FCC ID: AFJ278201 UHF Mobile Transceiver

!IC-F1721D.qxd 04.9.2 5:58 PM Page a (1,1) INSTRUCTION MANUAL VHF MOBILE TRANSCEIVER iF1721/D iF1821/D UHF MOBILE TRANSCEIVER iF2721/D iF2821/D This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.

!IC-F1721D.qxd 04.9.2 5:58 PM Page i (1,1) IMPORTANT READ ALL INSTRUCTIONS carefully and com-

pletely before using the transceiver. SAVE THIS INSTRUCTION MANUAL This instruction manual contains important operating instructions for the IC-F1721/D, F1821/D, F2721/D and F2821/D VHF/

UHF MOBILE TRANSCEIVERS. EXPLICIT DEFINITIONS WORD RWARNING CAUTION NOTE DEFINITION Personal injury, re hazard or electric shock may occur. Equipment damage may occur. If disregarded, inconvenience only. No risk of personal injury, re or electric shock. PRECAUTION RWARNING! NEVER connect the transceiver to an AC outlet. This may pose a re hazard or result in an electric shock. NEVER connect the transceiver to a power source of more than 16 V DC such as a 24 V battery. This connection will ruin the transceiver. NEVER cut the DC power cable between the DC plug and fuse holder. If an incorrect connection is made after cutting, the transceiver might be damaged. NEVER place the transceiver where normal operation of the vehicle may be hindered or where it could cause bodily injury. NEVER allow children to touch the transceiver. NEVER expose the transceiver to rain, snow or any liquids. USE the supplied microphone only. Other microphones have different pin assignments and may damage the trans-

ceiver. DO NOT use or place the transceiver in areas with tem-

peratures below 30C (22F) or above +60C (+140F), or in areas subject to direct sunlight, such as the dashboard. Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in the United states, the United Kingdom, Germany, France, Spain, Russia and/or other countries. i

!IC-F1721D.qxd 04.9.2 5:58 PM Page ii (1,1) ABOUT APCO PROJECT 25 AVOID operating the transceiver without running the vehi-

cles engine. The vehicles battery will quickly run out if the transceiver transmits while the vehicles engine OFF. AVOID placing the transceiver in excessively dusty envi-

ronments. AVOID placing the transceiver against walls. This will obstruct heat dissipation. AVOID the use of chemical agents such as benzine or alcohol when cleaning, as they damage the transceiver sur-

faces. BE CAREFUL! The transceiver will become hot when operating continuously for long periods. For U.S.A. only CAUTION: Changes or modifications to this transceiver, not ex-

pressly approved by Icom Inc., could void your authority to operate this transceiver under FCC regulations. ii

!IC-F1721D.qxd 04.9.2 5:58 PM Page iii (1,1) TABLE OF CONTENTS IMPORTANT ....................................................................................... i EXPLICIT DEFINITIONS .................................................................... i PRECAUTION .................................................................................... i ABOUT APCO PROJECT 25 ............................................................. ii TABLE OF CONTENTS .................................................................... iii 1 PANEL DESCRIPTION .............................................................. 17 I Front panel .................................................................................. 1 I Function display .......................................................................... 2 I Programmable function keys ...................................................... 3 2 BASIC OPERATION ................................................................ 813 I Turning power ON ....................................................................... 8 I Channel selection ....................................................................... 8 I Call procedure ............................................................................ 9 I Receiving and transmitting ......................................................... 9 D Transmitting notes .................................................................. 10 D TX code channel selection ..................................................... 10 D TX code number edit .............................................................. 11 D Individual ID code selection.................................................... 12 D Talkgroup ID code selection ................................................... 12 D DTMF transmission ................................................................ 12 I User set mode .......................................................................... 13 I Scrambler function .................................................................... 13 3 BIIS OPERATION ................................................................... 1424 I Default setting ........................................................................... 14 I Receiving a call ......................................................................... 14 D Individual call.......................................................................... 14 D Group call ............................................................................... 15 D Displaying the received call record......................................... 15 I Transmitting a call ..................................................................... 16 D Using call memory.................................................................. 16 D Calling back from the queue channel ..................................... 16 D Direct code entry .................................................................... 17 iii I Receiving a message ............................................................... 18 D Receiving a status message .................................................. 18 D Receiving an SDM.................................................................. 18 D Received message selection.................................................. 19 I Transmitting a status ................................................................. 20 D General................................................................................... 20 D Transmitting a status .............................................................. 20 I Transmitting an SDM ................................................................ 21 D General................................................................................... 21 D Transmitting an SDM.............................................................. 21 D Programming an SDM memory.............................................. 22 I Position data transmission ........................................................ 23 I Printer connection ..................................................................... 23 I Digital ANI ................................................................................. 23 I Auto emergency transmission ................................................... 23 I Stun function ............................................................................. 24 I BIIS indication ........................................................................... 24 I Priority A channel selection ....................................................... 24 I Horn output ............................................................................... 24 4 CONNECTION AND MAINTENANCE ................................... 2517 I Rear panel and connection ....................................................... 25 I Supplied Accessories ................................................................ 26 I Mounting the transceiver ........................................................... 27 I Optional UT-111 installation ...................................................... 27 I Optional UT-109 or UT-110 installation ..................................... 28 I Optional OPC-617 installation ................................................... 28 I Antenna...................................................................................... 29 I Fuse replacement ..................................................................... 29 I Cleaning .................................................................................... 29 I Options ..................................................................................... 29 5 SAFETY TRAINING INFORMATION ........................................... 30

!IC-F1721D.qxd 04.9.2 5:58 PM Page 1 (1,1) I Front panel q w e*

I c o m I n c PANEL DESCRIPTION 1 e*

IC-F1721/D F2721/D IC-F1821/D F2821/D o i u y t r q AF VOLUME CONTROL KNOB Rotate the knob to adjust the audio output level. Minimum audio level is pre-programmed. w FUNCTION DISPLAY (p. 2) Displays a variety of information, such as an operating channel number/name, 5-tone code, DTMF numbers and audible condition, etc. e DIAL or UP/DOWN KEYS IC-F1721/D, F2721/D: DIAL Rotate to select an operating channel, etc. IC-F1821/D, F2821/D: UP/DOWN Keys Push to select an operating channel, etc.

*The desired function can be assigned by your dealer. (p. 3) r 10-KEYPAD (IC-F1821/D or IC-F2821/D only) The keypad allows you to enter digits to:

Select memory channels Select tone channels Select DTMF codes (during in the DTMF code channel selection mode) Set TX codes Set BIIS status number Input text message for SDM operation Start up with the password t BUSY INDICATOR Lights green while receiving a signal, or when the squelch is open. 1

!IC-F1721D.qxd 04.9.2 5:58 PM Page 2 (1,1) 1 PANEL DESCRIPTION y POWER SWITCH [POWER]

Push to turn the power ON and OFF. The following functions are available at power ON as options:

- Automatic scan start

- Password prompt

- Set mode u TRANSMIT INDICATOR Lights red while transmitting. i DEALER-PROGRAMMABLE KEYS Desired functions can be programmed independently by your dealer. (p. 3) In this instruction manual, these keys are from the left, called [P0]/[P1]/[P2]/[P3]/[P4]. o MICROPHONE CONNECTOR Connect the supplied microphone or optional DTMF micro-

phone. NEVER connect non-specified microphones. The pin assignments may be different and the transceiver may be damaged. DD MICROPHONE The supplied microphone has a PTT switch and a hanger hook. The following functions are available when the microphone is on or off hook:

- Automatic scan start when on hook.

- Automatic priority channel selection when off hook.

- Sets to Inaudible condition (mute condition) when on hook.

- Sets to Audible condition (unmute condition) when off hook. I Function display q w e r t y u i o 1 3 6 . 1 N a r

!0

!1 q SIGNAL STRENGTH INDICATOR Indicates relative signal strength level. w LOW POWER INDICATOR Appears when low output power is selected. When the battery power decreases to a specified level, low power is selected automatically. e AUDIBLE INDICATOR Appears when the channel is in the audible (unmute) condition. Appears when the specified 2/5-tone/BIIS code is received. r COMPANDER INDICATOR Appears when the compander function is activated. t SCRAMBLER INDICATOR Appears when the voice scrambler function is activated. 2

!IC-F1721D.qxd 04.9.2 5:58 PM Page 3 (1,1) y BELL INDICATOR Appears/blinks when the specific 2/5-tone/BIIS code is received, according to the pre-programming. u CALL CODE MEMORY INDICATOR Appears when the call code memory is selected. i SCROLL INDICATOR Appears when a received SDM including more than 12 characters is displayed. o SDM INDICATOR Appears when an SDM is received, or a transmit SDM is selected.

!0 ALPHANUMERIC DISPLAY Displays an operating channel number, channel name, Set mode contents, DTMF code, etc. The indication type can be selected from 1 line or 2 lines. Ask your dealer for details. In this instruction manual, the LCD illustration is described with 2 lines.

!1 ACTIVATED KEY INDICATOR Appears above the key assigned as the [DIGITAL] key when that key has been activated. PANEL DESCRIPTION 1 I Programmable function keys The following functions can be assigned to [DIAL]*, [P0],

[P1], [P2], [P3] and [P4] programmable function keys. Consult your Icom dealer or system operator for details con-

cerning your transceivers programming. If the programmable function names are bracketed in the fol-

lowing explanations, the specic key is used to activate the function depends on the programming.

*The assignable functions are restricted to [DIAL].

( marked functions are available.) CH UP AND DOWN KEYS Push (or Rotate)* to select an operating channel. Push (or Rotate)* to select a transmit code channel after pushing [TX Code CH Select]. Push (or Rotate)* to select a DTMF channel after pushing

[DTMF Autodial]. Push (or Rotate)* to select a scan group after pushing and holding [Scan A Start/Stop]/[Scan B Start/Stop]. Push (or Rotate)* to select a BIIS code, status number or SDM after pushing [Digital].

*Rotate when this function is assigned to [DIAL]. ZONE UP AND DOWN KEY (This function is for [DIAL] only) Rotate to select the desired zone. 3

!IC-F1721D.qxd 04.9.2 5:58 PM Page 4 (1,1) 1 PANEL DESCRIPTION ZONE SELECT KEY Push this key, then push [CH Up] or [CH Down] to select the desired zone. What is zone?

The desired channels are assigned into a zone according to the intended use. SCAN TAG KEY Push to add or delete the selected channel to the scan group. PRIORITY CHANNEL KEYS Push to select Priority A or Priority B channel. Push and hold [Prio A (Rewrite)] to rewrite the Prio A chan-

nel. SCAN A KEY This keys operation depends on the Power ON Scan set-

MR-CH 1/2/3/4 KEYS Push to select an operating channel directly. ting. When the power ON scan function is turned OFF;

Push to start and cancel scanning operation. In case of transmission during scan, cancels scanning. When the power ON scan function is turned ON;

Push to pause scanning. Scanning resumes after passing a specified time period. In case of transmission during scan, pauses scanning. Scanning resumes after passing a specied time period specied. Push and hold this key for 1 sec. to indicate the scan group, then push [CH Up] or [CH Down] to select the desired group. SCAN B KEY Push to start and cancel scanning operation. In case of transmission during scan, pauses scanning. Scanning resumes after passing a specied time period. Push and hold this key for 1 sec. to indicate the scan group, then push [CH Up] or [CH Down] to select the desired group. 4 MONITOR KEY Mute and release the CTCSS (DTCS) or 2-tone squelch mute. Open any squelch/deactivate any mute while push-

ing this key. (LMR operation only) Activates one of (or two of) the following functions on each channel independently: (PMR or BIIS PMR operation only) Push and hold to un-mute the channel (audio is emitted;

Audible condition). Push to mute the channel (sets to Inaudible only). Push to un-mute the channel (sets to Audible only). Push after the communication is nished to send a reset code. NOTE: The un-mute condition (Audible condition) may automatically return to the mute condition (Inaudible con-

dition) after a specied period.

!IC-F1721D.qxd 04.9.2 5:58 PM Page 5 (1,1) PUBLIC ADDRESS KEY When an optional OPC-617 ACC CABLE is installed, the audio output via the cable can be controlled from the transceiver separately from the [VOL] control. This audio output can be used as a public address function when an external audio amplier and speaker are connected additionally. Push this key, then speak into the microphone while pushing the PTT switch. The [CH Up]/[CH Down] keys allow you to set the audio output level from minimum to maximum. RX SPEAKER KEY When the external connections are made for the public address function, the external speaker drive function is also available simultaneously. The received audio can be heard via the external speaker when this key is pushed. This function is useful when you are out of the vehicle. The audio output level is linked to the transceivers volume control. LIGHT KEY Push to turn the transceivers backlight ON temporarily when the backlight function is turned OFF in user set mode. LOCK KEY Push and hold to electronically lock all programmable keys except the following:

[Call] (incl. Call A and Call B), [Moni(Audi)] and [Emergency]. PANEL DESCRIPTION 1 OUTPUT POWER SELECTION KEY Push to select the transmit output power temporarily or per-

manently, depending on the pre-setting. Ask your dealer for the output power level for each selection. C.TONE CHANNEL ENTER KEY Push to select the continuous tone channel using [CH Up]/

[CH Down] to change the tone frequency/code setting after pushing this key for permanent operation. TALK AROUND KEY Turn the talk around function ON and OFF. The talk around function equalizes the transmit frequency to the receive frequency for transceiver-to-transceiver communication. WIDE/NARROW KEY Push to toggle the IF bandwidth between wide and narrow. The wide passband width can be selected from 25.0 or 20.0 kHz using the CS-F1700 CLONING SOFTWARE. (PMR or BIIS PMR opera-

tion only) Ask your Dealer for details. DTMF AUTODIAL KEY Push to enter the DTMF channel selection mode. Then select the desired DTMF channel using [CH Up]/[CH Down]/[CH Up/Down] keys. After selecting the desired DTMF channel, push this key to transmit the DTMF code. DTMF RE-DIAL KEY Push to transmit the last-transmitted DTMF code. 5

!IC-F1721D.qxd 04.9.2 5:58 PM Page 6 (1,1) 1 PANEL DESCRIPTION CALL KEYS Push to transmit a 2/5-tone/BIIS ID code. Call transmission is necessary before calling another station depending on your signalling system.

[Call A] and/or [Call B] may be available when your system employs selective Individual/Group calls. Ask your dealer which call is assigned to each key. EMERGENCY KEYS Push and hold to transmit an emergency call. When [Emergency Single (Silent)] or [Emergency Repeat

(Silent)] is pushed, an emergency call is transmitted without a beep emission and LCD indication change. If you want to cancel the emergency call, push (or push and hold) the key again before transmitting the call. The emergency call is transmitted one time only or repeatedly until receiving a control code depending on the pre-setting. TX CODE ENTER KEY (PMR or BIIS PMR operation only) Push to enter the ID code edit mode directly, for both 5-tone and MSK. Then set the desired digit using [CH Up]/

[CH Down]/[CH Up/Down] or 10-keypad*. (p. 11)

*IC-F1821/D or IC-F2821/D only TX CODE CHANNEL SELECT KEY Push to enter the ID code channel selection mode directly. Then set the desired channel using [CH Up]/[CH Down]/

[CH Up/Down]. (p. 10) While in ID code channel selection mode, push for 1 sec. to enter the ID code edit mode for 5-tone and MSK. Then set the desired digit using [CH Up]/[CH Down]/[CH Up/Down]

or 10-keypad*. (p. 11)

*IC-F1821/D or IC-F2821/D only TX CODE CHANNEL UP/DOWN KEYS Push (or Rotate)* to select a TX code channel directly.

*Rotate when this function is assigned to [DIAL]. ID MEMORY READ KEY (PMR or BIIS PMR operation only) Recalls detected ID codes. Push this key, then push [CH Up]/[CH Down] for selection. Up to 5 IDs are memorized. Push and hold to erase the selected memorized IDs. VOICE SCRAMBLER FUNCTION Push to toggle the voice scrambler function ON and OFF. COMPANDER KEY Push to toggle the compander function ON and OFF. The compander function reduces noise components from the transmitting audio to provide clear communication. 6

!IC-F1721D.qxd 04.9.2 5:58 PM Page 7 (1,1) PANEL DESCRIPTION 1 USER SET MODE KEY Push and hold to enter user set mode. During user set mode, push this key to select an item, and push

[CH Up]/[CH Down] to change the value or condition. Push and hold this key again to exit user set mode. User set mode is also available via the Power ON function. Please refer to p. 13 also. OPT OUT KEYS Push to control the optional unit connector output signal level. DIGITAL KEY (BIIS operation only) Push to select the call ID list, transmit message and stand-

by condition. Toggles between queue channel and received message record indication after queue channel is selected. Push and hold to select queue channel indication. STATUS UP/DOWN KEYS (BIIS operation only) While in the standby condition, push (or rotate)* to display the transmit status indication and select a status number. When a received SDM is displayed, push (or rotate)* to cancel the automatic scroll and scroll the message manu-

ally. When an SDM that contains more than 12 characters is displayed, push (or rotate)* to scroll the message manually.

*Rotate when this function is assigned to [DIAL]. D For Digital mode operation only INDIVIDUAL KEY Push to enter the individual ID code selection mode direct-

ly. Then select the desired individual ID code using [CH U

[CH Down]/[CH Up/Down]. (p. 12) p

Push to stop the beep emission when receiving a matched individual ID code. TALKGROUP KEY Push to enter the talkgroup ID code selection mode direct-

ly. Then select the desired talkgroup ID code using [CH Up]/ [CH Down]/[CH Up/Down]. (p. 12) Push to stop the beep emission when receiving a matched talkgroup ID code. 7

!IC-F1721D.qxd 04.9.2 5:58 PM Page 8 (1,1) 2 BASIC OPERATION I Turning power ON q Push [

w If the transceiver is programmed for a start up password,

] to turn the power ON. I Channel selection Several types of channel selections are available. Methods may differ according to your system set up. NON-ZONE TYPE:

Push [CH Up] or [CH Down], or rotate [CH Up/Down] to select the desired operating channel, in sequence; or, push one of

[MR-CH 1] to [MR-CH 4] keys to select a channel directly. ZONE TYPE:

Push [Zone] then push [CH Up] or [CH Down], or rotate [Zone Up/Down] to select the desired zone. AUTOMATIC SCAN TYPE:

Channel setting is not necessary for this type. When turning power ON, the transceiver automatically starts scanning. Scanning stops when receiving a call. input the digit codes as directed by your dealer. 10-keypad* can be used for password input.

*IC-F1821/D or IC-F2821/D only:

The keys as below can be used for password input:

The transceiver detects numbers in the same block as identical. Therefore 01234 and 56789 are the same. P0 P1 P2 P3 P4

*In this instruction manual, these keys are from the left, called [P0]/[P1]/[P2]/[P3]/[P4]. KEY P0 P1 P2 P3 P4 NUMBER 0 5 1 6 2 7 3 8 4 9 e When the PASSWORD indication does not clear after inputting 4 digits, the input code number may be incorrect. Turn the power off and start over in this case. 8

!IC-F1721D.qxd 04.9.2 5:58 PM Page 9 (1,1) I Call procedure When your system employs tone signaling (excluding CTCSS and DTCS), the call procedure may be necessary prior to voice transmission. The tone signalling employed may be a selec-

tive calling system which allows you to call specic station(s) only and prevent unwanted stations from contacting you. q Select the desired TX code channel, 2/5-tone code, Individual ID code* or Talkgroup ID code* according to your System Operators instructions. This may not be necessary depending on programming. Refer to pgs. 1012 for selection.

*Digital mode operation only. w Push the call key (assigned to one of the dealer program-

mable keys) or [PTT]. e After transmitting, the remainder of your communication can be carried out in the normal fashion. Selective calling Non-selective calling BASIC OPERATION 2 I Receiving and transmitting Receiving:

q Push [

w Push [CH Up] or [CH Down], or rotate [CH Up/Down] to

] to turn the power ON. select a channel, in sequence. e When receiving a call, adjust the audio output level to a comfortable listening level. Transmitting:

Wait for the channel to become clear to avoid interference. q Take the microphone off hook. 2-tone, 5-tone mute may be released. (The audible condition is selected and BUSY indicator lights green.) A priority channel may be selected automatically. w Wait for the channel to become clear. The channel is busy when BUSY indicator lights green. e Push [CALL] when initiating a call from your side. Coded audio may be heard from the transceiver, then appears. This operation may not be necessary depending on your signal-

ing system. Ask your dealer for details. r While pushing and holding [PTT], speak into the micro-

phone at your normal voice level. t Release [PTT] to receive. IMPORTANT: To maximize the readability of your signal;

1. Pause briey after pushing [PTT]. 2. Hold the microphone 5 to 10 cm (2 to 4 inches) from your mouth, then speak into the microphone at a normal voice level. 9

!IC-F1721D.qxd 04.9.2 5:58 PM Page 10 (1,1) 2 BASIC OPERATION D Transmitting notes Transmit inhibit function The transceiver has several inhibit functions which restrict transmission under the following conditions:

- The channel is in mute condition (Inaudible condition;

does not appear.)

- The channel is busy.

- Un-matched (or matched) CTCSS is received.

- The selected channel is a receive only channel. Time-out timer After continuous transmission for the pre-programmed time period, the time-out timer is activated, causing the transceiv-

er to stop transmitting. Penalty timer Once the time-out timer is activated, transmission is further inhibited for a period determined by the penalty timer. D TX code channel selection If the transceiver has [TX Code CH Select] assigned to it, the indication can be toggled between the operating channel number (or name) and TX code channel number (or name). When the TX code channel number (or name) is displayed,

[CH Up], [CH Down] or [CH Up/Down] selects the TX code channel. USING [TX CODE CH SELECT] KEY:

q Push [TX Code CH Select] a TX code channel number

(or name) appears. w Push [CH Up] or [CH Down], or rotate [CH Up/Down] to select the desired TX code channel. e Push [Call] (or [PTT] during MSK operation) to transmit the selected TX code. USING [TX CODE CH UP]/[TX CODE CH DOWN] KEY:

If the transceiver has a [TX Code CH Up], [TX Code CH Down] or [TX Code CH Up/Down] key assignment, the pro-

grammed TX code channel can be selected directly when pushed or rotated. NOTE for PMR or BIIS PMR operation:

The LCD indication is not changed when the operating channel number (or name) is displayed. To check the selected TX code, push [TX Code CH Select]. 10

!IC-F1721D.qxd 04.9.2 5:58 PM Page 11 (1,1) BASIC OPERATION 2 USING [TX CODE ENTER] KEY:

q Select the desired TX code channel via [TX Code CH Select]+[CH Up] or [CH Down], [TX Code CH Up], [TX Code CH Down] or [TX Code CH Up/Down]. w Push [TX Code Enter] to enter the TX code edit mode. e Push [TX Code Enter] to select the desired digit to be edit-

ed. The editable digit blinks. r Push [CH Up], [CH Down] or 10-keypad*, or rotate [CH Up/Down] to set the desired digit . t Push [TX Code Enter] to set the digit. The editable digit will move to the right automatically. When the 10-keypad* is used to set, the editable digit will move to the right automatically without pushing [TX Code CH Select]. y Repeat r and t to input all allowable digits. u Push [Call] or [PTT] to transmit the edited TX code.

*IC-F1821/D or IC-F2821/D only D TX code number edit

(PMR or BIIS PMR operation only) If the transceiver has [TX Code CH Select] or [TX Code Enter] assigned to it, TX code contents can be edited within the allowable digits. USING [TX CODE CH SELECT] KEY:

q Push [TX Code CH Select] to enter the TX code channel selection mode. Select the desired channel before entering the TX code channel selection mode if necessary. w Push [TX Code CH Select] for 1 sec. to enter the TX code edit mode. e Push [TX Code CH Select] to select the desired digit to be edited. The editable digit blinks. r Push [CH Up], [CH Down] or 10-keypad*, or rotate [CH Up/Down] to set the desired digit. t Push [TX Code CH Select] to set the digit. The editable digit will move to the right automatically. When the 10-keypad* is used to set, the editable digit will move to the right automatically without pushing [TX Code CH Select]. y Repeat r and t to input all allowable digits. u Push [Call] or [PTT] to transmit the edited TX code.

*IC-F1821/D or IC-F2821/D only 11

!IC-F1721D.qxd 04.9.2 5:58 PM Page 12 (1,1) 2 BASIC OPERATION D Individual ID code selection

(Digital mode operation only) If the transceiver has [Individual] assigned to it, the indication can be toggled between the operating channel number (or name) and Individual ID code (or name). When the Individual ID code (or name) is displayed, [CH Up], [CH Down] or [CH Up/Down] selects the desired Individual ID code. q Push [Individual] an Individual ID code (or name) appears. w Push [CH Up] or [CH Down], or rotate [CH Up/Down] to select the desired Individual ID code. e Push [PTT] to transmit the selected Individual ID code. D Talkgroup ID code selection

(Digital mode operation only) If the transceiver has [Talkgroup] assigned to it, the indication can be toggled between the operating channel number (or name) and Talkgroup ID code (or name). When the Talkgroup ID code (or name) is displayed, [CH Up], [CH Down] or [CH Up/Down] selects the desired Talkgroup ID code. q Push [Talkgroup] a Talkgroup ID code (or name) appears. w Push [CH Up] or [CH Down], or rotate [CH Up/Down] to select the desired Talkgroup ID code. e Push [PTT] to transmit the selected Talkgroup ID code. 12 D DTMF transmission If the transceiver has [DTMF Autodial] assigned to it, the auto-

matic DTMF transmission function is available. Up to 8 DTMF channels are available. TO SELECT A TX CODE:

q Push [DTMF Autodial] a DTMF channel appears. w Push [CH Up] or [CH Down], or rotate [CH Up/Down] to select the desired DTMF channel. e Push [DTMF Autodial] to transmit the DTMF code in the selected DTMF channel.

!IC-F1721D.qxd 04.9.2 5:58 PM Page 13 (1,1) I User set mode User set mode is accessed with [User Set Mode] and allows you to set seldom-changed settings. In this case you can customize the transceiver operation to suit your preferences and operating style. Entering the user set mode:

q While pushing and holding [P1] and [P2], push [

] to turn the power ON. Then, push and hold [P0] to enter user set mode, allowing you to set seldom-changed settings.

[P1] [P2]

w Push [P0] several times to select the appropriate item. Then, push [Up] or [Down] or rotate [DIAL] to set the desired level/condition. Available set mode functions are Backlight, LCD Contrast, Beep, Beep Level, SQL Level, AF Min Level, Mic Gain and Horn.

[P0]

[Up]/[Down] or [DIAL]

BASIC OPERATION 2 e Push [

] (or push and hold [P0]) again to exit set mode.

[P1]

User set mode is also available via a programmable key. Please refer to p. 7 [User Set Mode] section. I Scrambler function The voice scrambler function provides private communication between stations. The frequency inversion type is equipped to all versions, moreover, the optional Rolling or Non-rolling type can be available. q Push [Scrambler] to turn the scrambler function ON. appears. w Push [Scrambler] again to turn the scrambler function OFF. disappears. 13

!IC-F1721D.qxd 04.9.2 5:58 PM Page 14 (1,1) 3 BIIS OPERATION I Default setting The following functions are assigned to each programmable key as the default. However, the assigned function can be changed by your dealer. Ask your dealer for details. NOTE: [TX Code Enter] must be assigned to any key. P0 P1 P2 P3 P4

[P0]; Call

[P1]; Digital

[P3]; TX Code Enter

[P4]; Moni(Audi) In this instruction manual, these keys are from the left, called

[P0]/[P1]/

[P2]/[P3]/[P4].

: Push to transmit a 5-tone/BIIS call when the selected channel is a 5-

tone or MSK channel, respectively.

: Push to select the call list ID/transmit message, or to display the receive message record for selection.

: Push to enter the ID code edit mode directly for both 5-tone and MSK.

: Push this key after the communica-

tion to send a Clear down signal during MSK channel operation.

: No function is assigned.

[P2]; Null

[Up]/[Down]/[DIAL]; CH Up/Down

: While in the standby condition, selects the operating channel. After pushing [Digital] or [TX Code CH Select], selects call list or TX code channel, respectively. 14 I Receiving a call DDIndividual call q When an individual call is received;

appears and the mute is released. Beeps sound. The programmed text message (e.g.CALLING) and the calling station ID (or text) is displayed when the display type is 2lines. The programmed text message (e.g.CALLING) and the calling station ID (or text) is displayed alternately when the display type is 1line, depending on the setting. appears or blinks depending on the setting. Appears Appears or blinks C A L L I N G 0 5 0 0 w Push and hold [PTT], then speak into the microphone at a normal voice level. TX indicator lights red. e Release [PTT] to return to receive. BUSY indicator lights green while receiving a signal. r To nish the conversation, push [P4] (Moni(Audi)) to send the Clear down signal. Either station can send a Clear down signal. CLR DOWN is displayed for 2 sec. (approx.). dition. disappears and the transceiver returns to the standby con-

!IC-F1721D.qxd 04.9.2 5:58 PM Page 15 (1,1) DDGroup call q When a group call is received;

appears and the mute is released. Beeps sound. The programmed text message (e.g.GROUP) and the calling station ID (or text) is displayed when the display type is 2lines. The programmed text message (e.g.GROUP) and the calling station ID (or text) is displayed alternately when the display type is 1line, depending on the setting. appears or blinks depending on the setting. Appears Appears or blinks G R O U P 1 1 2 0 w Push and hold [PTT], then speak into the microphone at a normal voice level. NOTE: Only one station is permitted to speak. TX indicator lights red. e Release [PTT] to return to receive. BUSY indicator lights green while receiving a signal. r To nish the conversation, push [MONITOR] (Moni(Audi)) to send the Clear down signal. Either station can send a Clear down signal. CLR DOWN is displayed for 2 sec. (approx.) dition. disappears and the transceiver returns to the standby con-

BIIS OPERATION 3 DDDisplaying the received call record Queue indication The transceiver memorizes the calling station IDs for record. Up to 3 calls can be memorized, and the oldest call record is erased when a 4th call is received. However, once the trans-

ceiver is powered OFF, the all records are cleared. q Push [P1] (Digital) for 1 sec. Displays following indication. When a record is available

< Q U E U E >

- Q U E U E ! -

When no record is available

< Q U E U E >

N O Q U E U E w Push [Up] or [Down], or rotate [DIAL] to select the desired call. e Push [P1] (Digital) for 1 sec. again to return to the standby condition. When no operation is performed for 30 sec., the transceiver returns to the standby condition automatically. 15

!IC-F1721D.qxd 04.9.2 5:58 PM Page 16 (1,1) 3 BIIS OPERATION I Transmitting a call Total of a 3 ways for code selection are availableselecting the call code from memory, entering the call code from the keypad and calling back from the queue channel record. DDUsing call memory q While in the standby condition, push [P1] (Digital) to enter the call code memory channel selection mode. appears. Appears F L E E T 1 0 0 Call code text is displayed. w Push [Up] or [Down], or rotate [DIAL] to select the desired call code. e Push [P0] (Call) or [PTT]* to call.

*PTT call can be made only when PTT call capability is permitted. NOTE: When no answer back is received, the trans-

ceiver repeats the call 3 times (default) automatically, and WAIT is displayed during each call. However, an error beep sounds and FAILED is displayed when no answer back is received after the calls. r Push [PTT] to transmit; release to receive. t Push [P4] (Moni(Audi)) to send the Clear down signal. 16 DDCalling back from the queue channel q While in the standby condition, push [P1] (Digital) for 1 sec. to enter the queue memory channel selection mode. w Push [Up] or [Down] or rotate [DIAL] to select the desired record.

< Q U E U E >

- Q U E U E ! -

e Push [P0] (Call) or [PTT]* to call.

*PTT call can be made only when PTT call capability is permitted. NOTE: When no answer back is received, the trans-

ceiver repeats the call 3 times (default) automatically, and WAIT is displayed during each call. However, an error beep sounds and FAILED is displayed when no answer back is received after the calls. r Push [PTT] to transmit; release to receive. t Push [P4] (Moni(Audi)) to send the Clear down signal.

!IC-F1721D.qxd 04.9.2 5:58 PM Page 17 (1,1) DDDirect code entry q While in the standby condition, push [P3] (TX Code Enter) to enter the TX code edit mode. Editable code digit blinks. 0 5 0 0 w Push [P3] (TX Code Enter) to select the desired digit to be edited. Editable digit differs according to the setting. e Set the desired digit using [CH Up]/[CH Down]/[DIAL] or 10-keypad*.

*IC-F1821/D or IC-F2821/D only r Push [P3] (TX Code Enter) to set the digit, then the editable digit will move to the right automatically. When the 10-keypad is used to set, the editable digit will move to the right automatically without pushing [P3] (TX Code Enter). t Repeat e and r to input all allowable digits. y Push [P0] (Call) or [PTT]* to call.

*PTT call can be made only when PTT call capability is permitted. NOTE: When no answer back is received, the trans-

ceiver repeats the call 3 times (default) automatically, and WAIT is displayed during each call. However, an error beep sounds and FAILED is displayed when no answer back is received after the calls. BIIS OPERATION 3 u Push [PTT] to transmit; release to receive. i Push [P4] (Moni(Audi)) to send the Clear down signal. For your information When the UpDate setting for the call code is enabled, the set code is overwritten into the call code memory. 17

!IC-F1721D.qxd 04.9.2 5:58 PM Page 18 (1,1) 3 BIIS OPERATION I Receiving a message DDReceiving a status message q When a status message is received;

DDReceiving an SDM (Short Data Message) q When an SDM is received;

Beeps sound. The calling station ID (or text) and the status message is dis-

Beeps sound. The calling station ID (or text) and the SDM is displayed alter-

played alternately, depending on the setting. T X S t a t u s 0 1 B A S E B A S E B A S E w Push [P4] (Moni(Audi)) to return to the standby condition. NOTE: Only the calling station ID (or text) is displayed (no message is displayed alternately) when the scroll timer is set to OFF. In this case, push [Status Up]/[Status Down]

to display the status message manually. nately, depending on the setting. appears Appears S D M 8 B A S E B A S E B A S E w When the received SDM includes more than 12 charac-

appears and the message scrolls automatically, ters, when the automatic scroll function is activated. Push [Status Up]/[Status Down] to scroll the message manually. e Push [P4] (Moni(Audi)) to return to the standby condition. 18

!IC-F1721D.qxd 04.9.2 5:58 PM Page 19 (1,1) BIIS OPERATION 3 DDReceived message selection The transceiver memorizes the received messages for record. Up to 6 messages for status and SDM, or 95 charac-

ter SDMs can be memorized. The oldest message is erased when the 7th message is received. However, once the trans-

ceiver is powered OFF, all messages are cleared. r Push [P1] (Digital) for 1 sec. again to return to the standby condition. When no operation is performed for 30 sec., the transceiver returns to the standby condition automatically. q Push [P1] (Digital) for 1 sec. Displays queue memory. w Push [P1] (Digital) momentarily. Displays message memory. When a message is available M E S S A G E

- M S G ! -

When no message is available M E S S A G E

- N O M S G -

e Push [Up] or [Down], or rotate [DIAL] to select the desired message. When selecting the SDM that includes more than 12 characters, appears and the message scrolls automatically, when the automatic scroll function is activated. Push [Status Up]/[Status Down] to scroll the message manually. 19

!IC-F1721D.qxd 04.9.2 5:58 PM Page 20 (1,1) 3 BIIS OPERATION I Transmitting a status DDGeneral The status message can be selected with the programmed text, and the message text is also displayed on the function display of the called station. Up to 24 status types (1 to 24) are available, and the status messages 22 and 24 have designated meanings. Status 22: Emergency*

Status 24: GPS request

*The status 22 can also be used as a normal status message by disabling the designated meaning. However, the status 24 is xed. The status call can be sent with both individual and group calls. DDTransmitting a status q While in the standby condition, push [P1] (Digital), then push [Up] or [Down], or rotate [DIAL] to select the desired station/group code. w Push [P1] (Digital) again, then push [UP] or [DOWN] to select the desired status message. Or, you can select the desired status message using

[Status Up]/[Status Down] key directly. T X S t a t u s 0 1 Status message is displayed. e Push [P0] (Call) or [PTT]* to transmit the status message to the selected station/group.

*PTT call can be made only when PTT call capability is permitted. 2 beeps will sound and the transceiver returns to the standby condition automatically when the transmission is successful. 20

!IC-F1721D.qxd 04.9.2 5:58 PM Page 21 (1,1) BIIS OPERATION 3 I Transmitting an SDM (Short Data Message) DDGeneral The short data message, SDM, can be sent to an individual station or group stations. Also, 8 SDM memory channels are available and the messages can be edited via PC program-

ming. DDTransmitting an SDM q While in the standby condition, push [P1] (Digital), then push [Up] or [Down] or rotate [DIAL] to select the desired station/group code. w Push [P1] (Digital) again, then push [Up] or [Down] or rotate [DIAL] to select the desired SDM. Or, you can select the desired SDM using [Status Up]/

[Status Down] key directly. Appears S D M 8 SDM is displayed. e Push [P0] (Call) or [PTT]* to transmit the SDM to the selected station/group.

*PTT call can be made only when PTT call capability is permitted. 2 beeps will sound and the transceiver returns to the standby condition automatically when the transmission is successful. 21

!IC-F1721D.qxd 04.9.2 5:58 PM Page 22 (1,1) 3 BIIS OPERATION DDProgramming an SDM memory

(IC-F1821/D or IC-F2821/D only) q During standby condition, push [P1] (Digital) twice, then push [Up] or [Down], or rotate [DIAL] to select the desired SDM to be edited. w Push [M] or [#] to enter the message editing condition. The rst character blinks when [#] is pushed, the last character blinks when [M] is pushed as below. Blinks S D M 8 When [#] is pushed. e Push the appropriate digit key, [0] to [9], to enter the desired character. See the table at right for the available characters. Pushing [UP] also enters space, pushing [DOWN] deletes the selected character. r Push [#] to move the cursor to the right, push [M] to move the cursor to the left. t Repeat steps e and r to set the desired text message. y Push [P1] (Digital) for 1 sec. to overwrite the set content into the memory. Push [P1] (Digital) momentarily to cancel the editing and return to the original message indication. 22 Available characters Key

[0]

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

Characters 0 ! ? ' " , ; : _ ( ) < > [ ]

1 (space) # * / + - = & % $ @ ^

2 A B C a b c 3 D E F d e f 4 G H I g h i 5 J K L j k l 6 M N O m n o 7 P Q R S p q r s 8 T U V t u v 9 W X Y Z w x y z NOTE: Once the pre-programmed character including a decimal point is rewrote with the 10-keypad, the decimal point cannot be displayed again.

!IC-F1721D.qxd 04.9.2 5:58 PM Page 23 (1,1) I Position data transmission When the optional cable and a GPS receiver is connected to the transceiver, the position (longitude and latitude) data can be transmitted automatically. Ask your dealer or system operator for connection details. The position data is transmitted when;

Status 24 message is received

*When the status 24 message, GPS request, is received. Fully automatic When automatic position transmission is enabled, send the position data according to Time Marker and Interval Timer settings. PTT is released When Send with Logoff is enabled.

-Set the Log-In/Off item as L-OFF. After sending a status message When Send with Status is enabled. After sending an SDM When Send with SDM is enabled. After sending status 22 (Emergency) When Send with Emergency is enabled. I Printer connection When the optional cable is connected to the transceiver, a printer can be connected to print out the received SDM con-

tent and the ID of the station who sent the message. Ask your dealer or system operator for connection details. BIIS OPERATION 3 I Digital ANI The own ID can be transmitted each time the PTT is pushed

(log-in) or released (log-off) during individual or group call communications. By receiving the ANI, the communication log can be recorded when using a PC dispatch application. In addition, when using the ANI with log-in, the PTT side tone function can be used to inform you that the ID is sent and voice communication can be performed. I Auto emergency transmission When [Emergency Single (Silent)] or [Emergency Repeat

(Silent)] is pushed, an emergency signal is automatically transmitted for the specied time period. The status 22 (Emergency) is sent to the selected ID station, and the position data is transmitted after the emergency sig-

nal when a GPS receiver is connected to the transceiver. The emergency transmission is performed on the emergency channel, however, when no emergency channel is specied, the signal is transmitted on the previously selected channel. There is no change in the function display or beep emission during automatic emergency transmission. 23

!IC-F1721D.qxd 04.9.2 5:58 PM Page 24 (1,1) 3 BIIS OPERATION I Stun function When the specied ID, set as a killer ID, is received, the stun function is activated. I Priority A channel selection When one of the following operations is performed, the trans-

ceiver selects the Priority A channel automatically. When the killer ID is received, the transceiver switches to the password required condition. Entering of the password via the keypad is necessary to operate the transceiver again in this case. I BIIS indication The following indications are available for the BIIS operation on an MSK channel. CONNECT : Individual/group call is successful. OK

: Message (status or SDM) transmission is suc-

cessful. FAILED : No answer back is received. WAIT CLR DOWN : End the communication. BUSY

: Appears during retry of the call (2nd call).

: Operating channel is in the busy condition. Priority A is selected when;

Clear down signal is received/transmitted

- Set the Move to PrioA CH item as Clear down. Turning the power ON The Priority A channel is selected each time the transceiv-

er power is turned ON. Status call The Priority A channel is selected when transmitting a sta-

tus call.

- Enable the Send Status on PrioA CH item in the MSK conguration. I Horn output Automatic honking function is available when the optional OPC-617 ACC CABLE is connected. When a status message is received, the transceiver controls the vehicles horn for the specied time period to inform a status message is received. This function is convenient when the operator away from the transceiver. Ask your dealer or system operator, or refer to the service manual for connection and setting details. 24

!IC-F1721D.qxd 04.9.2 5:58 PM Page 25 (1,1) CONNECTION AND MAINTENANCE 4 I Rear panel and connection Antenna q ANTENNA CONNECTOR Connects to an antenna. Contact your dealer about antenna selection and placement. w Reserved for future function. e EXTERNAL SPEAKER JACK Connect a 48 external speaker. Supplied speaker SP-22

(Depending on version) q w e r y DC POWER RECEPTACLE Connects to a 12 V DC battery. Pay atten-

tion to polarities. NEVER connect to a 24 V battery. This could damage the transceiver. Red 12V Battery y t Black R CAUTION! NEVER remove the fuse-holder from the DC power cable. NOTE: Use the terminals as shown below for the cable connections. Crimp Solder r MICROPHONE HANGER Connect the supplied mi-

crophone hanger to the vehicle s ground for mi-

crophone on/off hook functions. (See p. 2) t OPTIONAL CABLE

(OPC-617) Connect an external mo-

dem unit, dimmer control, etc. 25

!IC-F1721D.qxd 04.9.2 5:58 PM Page 26 (1,1) 4 CONNECTION AND MAINTENANCE I Supplied Accessories q w e r t KEY-STICKER y i u o

!0

!1

!2

!3

!4 q Microphone ...................... 1 w Microphone hanger and screw set ..................... 1 set e Microphone hanger cable . 1 r DC power cable (OPC-1194)

............................................1 t Function name stickers

(KEY STICKER) ....................1 y Speaker* ........................... 1 u Mounting bracket .............. 1 i Key cap ............................. 1 o Flat washers ...................... 4

!0 Spring washers ................. 4

!1 Nuts ................................... 4

!2 Bracket bolts ..................... 4

!3 Mounting screws (M512) . 4

!4 Self-tapping screws (M520)

........................................... 4

*Depending on version 26 Function name stickers There are no names on the programmable function keys since the functions can be freely assigned to these keys. Attach the supplied function name stickers as at right to the appro-

priate keys for easy recognition of that keys assigned function. Then, protect the attached stickers from unsticking with the supplied key cap as below. Function name sticker Key cap

!IC-F1721D.qxd 04.9.2 5:58 PM Page 27 (1,1) I Mounting the transceiver The universal mounting bracket supplied with your transceiv-

er allows overhead mounting. Mount the transceiver securely with the 4 supplied screws to a thick surface which can support more than 1.5 kg. Flat washer Spring washer When using self-tapping screws CONNECTION AND MAINTENANCE 4 I Optional UT-111 installation Install the optional UT-111 unit as follows:

q Turn the power OFF, then disconnect the DC power cable. w Unscrew the 4 cover screws, then remove the bottom cover. e Cut the pattern on the PCB at the CP57, then solder CP58 as shown below. r Install the unit as shown in the diagram below. t Replace the bottom cover and screws, then re-connect the DC power cable. r e CP57 CP58 See p. 28 when unin-

stalling the unit. 27

!IC-F1721D.qxd 04.9.2 5:58 PM Page 28 (1,1) 4 CONNECTION AND MAINTENANCE I Optional UT-109 or UT-110 installation I Optional OPC-617 installation Install the OPC-617 as shown below. q Turn the power OFF, then disconnect the DC power cable. w Unscrew the 4 cover screws, then remove the bottom cover. e Cut the pattern on the PCB at the TX mic circuit (MIC) and RX AF circuit (AF OUT), then solder CP37 as shown below. r Install the scrambler unit as described in the installation of optional UT-111 installation on p. 27 t Replace the bottom cover and screws. MIC and AF OUT FRONT FRONT CP37 Re-solder Un-solder Remove NOTE: When uninstalling the unit Be sure to re-solder the disconnected points and un-solder the connected points as above when you remove the unit. Otherwise no TX modulation or AF output is available. 28 OPC-617 Cut off the bushing as in the illustration, when you install the optional OPC-617. OPTIONAL CABLE PIN ASSIGNMENT t r e w q o i u y q Dimmer cont. IN or IGSW cont. IN w AF OUT e Det. AF OUT r Mod. IN t PTT control IN or FTSW control IN y Horn drive cont. OUT u AF GND i Det. AF GND o Mod. GND

!IC-F1721D.qxd 04.9.2 5:58 PM Page 29 (1,1) I Antenna A key element in the performance of any communication sys-

tem is an antenna. Contact your dealer about antennas and the best places to mount them. I Fuse replacement A fuse is installed in the supplied DC power cable. If a fuse blows or the transceiver stops functioning, track down the source of the problem if possible, and replace the damaged fuse with a new rated one. Fuse rating: 20 A I Cleaning If the transceiver becomes dusty or dirty, wipe it clean with a soft, dry cloth. AVOID the use of solvents such as benzene or alcohol, as they may damage the transceiver sur-

faces. CONNECTION AND MAINTENANCE 4 I Options RMK-2 SEPARATION KIT +

OPC-607/OPC-608/OPC-609 SEPARATION CABLE Allows you to install the transceiver main unit separately from the front panel for operating convenience. SP-5/SP-22 EXTERNAL SPEAKER Input impedance : 4 Max. input power : 5 W SP-5 SP-22 : Compact and easy-to-install. The same as supplied

: Large speaker for good audio quality. with the transceiver depending on version. HM-100TN/HM-100N/HM-148 HAND MICROPHONE HM-100TN : Hand microphone with a DTMF keypad. HM-148

: The same as supplied with the transceiver depending on version. SM-25 DESKTOP MICROPHONE UT-109 (#02)/UT-110 (#02) SCRAMBLER UNITS Non-rolling type (UT-109)/Rolling type (UT-110) voice scrambler unit provides higher communication security. UT-111 TRUNKING BOARD Provides trunking operation. OPC-617 ACC CABLE Allows you to connect to an external terminal. 29

!IC-F1721D.qxd 04.9.2 5:58 PM Page 30 (1,1) 5 SAFETY TRAINING INFORMATION Your Icom radio generates RF electromagnetic energy during transmit mode. This radio is designed for and classied as Occupational Use Only, meaning it must be used only during the course of employment by individuals aware of the hazards, and the ways to minimize such hazards. This radio is NOT intended for use by the General Population in an uncontrolled environment. W ARNING For compliance with FCC and Industry Canada RF Exposure Requirements, the transmitter antenna installation shall comply with the following two conditions:

1. The transmitter antenna gain shall not exceed 0 dBi. 2. IC-F1721/IC-F1721D/IC-F1821/IC-F1821D:

The antenna is required to be located outside of a vehicle and kept at a distance of 1 meter or more between the transmitting antenna of this device and any persons during operation. For small vehicle as worst case, the antenna shall be located on the roof top at any place on the centre line along the vehicle in order to achieve 1 meter separation distance. In order to ensure this distance is met, the installation of the antenna must be mounted at least 1 meter away from the nearest edge of the vehicle in order to protect against exposure to bystanders. 3. IC-F2721/IC-F2721D/IC-F2821/IC-F2821D:

The antenna is required to be located outside of a vehicle and kept at a distance of 79 centimeters or more between the trans-

mitting antenna of this device and any persons during operation. For small vehicle as worst case, the antenna shall be located on the roof top at any place on the centre line along the vehicle in order to achieve 79 centimeters separation distance. In order to ensure this distance is met, the installation of the antenna must be mounted at least 79 centimeters away from the nearest edge of the vehicle in order to protect against exposure to bystanders. 30 To ensure that your exposure to RF electromag-

netic energy is within the FCC allowable limits for occupational use, always adhere to the fol-

lowing guidelines:

CAU TION DO NOT operate the radio without a proper antenna attached, as this may damage the radio and may also cause you to exceed FCC RF exposure limits. A proper antenna is the antenna supplied with this radio by the manufacturer or an antenna specically authorized by the manufacturer for use with this radio. DO NOT transmit for more than 50% of total radio use time (50%

duty cycle). Transmitting more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded. The radio is transmitting when the TX indicator lights red. You can cause the radio to transmit by pressing the PTT switch. Electromagnetic Interference/Compatibility During transmissions, your Icom radio generates RF energy that can possibly cause interference with other devices or systems. To avoid such interference, turn off the radio in areas where signs are posted to do so. DO NOT operate the transmitter in areas that are sensitive to electromagnetic radiation such as hospitals, aircraft, and blasting sites.

!IC-F1721D.qxd 04.9.2 5:58 PM Page Z (1,1) A-6406H-1EX Printed in Japan 2004 Icom Inc. 1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan