When the AGC switch is selected OFF, the Q1061 do not supply the voltage to the AGC amplifier (Q1063) via the AGOS line, determining the time constant to deactivate the AGC circuit. A portion of the AGC bias voltage is amplified at the S-Meter amplifier circuit (IC1211C, D831), and then applied to the CPU (LOGIC unit; IC101, pin 95) via the SML line. Thus, the CPU controls S-Meter display. 3-1-13 SQUELCH CIRCUIT

(MAIN AND LOGIC UNIT) The SML signal is applied to the CPU (LOGIC unit; IC101, pin 91) from the meter amplifier circuit (IC1211C, D831). The CPU compares SML signal with the level of SQL volume on the VR BOARD to control the SQL signal. The CPU is output the SQLS signal from pin 81, and then applied to the AF selector circuit (MAIN unit; IC1201, pin 6) which has also the squelch gate circuit. 3-2 PLL CIRCUIT 3-2-1 GENERAL DESCRIPTION The PLL unit generates a 1st LO signal (69.0415129.0115 MHz variable), 2nd LO signal (60 MHz) and 3rd LO signal

(9.4665 MHz) used in the MAIN and BFO units. The IC-R75 uses a DDS (Direct Digital synthesizer) system. The DDS system provides rapid lockup time and high quality frequency oscillation. 3-2-2 REFERENCE OSCILLATOR CIRCUIT

(PLL CIRCUIT) The 30 MHz reference oscillator circuit consists of X1 and Q1. The 30 MHz reference frequency is oscillated to produce all of the LO signals. 3-2-3 1ST LO CIRCUIT (PLL AND MAIN UNIT) The 30 MHz reference frequency is applied to the DDS-IC

(PLL unit; IC21, pin 40) to oscillate the 1st LO signal. The reference frequency is compared to the DDS output signal

(PLL unit; IC21, pin 46) to oscillate the PLL lock voltage. The PLL lock voltage controlls the oscillate frequency of the VCO1 and VCO2 circuit. 3 - 3 The panel switches are connected the CPU input port to the function of the panel switch or are connected some functions of panel switches to the A/D converter input port in the CPU. The CI-V signal which is used for communicate to the per-

sonal computer is controlled by the level control circuit

(IC401A, IC401B, Q401 and so on). The CPU has the clock function. Thus, the CPU and the clock function have the crystal separately. The CPU has the 9.8304 MHz crystal (X112) for the CPU clock, and then the oscillated 9.8304 MHz signal is applied to the IC101, pin 7 and 8. The clock function has the 32.768 kHz crystal (X111). The oscillated 32.768 kHz signal is applied to the CPU

(IC101, pin 4 and 5). When the power is OFF, the EEPROM (IC231) is used for keep on saving the data of memory channels, and so on. 3-3-2 RESET CIRCUIT (LOGIC UNIT) The reset circuit consists of Q391, D381, D382, D393, IC391 and IC392. When IC-R75 is supplied 13.8 V to connect the AC adapter, the HV signal is applied to the IC391, pin 2. The signal which is output from the IC391, pin 1 is applied to the IC392, pin 1. The signal is applied to the Q391, and is then output to the CPU (IC101, pin 9) as CRES reset sig-

nal. A portion of the output signal from the IC392 is input to the CPU (IC101, pin 82) as BKUP signal to backup the clock data. 3-3-3 BACKUP SWITCH CIRCUIT (LOGIC UNIT) IC-R75 has a backup switch circuit (Q511 and Q512). When the power is ON, the H5V signal is applied to Q512, pin 4, and then Q511 is OFF. When the AC adapter is disconnect-

ed, the BATT signal from the battery (MAIN unit; BT1521) is applied to the Q511, and then Q512 is OFF. The output signal is applied to the CPU (IC101, pin 31) as B5V signal to keep on working the clock function. The backup battery is not used while the AC adapter is con-

nected. The oscillated signal at the VCO1 and VCO2 circuit is ampli-

fied at the LO-amplifier (PLL unit; Q91), and passes through the low-pass filter (PLL unit; Q92, D91, D92, L91, L93, C96C100, C102, C103) to supperss high harmonic compo-

nents. The low-pass filter controlls the cut-off frequency of less than 29.999 MHz and more than 30.000 MHz by switch-

ing C102 and C103 ON and OFF respectively. The filtered signal is applied to the LO-amplifier (MAIN unit;

Q411), and is then applied to the 1st mixer circuit (MAIN unit;

Q441, Q442) via the low-pass filter (MAIN unit; L421, L422, C422C425). The reference frequency from the LO-amplifier (PLL unit;

Q91) is also divided by 4 at IC22, and is amplified at the IC23. The signal is applied to the DDS-IC (PLL unit; IC21, pin 88) for the clock signal. 3-2-4 2ND LO CIRCUIT (PLL AND MAIN UNIT) The 30 MHz reference frequency from the Q1 and X1 on the PLL unit is multiplied by 2 at Q2 on the PLL unit. The 60 MHz 2nd LO signal is obtained at the L4 and L5 on the MAIN unit, and is then applied to the 2nd mixer circuit (MAIN unit; D491) via the 3dB attenuator (MAIN UNIT; R491R493). 3-2-5 3RD LO CIRCUIT (PLL AND MAIN UNIT) The 30 MHz reference frequency is oscillated at the Q1 and X1 on the PLL unit, and is then amplified at the Q151 on the PLL unit. The amplified signal is applied to the 10 bits DDS-

IC (PLL unit; IC151, pin 7) for the clock signal to produce the 9.4665 MHz 3rd LO signal. The 3rd LO signal is applied to the D/A converter circuit, and passes through the low-pass filter (PLL unit; L151, L152, C152C157) to suppress spuri-

ous components. The filtered 9.4665 MHz 3rd LO signal is applied to the 3rd mixer circuit (MAIN unit; IC811, pin 10) 3-2-6 BFO LO CIRCUIT (PLL AND MAIN UNIT) The 30 MHz reference frequency is amplified at the Q201 on the PLL unit, and is applied to the 10 bits DDS-IC (PLL unit;

IC201, pin 7) for the clock signal to produce the 455 kHz BFO LO signal. The BFO LO signal is applied to the D/A convert-

er circuit, and passes through the low-pass filter (PLL unit, L201, L202, C202C207) to suppress spurious components. The filtered 455 kHz BFO LO signal is applied to the BFO mixer circuit (MAIN unit; IC1101, pin 10). 3-2-7 VCO CIRCUIT The VCO circuit consists of the VCO1 circuit (PLL unit; Q71, Q72, D71) and VCO2 circuit (PLL unit; Q81, Q82, D81). The VCO1 controls less than displayed frequency of 29.999 MHz to use the PLL lock voltage from the DDS-IC. The VCO2 controls more than displayed frequency of 30.000 MHz to use the PLL lock voltage from the DDS-IC. 3-3 LOGIC CIRCUIT The LOGIC circuit consists of the CPU, the reset circuit, backup battery circuit, and so on. 3-3-1 CPU (LOGIC UNIT) The CPU (IC101) contains 8-bit one chip CPU. The CPU controls the operating frequency, mode, function, display, panel switches, panel volumes. 3 - 4

 

 

oO ICOM March 15, 1999, Federal Communications Commission Authorization & Evaluation Division 7435 Oakland Mills Road Columbia, Maryland 21046 Gentiemen:

This is to advise that we are in full compliance with the Anti-Drug Abuse Act. The Applicant is not subject to a denial of federal benefits pursuant to Section 5201 of the Anti-Drug Abuse Act of 1988, 12 USC 862, and no party tothe application is subject to a denial of federal benefits pursuant to that section. Sincerely ICOM America, Inc. Auk LLL Masaaki Takahashi Manager, New Product Development Mrismg First in Communications

 

 

Application for Equipment Certification FCC Identifier AFJIC-R75 March 15, 1999, Scanning Receiver Statement for Compliance with 2.1033 (b) (12) The equipment under application herein incorporates a scanning receiver. Accordingly, 15.121 of the Commission's rules applies, The equipment under application herein is incapable of operating (tuning),

(oF being readily altered by the user to operate within the frequency bands allocated to the Domestic Public callular Radio Telecommunications Service

(Cellular Radio Service"). The equipment is also incapable of converting digital cellular transmissions to analog voice audio. The receiver portion of the equipment under application herein scans 0.03-

60MHz, and the receiver does not scan the bands used by the Cellular Radio Service, 824-849 and 869-894MHz The receiver portion of the equipment under application cannot be altered to enable it to scan the Cellular Radio Service bands by means of clipping the leads of of installing a diode, resistor andlor jumper wire, or other such simple component. Nor can the receiver be made to scan the Cellular Radio Service bans by replacing a plug-in semiconductor chip, since no such plug-in chips are utilized. The semiconductor chips that are utilized in the equipment cannot be erased and reprogrammed. The equipment has no circuitry capable of connecting any digital signals into analog voice audio. In view of the above, the equipment complies with 15.121 of the Commission rules Sincerely yours, ICOM Incorporated Art Chl Masaaki Takahashi Manager, New Product Development First in Communications