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USERS MANUAL | Users Manual | 5.76 MiB | / August 04 2013 | |||
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1 2 | USERS MANUAL | Users Manual | 5.76 MiB | / August 04 2013 |
VHF FM TRANSCEIVER FT-252 Operating Manual YAESU MUSEN CO., LTD. Tennozu Parkside Building 2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 Japan YAESU USA 6125 Phyllis Drive, Cypress, CA 90630, U.S.A. YAESU UK Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K. YAESU HK Unit 2002, 20/F, 9 Chong Yip Street, Kwun Tong, Kowloon, Hong Kong FCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Contents Scanning ............................................................29 VFO Scanning ...............................................30 Manual VFO Scan .....................................30 Programmed VFO Scan .............................30 Memory Scanning ..........................................31 How to Skip (Omit) a Channel during Memory Scan Operation ................31 Preferential Memory Scan .........................32 Memory Bank Scan ...................................33 Programmable (Band Limit) Memory Scan
(PMS) .............................................................34 Priority Channel Scanning
(Dual Watch) ..................................................35 Automatic Lamp Illumination on Scan Stop ..................................................37 Band Edge Beeper .........................................37 Weather Alert Scan ........................................38 Emergency Channel Operation ......................39 Smart Search Operation ..................................40 ARTS (Automatic Range Transponder System) ........41 DTMF Operation .............................................44 Miscellaneous Settings .....................................47 Password ........................................................47 Changing the Channel Steps ..........................48 Receive Battery Saver Setup .........................48 TX Battery Saver ...........................................49 Transmitter Time-Out Timer (TOT) ..............49 Busy Channel Lock-Out (BCLO) ..................50 DCS Code Inversion ......................................50 Changing the TX Deviation Level .................51 Reset Procedures ..............................................52 Set Mode ...........................................................53 Specifications ....................................................63 General Description ...........................................1 Accessories & Options .......................................2 Controls & Connections ....................................3 Top & Front Panel ...........................................3 LCD .................................................................4 Installation of Accessories .................................5 Antenna Installation .........................................5 Installation of FNB-124LI Battery Pack..........5 Battery Charging ..............................................6 Low Battery Indication ....................................6 Belt Clip Installation ........................................7 Operation ............................................................8 Switching Power On and Off ...........................8 Adjusting the Audio Volume Level .................8 Squelch Adjustment .........................................8 Frequency Navigation ......................................9 Transmission ..................................................10 Advanced Operation ........................................11 Keyboard Locking .........................................11 LCD Illumination...........................................12 Disabling the Keypad Beeper ........................12 RF Squelch.....................................................13 Checking the Battery Voltage ........................13 Repeater Operation..........................................14 Repeater Shifts ...............................................14 Automatic Repeater Shift (ARS) ...................14 Manual Repeater Shift Activation .................15 CTCSS/DCS Operation ...................................17 CTCSS Operation ..........................................17 DCS Operation...............................................18 Tone Search Scanning ....................................19 CTCSS/DCS Bell Operation..........................20 Split Tone Operation ......................................21 Tone Calling (1750 Hz) .................................21 Memory Mode ..................................................22 Memory Storage ............................................22 Storing Independent Transmit Frequencies (Odd Split) ..........22 Memory Recall ..............................................23 HOME Channel Memory ..............................23 Labeling Memories ........................................24 Memory Offset Tuning ..................................25 Deleting Memories ........................................26 Memory Bank Operation ...............................26 Moving Memory Data to the VFO ................27 Memory Only Mode ......................................27 Weather Broadcast Channels .........................28 FCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. General Description The FT-252 is a compact, high-performance FM hand-held providing up to five watts of RF power and wealth of convenient features for the 2-meter amateur band. Additional features include a transmit Time-Out Timer (TOT), Automatic Power-Off
(APO), Automatic Repeater Shift (ARS), YAESUs exclusive ARTS (Auto-Range Transponder System) which beeps the user when you move out of communications range with another ARTS equipped station. And an RF squelch circuit allows the owner to set the squelch to open at a programmable setting of the S-Meter, thus reduc-
ing guesswork in setting the squelch threshold. We appreciate your purchase of the FT-252, and encourage you to read this manual thoroughly, so as to learn about the many exciting features of your exciting new YAESU hand-held transceiver!
1 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Accessories & Options Supplied Accessories 7.4 V Rechargeable Lithium-Ion Battery Pack Antenna AC Wall Charger (100 - 120 VAC, Typ-A plug) Charger Cradle FNB-124LI YHA-75 SAD-11B CD-57 Belt Clip Operating Manual Warranty Card Available Options FNB-124LI SAD-11B/C/U CD-57 CN-3
: B suffix is for use with 100-120 VAC, C and U suffix is for use with 230-240 7.4 V Rechargeable Lithium-Ion Battery Pack AC Wall Charger Charger Cradle BNC-to-SMA Adapter VAC. Availability of accessories may vary. Some accessories are supplied as standard per lo-
cal requirements, while others may be unavailable in some regions. This product is de-
signed to perform optimally when used with genuine YAESU accessories. YAESU shall not be liable for any damage to this product and/or accidents such as fire, leakage or explosion of a battery pack, etc., caused by the malfunction of non- YAESU accessories. Consult your YAESU dealer for details regarding these and any newly-available options. Connection of any non-YAESU-approved accessory, should it cause damage, may void the Limited Warranty on this apparatus. 2 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Controls & Connectors Antenna Jack Connect the supplied rubber flex antenna (or an-
other antenna presenting a 50-Ohm impedance) here. DIAL Knob The main tuning Dial is used to set the operating frequency, and is also used for menu selections and other adjustments. The internal speaker is located here. Speaker PTT (Push To Talk) Switch Press this switch to transmit, and release it (to receive) after your transmission is completed. The display shows the current operating conditions, as described on the next page. These 9 keys select many of most important operating features on the FT-252. LCD (Liquid Crystal Display) Keypad MIC The internal microphone is located here. EXT DC Jack This coaxial DC jack allows connection to an external DC power source (5-10V DC). The center pin of this jack is the Positive (+) connection. Do not allow the FT-
252 to become sub-
merged in water while the rubber cap over the EXT DC jack is removed. 3 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Controls & Connectors (LCD) Skip Memory Channel or Pref-
erential Memory Channel Memory Channel Number Repeater Shift Direction CTCSS/DSC Operation Priority Channel Memory Bank Active Operating Frequency BUSY Indicator TX Indicator Bell Alarm Active Automatic Power-Off Active Key Lock Active Battery Indicator Low TX Power Selected Battery Saver Active Secondary Keypad Active Dual Watch Active DTMF Autodial Active S- & PO Meter 4 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Installation of Accessories Antenna Installation The supplied antenna provides good results over the entire frequency range of the trans-
ceiver. However, for enhanced reception on certain non-Amateur frequencies, you may wish to connect an antenna designed specifically for that fre-
quency range, as the supplied antenna is necessarily a com-
promise outside the Amateur band, and cannot be expected to provide high performance at all frequencies. To install the supplied antenna, hold the bottom end of the an-
tenna, then screw it onto the mating connector on the transceiv-
er until it is snug. Do not over-tighten by use of extreme force. Notes:
Never transmit without having an antenna connected. When installing the supplied antenna, never hold the upper part of the antenna while screwing it onto the mating connector on the transceiver. If using an external antenna for transmission, ensure that the SWR presented to the transceiver is 1.5:1 or lower, to avoid excessive feedline loss. Installation of FNB-124LI Battery Pack The FNB-124LI is a high performance Li-ion battery providing high capacity in a compact package. Recharging can be provided while the pack is installed inside the FT-252. Installation of the battery is easy and quick:
Open the Battery Cover Latch on the Battery Cover, then remove the Battery Cover from the radio while pulling the top side of the Battery Cover. Connect the 3-pin connector from the Battery pack to the battery jack on the transceiver. Install the FNB-124LI Battery Pack into the radio. Install the Battery Cover by carefully aligning the two tabs on the bottom of the cover with the slots on the radio, then gently press the top side of the Battery Cover. Confirm that a Rubber Gasket of the Battery Cover is installed correctly. Close the Battery Cover Latch until it locks in place with a Click. Caution:
To insure the FT-252 will not have a problem with water intrusion, make sure the battery cover is properly installed and the battery latch is closed. 5 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Installation of Accessories Battery Charging If the battery has never been used, or its charge is depleted, it may be charged by con-
necting the SAD-11B Overnight Battery Charger, as shown in the illustration, to the EXT DC jack. If only 12 ~ 16 Volt DC power is available, the optional E-DC-5B DC Cable (with its cigarette lighter plug) or E-DC-6 DC Cable (plug and wire only) may also be used for charging the battery. The display will blink CHG.ING, while the battery is being charged. When charging is finished, the CHG.ING disappears in the display. A fully-discharged pack will be charged completely in 5 hours. Disconnect the SAD-
11B from the EXT DC jack and the AC line outlet. Important Note The SAD-11B is not designed to power the transceiver for operation (reception or transmission). Please be advised that the SAD-11B may contribute noise to TV and radio reception in the immediate vicinity, so we do not recommend its use adjacent to such devices. Low Battery Indication icon appears, it is recommended that you charge the battery soon. icon will appear on the display. When the battery charge is almost depleted, a When the No Icon: Enough Battery Power
: Lower Battery Power
(Blinking): Prepare to charge (or replace) the Battery 6 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Installation of Accessories Belt Clip Installation / Removal To install the Belt Clip:
Align the Belt Clip to the groove above the Battery compartment, then press the Belt Clip downward until it locks in place with a Click. To remove the Belt Clip:
Press the Belt Clip tab away from the transceiver to unlock the Belt Clip, then slide the Belt Clip up-ward to re-
move it. Belt Clip Tab 7 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Operation Switching Power ON and OFF Be sure the Battery Pack is installed, and that the battery is fully charged. Connect the antenna to the top panel ANTENNA jack. Press and hold the [POWER] key for two seconds to turn on the radio The current DC supply voltage will be indicated on the display for 2 seconds. After this 2 second interval, the display will resume its normal indication of the operating frequency. To turn the radio off, press and hold the [POWER] key for two seconds. Adjusting the Audio Volume Level Press the [VOL/SQL] key to enter the receiver audio adjustment mode. When VOL is displayed, rotate the DIAL knob or press the [p]/[q] key until the noise or audio from the speaker is at a comfortable level. Squelch Adjustment Press the [VOL/SQL] key twice to enter the squelch level adjustment mode. When LVL is displayed, rotate the DIAL knob or press the [p]/[q] key to set the Squelch so that the backgroundnoise is just silenced. This state is known as the Squelch Threshold. 1) A special RF Squelch feature is provided on this radio. This feature allows you to set the squelch so that only signals exceeding a certain S-meter level will open the squelch. See page 13 for details. 2) If youre operating in an area of high RF pollution, you may need to consider Tone Squelch operation using the built-in CTCSS Decoder. This feature will keep your radio quiet until a call is received from a station sending a carrier which contains a matching (subaudible) CTCSS tone. Or, if your friends have radios equipped with DCS (Digital Coded Squelch) like your FT-252 has, try using that mode for silent monitoring of busy channels. 8 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Operation Frequency Navigation The FT-252 will initially be operating in the VFO mode, a channelized system which allows free tuning throughout the operating band. Two basic frequency navigation methods are available on the FT-252:
1) Tuning Dial Rotation of the DIAL allows tuning in the pre-programmed steps established for the operating band. Clockwise rotation of the DIAL causes the FT-252 to be tuned toward a higher frequency, while counter-clockwise rotation will lower the operating frequency. If you press the [F/W] key momentarily, then rotate the DIAL, frequency steps of 1 MHz will be selected. This feature is extremely useful for making rapid frequency excursions over the wide tuning range of the FT-252. 2) Scanning Press and hold in either the [p] or [q] key for one second to initiate upward or down-
ward scanning, respectively (Manual VFO Scan). If you wish to reverse the direction of the scan (i.e. toward a lower frequency, instead of a higher frequency), just rotate the DIAL one click in the counter-clockwise direc-
tion while the FT-252 is scanning. The scanning direction will be reversed. To revert to scanning toward a higher frequency once more, rotate the DIAL one click clockwise. The scanner will stop when it receives a signal strong enough to break through the Squelch threshold. The FT-252 will then hold on that frequency according to the setting of the RESUME mode (Set Mode Item 31: RESUME). Press the PTT switch momen-
tarily to cancel the scanning. This only stops the scan; it does not cause transmission to occur. See page 29 for details regarding Scan Operation. 9 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Operation Transmission Once you have set up an appropriate frequency inside the 144 MHz Amateur band on which the FT-252 can transmit, youre ready to go on the air! These are the most basic steps; more advanced aspects of transmitter operation will be discussed later. To transmit, press the PTT switch, and speak into the front panel microphone (located in the lower right-hand corner of the speaker grille) in a normal voice level. The TX indicator will appears on the LCD during transmission. To return to the receive mode, release the PTT switch. During transmission, the relative power level will be indicated on the bar graph at the bottom of the LCD; full scale deflection confirms High Power operation, while deflection of two bars indicates Low Power operation. Six bars indicate Medium Pow-
er operation. Additionally, the LOW icon will appear at the display while operating on the Low Power and Medium Power settings. 1) If youre just talking to friends in the immediate area, youll get much longer battery life by switching to Low Power operation, described in the next chapter. And dont forget: always have an antenna connected when you transmit. 2) Transmission is possible only on the 144 MHz amateur band. Low Power Mid Power Changing the Transmitter Power Level To change the power level:
Press the [H/L] key. The LCD shows the current power output level. Rotate the DIAL knob or press the [p]/[q] key to select the desired power output level. Available selections are HIGH (5 W), MID (2 W), and LOW (0.5 W). When you have made your choice, press the PTT switch to save the new setting and HigH Power return to normal operation. 1) The FT-252 is smart! When you store memories, you can store the power output settings separately in each memory, so you dont waste battery power when using very close-in repeaters!
2) When you are operating on the Low or Medium power setting, you can press the [F/W] key, then press the PTT switch, to cause the FT-252 to transmit (tem-
porarily) on High power. After one transmission, the power level will revert to the previously-selected (Low or Medium power) setting. 10 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Advanced Operation Now that youre mastered the basics of FT-252 operation, lets learn more about some of the really neat features. Keyboard Locking icon will appear on the LCD. To cancel locking To activate the locking feature, prees the [F/W] key, then press the [POWER] key. The prees the [F/W] key, then press the [POWER] key. In order to prevent accidental frequency change or inadver-
tent transmission, various aspects of the FT-252s DIAL and keypad may be locked out. You may change the lockout combinations. To lock out some or all of the keys:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 24: LOCK. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to the desired locking scheme as listed below:
LK KEY: Just the front panel keypad is locked out LKDIAL: Just the top panel DIAL is locked out LK K+D: Both the keypad and DIAL are locked out (factory default) LK PTT: The PTT switch is locked out (TX not possible) LK P+K: Both the PTT switch and keypad are locked out LK P+D: Both the PTT switch and DIAL are locked out LK ALL: All of the above are locked out 5. When you have made your selection, press the PTT switch to save the new setting and return to normal operation. 11 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Advanced Operation LCD Illumination Your FT-252 includes a reddish illumination lamp which aids in nighttime operation. The reddish illumination yields clear viewing of the display in a dark environment, with minimal degradation of your night vision. Three options for activating the lamp are provided:
KEY Mode:
Illuminates the LCD lamp for five seconds when you rotate the DIAL knob or press the keypad or any switch (except PTT switch). This is the factory-programmed default setting. CONT Mode: Illuminates the LCD lamp continuously. OFF Mode: Disables the LCD lamp. Here is the procedure for setting up the Lamp operating mode:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 23: LAMP. 3. Press the [F/W] key momentarily to enable adjustment of this Item. scribed above. 4. Rotate the DIAL knob or press the [p]/[q] key to select one of the three modes de-
5. When you have made your choice, press the PTT switch to save the new setting and return to normal operation. Disabling the Keypad Beeper A keypad beeper provides useful audible feedback whenever a keypad is pressed. If you want to turn the beep off:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 9: BEEP. 3. Press the [F/W] key momentarily to enable adjustment of 4. Rotate the DIAL knob or press the [p]/[q] key to change the setting to OFF. 5. Press the PTT switch to save the new setting and return to normal operation. 6. To turn the beep back on again, select KEY or KEY+SC (factory default) in step this Item. 4 above. KEY: The beeper sounds when you press the keypad. KEY+SC: The beeper sounds when you press the keypad, or when the scanner stops. 12 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Advanced Operation RF Squelch A special RF Squelch feature is provided on this radio. This feature allows you to set the squelch so that only signals exceeding a certain S-meter level will open the squelch. To set up the RF squelch circuit for operation, use the following procedure:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 33: RF SQL. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired signal strength level for the squelch threshold (S-1, S-2, S-3, S-4, S-5, S-7, S-FULL, or OFF). 5. Press the PTT switch to save the new setting and return to normal operation. Checking the Battery Voltage The FT-252s microprocessor includes programming which will measure the current battery voltage. 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to to se-
lect Set Mode Item 14: DC VLT. 3. Press the [F/W] key momentarily to display the current DC voltage being supplied. 4. Press the [F/W] key, followed by the PTT switch to return to normal operation. 13 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Repeater Operation Repeater stations, usually located on mountaintops or other high locations, provide a dramatic extension of the communication range for low-powered hand-held or mobile transceivers. The FT-252 includes a number of features which make repeater operation simple and enjoyable. Repeater Shifts The FT-252 has been configured, at the factory, with the repeater shift set to 600 kHz. Depending on the part of the band in which you are operating, the re-
peater shift may be either downward
() or upward (+), and one of these icons will appear at the top of the LCD when repeater shifts have been enabled. Automatic Repeater Shift (ARS) The FT-252 provides a convenient Automatic Repeater Shift feature, which causes the appropriate repeater shift to be applied automatically whenever you tune into the desig-
nated repeater sub-bands in your country. These sub-bands are shown below. If the ARS feature does not appear to be working, you may have accidentally disabled it. To re-enable ARS:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 6: ARS. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select ARS. ON. 5. When you have made your selection, press the PTT switch to save the new setting and return to normal operation. 14 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Repeater Operation Manual Repeater Shift Activation If the ARS feature has been disabled, or if you need to set a repeater shift direction other than that established by the ARS, you may set the direction of the repeater shift manually. To do this:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 34: RPT.MOD. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired shift among 5. When you have made your selection, press the PTT switch to save the new setting RPT., RPT.+, and RPT.OFF. and return to normal operation. If you make a change in the shift direction, but still have Automatic Repeater Shift still engaged (see previous section), when you change frequency (by rotating the DIAL knob, for example) the ARS will over-ride your manual setting of the shift direction. Turn ARS off if you do not wish this to happen. If you make a change in the repeater shift on a memory channel that you already stored, the radio will consider this a temporary change unless you store the memory once more, this time with the desired repeater shift engaged. Changing the Default Repeater Shifts If you travel to a different region, you may need to change the default repeater shift so as to ensure compatibility with local operating requirements. To do this, follow the procedure below:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 30: R SHIFT. 3. Press the [F/W] key momentarily to enable adjustment of 4. Rotate the DIAL knob or press the [p]/[q] key to select the new repeater shift mag-
this Item. nitude. 5. When you have made your selection, press the PTT switch to save the new setting and return to normal operation. If you just have one odd split that you need to program, dont change the default repeated shifts using this Set Mode Item. Enter the transmit and receive frequencies separately, as shown on page 22. 15 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Repeater Operation Manual Repeater Shift Activation Checking the Repeater Uplink (Input) Frequency It often is helpful to be able to check the uplink (input) frequency of a repeater, to see if the calling station is within direct (Simplex) range. To do this, just press the [REV] key. Youll notice that the display has shifted to the repeater uplink frequency. Press the [REV] key again to cause operation to revert to normal monitoring of the repeater downlink (output) frequency. While you are listening on the input frequency to the repeater using the [REV] key, the repeater offset icon will blink. The configuration of this key may be set either to REV (for checking the input fre-
quency of a repeater), or HOME (for instant switching to the Home channel for the band you are operating on). To change the configuration of this key, use Set Mode Item 32: REV/HM. See page 59. 16 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. CTCSS/DCS Operation CTCSS Operation Many repeater systems require that a very-low-frequency audio tone be superimposed on your FM carrier in order to activate the repeater. This helps prevent false activation of the repeater by radar or spurious signals from other transmitters. This tone system, called CTCSS (Continuous Tone Coded Squelch System), is included in your FT-252, and is very easy to activate. 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 42: SQL.TYP. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key so that TONE indication appears on the display; this activates the CTCSS Encoder, for access to repeaters requiring a CTCSS tone. 5. Rotation of the DIAL knob one more click or press the [p]/[q] key one more press in step 4 above will cause the TSQL notation to appear. When TSQL is displayed, this means that the Tone SQuelch system is ac-
tive, which mutes your FT-252s receiver until it receives a call from another radio sending out a matching CTCSS tone. This can help keep your radio quiet until a spe-
cific call is received, which may be helpful while operating in congested areas of the band. 1) You may notice a REV TN indication on the display while you rotate the DIAL knob in this step; this means that the Reverse Tone Squelch system is active, which mutes your FT-252s receiver (instead of opening the squelch) when it receives a call from the radio sending a matched CTCSS tone. The icon will blink on the display when the Reverse Tone Squelch system is activated. 2) You may notice the DCS indications on the display while you rotate the DIAL knob still more. Well discuss the Digital Code Squelch system (for DCS) later. 6. When you have made your selection of the CTCSS tone mode, press the PTT switch to save the new setting. 7. Press the [SET] key to enter the Set mode. 8. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 44: TN FRQ. 9. Press the [F/W] key momentarily to enable adjustment of this Item. 17 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. CTCSS/DCS Operation CTCSS Operation 10. Rotate the DIAL knob until the display indicates the Tone Frequency you need to be using (ask the repeater owner/operator if you dont know the tone frequency). CTCSS TONE FREQUENCY (Hz) 77.0 94.8 69.3 85.4 74.4 91.5 11. When you have made your selection, press the [F/W] key, then press the PTT switch to save the new settings and exit to normal operation. This is differ-
ent than the usual method of restoring normal operation, and it applies only to the configuration of the CTCSS/DCS frequencies. 71.9 88.5 79.7 67.0 82.5 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.1 Your repeater may or may not re-transmit a CTCSS tone - some systems just use CTCSS to control access to the repeater, but dont pass it along when transmitting. If the S-Meter deflects, but the FT-252 is not passing audio, repeat steps 1 through 4 above, but rotate the DIAL so that TSQ disappears - this will allow you to hear all traffic on the channel being utilized. DCS Operation Another form of tone access control is Digital Code Squelch, or DCS. It is a newer, more advanced tone system which generally provides more immunity from false pag-
ing than does CTCSS. The DCS Encoder/Decoder is built into your FT-252, and op-
eration is very similar to that just described for CTCSS. Your repeater system may be configured for DCS; if not, DCS is frequently quite useful in Simplex operation if your friend(s) use transceivers equipped with this advanced feature. Just as in CTCSS operation, DCS requires that you set the Tone Mode to DCS and that you select a tone code. 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 42: SQL.TYP. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key so that DCS indication appears on the display; this activates the DCS Encoder/Decoder. 5. Press the PTT switch to save the new setting. 6. Press the [SET] key to enter the Set mode. 7. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 15: DCS. COD. 18 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. CTCSS/DCS Operation DCS Operation 8. Press the [F/W] key momentarily to enable adjustment of this Item. 9. Rotate the DIAL knob to select the DCS CODE desired DCS Code (a three-digit num-
ber). Ask the repeater owner/operator if you dont know DCS Code; if you are working simplex, just set up the DCS Code to be the same as that used by your friend(s). 023 025 026 031 032 036 043 047 051 053 054 065 071 072 073 074 114 115 116 122 125 131 132 134 143 145 152 155 156 162 165 172 174 205 212 223 225 226 243 244 245 246 251 252 255 261 263 265 266 271 274 306 311 315 325 331 332 343 346 351 356 364 365 371 411 412 413 423 431 432 445 446 452 454 455 462 464 465 466 503 506 516 523 526 532 546 565 606 612 624 627 631 632 654 662 664 703 712 723 731 732 734 743 754 10. When you have made your selection, press the [F/W] key, then press the PTT switch to save the new settings and exit to normal operation. Remember that the DCS is an Encode/Decode system, so your receiver will remain muted until a matching DCS code is received on an incoming transmission. Switch the DCS off when youre just tuning around the band!
Tone Search Scanning In operating situations where you dont know the CTCSS or DCS tone being used by another station or stations, you can command the radio to listen to the incoming signal and scan in search of the tone being used. Two things must be remembered in this re-
gard:
You must be sure that your repeater uses the same tone type (CTCSS vs. DCS). Some repeaters do not pass the CTCSS tone; you may have to listen to the station(s) transmitting on the repeater uplink (input) frequency in order to allow Tone Search Scanning to work. To scan for the tone in use:
1. Set the radio up for either CTCSS or DCS Decoder operation (see the previous dis-
will appear on the display; in the case of will appear on the display. 2. Press the [SET] key to enter the Set mode. 3. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 44: TN cussions). In the case of CTCSS, DCS, FRQ or 15: DCS.COD. 4. Press the [F/W] key, then press and hold in the [p] or [q] key for one second to start scanning for the incoming CTCSS or DCS tone/code. 5. When the radio detects the correct tone or code, it will halt on that tone/code, and audio will be allowed to pass. Press the [F/W] key to lock in that tone/code, then press the [F/W] key again to exit to normal operation. 19 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. CTCSS/DCS Operation If the Tone Scan feature does not detect a tone or code, it will continue to scan indefi-
nitely. When this happens, it may be that the other station is not sending any tone. You can press the PTT switch to halt the scan at any time. Tone Scanning works either in the VFO or Memory modes. CTCSS/DCS Bell Operation During CTCSS Decode or DCS operation, you may set up the FT-252 such that a ring-
ing bell sound alerts you to the fact that a call is coming in. Here is the procedure for activating the CTCSS/DCS Bell:
1. Set the transceiver up for CTCSS Decode (Tone Squelch) or DCS operation, as 6. Rotate the DIAL knob or press the [p]/[q] key to set the desired number of rings of described previously. 2. Adjust the operating frequency to the desired channel. 3. Press the [SET] key to enter the Set mode. 4. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 10: BELL. 5. Press the [F/W] key momentarily to enable adjustment of this Item. the Bell. The available choices are 1 T, 3 T, 5 T, or 8 T rings, CONT (continuous ringing), or OFF. 7. Press the PTT switch momentarily to save the new setting and exit to normal operation. When you are called by a station whose transceiver is sending a CTCSS tone or DCS code which matches that set into your Decoder, the Bell will ring in accordance with this program-
ming. When the CTCSS/DCS Bell is activated, the icon will appear at the upper right corner on the LCD. 20 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. CTCSS/DCS Operation Split Tone Operation The FT-252 can be operated in a Split Tone configuration via the Set mode. 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 41: SPLIT. 3. Press the [F/W] key momentarily to enable adjustment of this Item. Tone feature). 4. Rotate the DIAL knob or press the [p]/[q] key to select ON (to enable the Split 5. Press the PTT switch momentarily to save the new setting and exit to normal operation. When the Split Tone feature is activated, you can see the following additional param-
eters following the DCS parameter (while selecting the tone mode by Set Mode Item 42: SQL.TYP):
icon will appear during operation) DCS Encode only (the D:
T DCS: Encodes a CTCSS Tone and Decodes a DCS code D TSQL: Encodes a DCS code and Decodes a CTCSS Tone
(the icon will blink and the icon will appear and the icon will appear during operation) icon will blink during opera-
(the tion) Select the desired operating mode from the selections shown above. Tone Calling (1750 Hz) If the repeaters in your country require a 1750-Hz burst tone for access (typically in Europe), you can set the [VOL/SQL] key to serve as a Tone Call switch instead. To change the configuration of this switch, we again use the Set Mode to help us. 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 25: M/T-CAL. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select T-CALL on the display. 5. Press the PTT switch to save the new setting and exit to normal operation. To access a repeater, press and hold in the [VOL/SQL] key for the amount of time speci-
fied by the repeater owner/operator. The transmitter will automatically be activated, and a 1750-Hz audio tone will be superimposed on the carrier. Once access to the repeater has been gained, you may release the [VOL/SQL] key for activating the transmitter thereafter. 21 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode The FT-252 provides a wide variety of memory system resources. These include:
200 Standard memory channels, numbered 1 through 200. A Home channel, providing storage and quick recall of one prime frequency. 10 sets of band-edge memories, also known as Programmable Memory Scan chan-
nels, labeled L1/U1 through L10/U10. 10 Memory Banks, labeled BANK 1 through BANK10. Each Memory Bank can be assigned up to 200 channels from the standard memory channels. 10 Weather Broadcast Channels. Memory Storage 1. Select the desired frequency, while operating in the VFO mode. Be sure to set up any desired CTCSS or DCS tones, as well as any desired repeater offset, now. The power level may also be set at this time, if you wish to store it. 2. Press and hold in the [F/W] key for one second. 3. Within ten seconds of releasing the [F/W] key, you need to make a decision regard-
ing channel storage. The microprocessor will automatically select the next-available free channel (a memory register on which no data has been stored), so you may not wish to make any change; if this is the case, proceed to step 4. If you wish to se-
lect a different channel number into which to store the data, rotate the DIAL knob or press the [p]/[q] key to select the desired memory channel. 4. Press the [F/W] key once more to store the frequency into memory. 5. You still will be operating in the VFO mode, so you may now enter other frequen-
cies, and store them into additional memory locations, by repeating the above pro-
cess. Storing Independent Transmit Frequencies (Odd Splits) All memories can store an independent transmit frequency, for operation on repeaters with non-standard shift. To do this:
1. Store the receive frequency using the method already described under MEMORY STORAGE (it doesnt matter if a repeater offset is active). 2. Tune to the desired transmit frequency, then press and hold in the [F/W] key for one second. 3. Within ten seconds of releasing the [F/W] key, rotate the DIAL knob or press the [p]/
[q] key to select the same memory channel number as used in step 1 above. 4. Press and hold in the PTT switch. Then while holding the PTT switch in, momen-
tarily press the [F/W] key once more. (This does not key the transmitter). Whenever you recall a memory which contains independently-stored transmit and re-
ceive frequencies, the indication will appear in the display. 22 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode Memory Recall 1. While operating in the VFO mode, press the [V/M] key to enter the Memory mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select the desired channel. 3. To return to the VFO mode, press the [V/M] key. HOME Channel Memory A special one-touch HOME channel is available, to allow quick recall of a favorite operating frequency. Home Channel storage is simple to accomplish:
1. Change the setting of Set Mode Item 32: REV/HM from REV to HOME, if it is not already set to this option (see page 59). 2. Select the desired frequency, while operating in the VFO mode. Be sure to set up any desired CTCSS or DCS tones, as well as any desired repeater offset. The power level may also be set at this time, if you wish to store it. 3. Press and hold in the [F/W] key for one second. 4. While the memory channel number is blinking, just press the [REV] key. The fre-
quency and other data (if any) will now be stored in the special HOME channel register. 5. To recall the HOME channel, press the [REV] key mo-
mentarily while operating either in the VFO or MR mode. 23 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode Labeling Memories You may wish to append an alpha-numeric Tag (label) to a memory or memories, to aid in recollection of the channels use (such as a club name, etc.). This is easily accom-
plished using the Set Mode. 1. Recall the memory channel on which you wish to append a label. 2. Press the [SET] key to enter the Set mode. 3. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 27: NM WRT. 4. Press the [F/W] key momentarily to display the previously stored label (if any). 5. Press the [F/W] key to clear any previous label. 6. Rotate the DIAL knob to select the first digit of the desired label. 7. Press the [F/W] key to move to the next character. 8. If you make a mistake, press the [q] key to back-space the cursor, then re-enter the correct letter, number, or sym-
bol. 9. Repeat steps 5 through 7 to program the remaining letters, numbers, or symbols of the desired label. A total of six characters may be used in the creation of a label. 10. When you have programmed a label which is under 6 char-
acters, press and hold in the [F/W] key for one second to confirm the label (if the label is exactly 6 characters in length, you do not need to press and hold in [F/W] key). 11. When you have completed the creation of the label, press the PTT switch to save the label and return to the memory recall mode. To enable the alpha-numeric Tag (and disable the frequency display):
1. Set the FT-252 to the MR (Memory Recall) mode, and recall the memory channel on which you wish to enable the alpha-numeric Tag. 2. Press the [SET] key to enter the Set mode. 3. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 26: NAME. 4. Press the [F/W] key momentarily to enable adjustment of this Item. 5. Rotate the DIAL knob or press the [p]/[q] key to set this to ALPHA (enabling the alpha-numeric Tag display). 24 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode 6. To display the frequency again, just repeat the above procedure. 7. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. To display the frequency again, just repeat the above procedure, rotating the DIAL knob or press the [p]/[q] key to select FREQ in step 5 above. This procedure is not applied to all memory channels at once (just the channel on which you currently are operating). Memory Offset Tuning Once you have recalled a particular memory channel, you may easily tune off that chan-
nel, as though you were in the VFO mode. 1. With the FT-252 in the MR (Memory Recall) mode, select the desired memory channel. 2. Press and hold the [REV] key for one second to activate the Memory Tuning fea-
ture. The Memory Channel number will be replaced by tun. And if you have an alpha-numeric Tag displayed on the memory channel, the display will automatically revert to display of the operating frequency, so you can navigate without having to enter the Menu to change the display configuration. 3. Rotate the DIAL knob, as desired, to tune to a new frequency. The synthesizer steps selected for VFO operation will be the steps used during Memory Tuning. 4. If you wish to return to the original memory frequency, just press the [V/M] key mo-
mentarily. The display will revert to display of the alpha-numeric Tag (if any) that may have originally appeared on the LCD. 5. If you wish to store a new frequency set during Memory Tuning, just press and hold in the [F/W] key for one second, per normal memory storage procedure. The micro-
processor will automatically set itself to the next-available clear memory location, and you then press [F/W] again to lock in the new frequency. 1) If you want to replace the original memory contents with those of the new frequen-
cy, be sure to rotate the DIAL knob to the original memory channel number!
2) Any required CTCSS/DCS changes, or repeater offset modifications, must be done before storing the data into the new (or original) memory channel location. 25 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode Deleting Memories You may delete any of the memories (except for Memory Channel 1 and the Home Channel). The procedure for deleting a channel is quite simple. 1. Press the [V/M] key, if needed, to enter the MR mode. 2. Press and hold in the [F/W] key for one second, then rotate the DIAL knob or press the [p]/[q] key to select the memory channel to be deleted. 3. Press the [SET] key momentarily. The display will revert to memory channel #1. The previously-selected memory will be deleted. Important Notice! Once deleted, the channel data cannot be recovered!
Memory Bank Operation The large number of memories available in the FT-252 could be difficult to utilize without some means of organizing them. Fortunately, the FT-252 includes provision for dividing the memories into as many as ten Memory Groups, so you can categorize the memories in a manner convenient to you. Assigning Memories to a Memory Bank 1. Recall the memory channel to be assigned to a Memory Bank. 2. Press and hold in the [V/M] key for one second, then ro-
tate the DIAL knob or press the [p]/[q] key to select the Memory Bank number you want as the Memory Bank for this channel (BANK 1 ~ BANK10). 3. Press and hold in the [F/W] key for one second to copy the memory channel data into the Memory Bank. 1) You may assign one memory channel into multiple Memory Banks. 2) The PMS memory channels (L1/U1 through L10/U10) may not be assigned to a Memory Bank. Memory Bank Recall 1. Press the [V/M] key, if needed, to enter the Memory Recall mode. 2. Press and hold in the [V/M] key, then rotate the DIAL knob or press the [p]/[q] key to select the desired Mem-
ory Bank (BANK 1 through BANK10). 3. Press the [V/M] key momentarily; now, as you rotate the DIAL knob or press the [p]/[q] key to select memories, you will observe that you can only select memory chan-
nels in the current memory bank. The indication will appear at the left side of the frequency display while operating within a Memory Bank. 26 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode 4. To change to another Memory Bank, press and hold in the [V/M] key, rotate the DIAL knob or press the [p]/[q] key to select the new Memory Bank, then press the
[V/M] key momentarily. 5. To exit from Memory Bank operation, select NOBANK in step 4 above. You are now in the standard Memory Recall mode, without utilization of the Memory Banks. The memories stored in the various Banks will remain in those banks, however; you do not need to store them again. Removing Memories from a Memory Bank 1. Recall the memory channel to be removed from a Memory Bank. 2. Press and hold in the [V/M] key for one second, then press and hold in the [F/W] key to remove the memory channel data from the Memory Bank. Moving Memory Data to the VFO Data stored on memory channels can easily be moved to the last selected VFO, if you like. 1. Select the memory channel containing the frequency data to be moved to the VFO. 2. Press and hold the [V/M] key to activate the Memory Tune feature temporarily, then press and hold in the [V/M] key for one second. The data will now have been copied to the last selected VFO, although the original memory contents will remain intact on the previously-stored channel. If a Split Frequency Memory channel was transferred, the TX frequency will be ig-
nored (you will be set up for Simplex operation on the Receive frequency). Memory Only Mode Once memory channel programming has been completed, you may place the radio in a Memory Only mode, whereby VFO operation is impossible. This may be particularly useful during public-service events, where a number of operators may be using the radio for first time, and ultimate simplicity of channel selection is desired. To place the radio into the Memory Only mode:
1. Turn the radio off. 2. Press and hold in the [V/M] key while turning the radio on. 3. Rotate the DIAL knob to select the F5 M-ONLY option, then press the [SET] key. To return to normal operation, repeat the above power-on pro-
cedure. 27 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Memory Mode Weather Broadcast Channels The VHF Weather Broadcast Station Memory Channel Bank has been pre-programmed at the factory, for quick selection of NOAA weather information stations. 1. Press the [F/W] key, then press the [V/M] key to recall the Weather Broadcast Memory Bank. 2. Rotate the DIAL knob or press the [p]/[q] key to select the desired Weather Broadcast channel. 3. If you wish to scan this bank to search for louder stations, just press the PTT switch. When the scanner pauses on a station, press the PTT switch once to halt the scan, or press it twice to restart the scan. CH 01 02 03 04 05 Frequency 162.550 MHz 162.400 MHz 162.475 MHz 162.425 MHz 162.450 MHz CH 06 07 08 09 10 Frequency 162.500 MHz 162.525 MHz 161.650 MHz 161.775 MHz 163.275 MHz 4. To exit to normal operation, press the [V/M] key. Severe Weather Alert In the event of extreme weather disturbances, such as severe thunderstorms and hurri-
canes, the NOAA (National Oceanic and Atmospheric Administration) sends a weather alert accompanied by a 1050 Hz tone and subsequent weather report on one of the NOAA weather channels. See page 38 for details regarding activation of this mode. 28 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning The FT-252 allows you to scan just the memory channels, the entire operating band, or a portion of that band. It will halt on signals encountered, so you can talk to the station(s) on that frequency, if you like. Scanning operation is basically the same in each of the above modes. Before you begin, take a moment to select the way in which you would like the scanner to resume scan-
ning after it halts on a signal. Setting the Scan-Resume Technique Three options for the Scan-Resume mode are available:
BUSY: In this mode, the scanner will halt on a signal it encounters. Two seconds after the carrier has dropped because the other station(s) ceased transmission, the scanner will resume. In the case of constant-carrier signals like Weather Station broadcasts, the scanner will likely remain on this frequency indefinitely. HOLD: In this mode, the scanner will halt on a signal it encounters. It will not restart automatically; you must manually re-initiate scanning if you wish to resume. TIME: In this mode, the scanner will halt on a signal it encounters, and will hold there for five seconds. If you do not take action to disable the scanner within that time period, the scanner will resume even if the stations are still active. To set the Scan-Resume mode:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 31: RESUME. 3. Press the [F/W] key momentarily to enable adjustment of this Item. mode. 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired scan-resume 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. The default condition for this Set Mode Item is TIME. Setting tHe SqueLcH LeveL during Active ScAnning oPerAtion The FT-252 allows adjustment of the Squelch level on the fly while you are scanning. 1. While the scanner is engaged, press the [VOL/SQL] key twice (the current squelch level (e.g. LVL 1) will appear in fine print above the frequency display). 2. Rotate the DIAL knob or press the [p]/[q] key to select the desired Squelch level. 3. Press the PTT switch momentarily to save the new setting and exit to normal operation. In this case, pressing the PTT switch this one time will not causing scanning to stop. 29 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning VFO Scanning The FT-252 provides two VFO scanning functions: Manual VFO Scanning and Pro-
grammed VFO Scanning. Manual VFO Scan 1. Select the VFO mode by pressing the [V/M] key, if necessary. 2. Press and hold in either the [p] or [q] key for one second to initiate upward or downward scanning, respectively. 3. If and when the scanner encounters a signal strong enough to open the squelch, the scanner will halt temporarily; the decimal point of the frequency display will blink during this Pause condition. 4. The scanner will then resume according to the Scan-Resume mode selected in the previous section. 5. To cancel scanning, press the PTT switch or [V/M] key. Programmed VFO Scan 1. Select the VFO mode by pressing the [V/M] key, if necessary. 2. Press and hold the [REV] key, then rotate the DIAL knob or press the [p]/[q] key to select the bandwidth for the Programmed VFO scanner. Available selections are 1 MHz, 2 MHz, 5 MHz, PMS-x, and ALL. 1 MHz, 2 MHz, 5 MHz:
The scanner will sweep frequencies within the selected bandwidth. PMS-x: The scanner will sweep frequencies within the currently-selected PMS frequency pair. See page 34 for details. ALL: The scanner will sweep all frequencies. 3. Press the PTT switch momentarily to save the new setting and exit to normal operation. 4. Press and hold in the [V/M] key for one second to start scanning. 5. If and when the scanner encounters a signal strong enough to open the squelch, the scanner will halt temporarily; the decimal point of the frequency display will blink during this Pause condition. 6. The scanner will then resume according to the Scan-Resume mode selected in the previous section. 7. To cancel scanning, press the PTT switch. When you start the Programmed VFO Scanner, the FT-252 will be changing fre-
quency in the upward direction. If you want to change direction of the scan while it is underway, rotate the DIAL knob one click in the opposite direction (in this case, one click counter-clockwise). Youll see the scanner turn around and change frequency downward!
30 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning Memory Scanning Memory scanning is similarly easy to initiate:
1. Select the Memory mode by pressing the [V/M] key, if necessary. 2. Press and hold in either the [p] or [q] key for one second to initiate upward or downward scanning, respectively. 3. If and when the scanner encounters a signal strong enough to open the squelch, the scanner will halt temporarily; the decimal point of the frequency display will blink during this Pause condition. 4. The scanner will then resume according to the Scan-Resume mode selected in the previous section. 5. To cancel scanning, press the PTT switch. How to Skip (Omit) a Channel during Memory Scan Operation As mentioned previously, some continuous-carrier stations like a Weather Broadcast sta-
tion will seriously impede scanner operation if you are using the Carrier Drop Scan-
Resume mode, as the incoming signal will not pause long enough for the transceiver to resume scanning. Such channels may be Skipped during scanning, if you like:
1. Recall the Memory Channel to be skipped during scanning. 2. Press the [SET] key to enter the Set mode. 3. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 40: SKIP. 4. Press the [F/W] key momentarily enter the Skip channel-selection mode. 5. Rotate the DIAL knob or press the [p]/[q] key so as to select SKIP. The current Memory Channel will now be ignored during scanning. The ONLY selection is used for Preferential Memory Scan, described in the next section. 6. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. When you recall the skipped memory channel manually, a small icon will appear at the left of the memory channel number, indicating it is to be ignored during scanning. To re-institute a channel into the scanning loop, select OFF in step 5 above (the Skipped channel will, of course, still be accessible via manual channel selection methods using the DIAL knob in the MR mode, whether or not it is locked out of the scanning loop). 31 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning Memory Scanning Preferential Memory Scan The FT-252 also allows you to set up a Preferential Scan List of channels which you can flag within the memory system. These channels are designated by a blinking icon when you have selected them, one by one, for the Preferential Scan List. When you initiate memory scanning, beginning on a channel with the blinking icon appended, only those channels bearing the blinking icon will be scanned. If you initiate scanning on a channel which does not have the blinking icon appended, you will scan all channels including those with the blinking icon appended. Here is the procedure for setting up and using the Preferential Scan List:
1. Recall the Memory Channel which you wish to add to the Preferential Scan List. 2. Press the [SET] key to enter the Set mode. 3. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 40: SKIP. 4. Press the [F/W] key momentarily enter the Skip channel-selection mode. 5. Rotate the DIAL knob or press the [p]/[q] key so as to select ONLY. 6. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. 7. To remove a channel from the Preferential Scan List, just repeat the above proce-
dure, rotating the DIAL knob to select OFF in step 5 above. To initiate Preferential Memory Scan:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 38: SCN MD. 3. Press the [F/W] key momentarily to enable adjustment of 4. Rotate the DIAL knob or press the [p]/[q] key so as to 5. Press the PTT switch to save the setting and exit to nor-
this Set Mode Item. select ONLY. mal operation. 6. Now, press and hold in either the [p] or [q] key for one second to initiate the Pref-
erential Memory Scan. Only the channels which have the blinking icon append-
ed to the channel number will be scanned. 7. To cancel the Preferential Memory Scan, just repeat the above procedure, rotating the DIAL knob or press the [p]/[q] key to select MEM in step 4 above. 32 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning Memory Scanning Memory Bank Scan When the Memory Bank feature is engaged, the scanner sweeps only memory channels in the current Memory Bank. However, if the Memory Bank Link Scan feature is en-
abled, you may sweep the memory channels in several Memory Banks which you have selected. To enable the Memory Bank Link Scan feature:
1. Set the radio to the Memory mode by pressing the [V/M] key, if necessary. 2. Press and hold in the [V/M] key for one second, then rotate the DIAL knob or press the [p]/[q] key to select the first Memory Bank (BANK 1 ~ BANK10) you wish to sweep using Memory Bank Link Scan. 3. Press the [F/W] key momentarily. The current Memory Bank will now be swept during Memory Bank Scan. A decimal point will be appended between the N and K of the Memory Bank number indication (such as BAN.K 2). 4. Repeat steps 2 and 3 above, to append the decimal point to any other Memory 5. Now, press and hold in the [p] or [q] key for one second to initiate the Memory Banks you wish to sweep. Bank Link Scan. 6. To remove a Memory Bank from the Memory Bank Link Scan, repeat steps 2 and 3 above, to delete the decimal point from the Memory Bank number indication. 33 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning Programmable (Band Limit) Memory Scan (PMS) This feature allows you to set sub-band limits for either scanning or manual VFO opera-
tion. For example, you might wish to set up a limit (in North America) of 144.300 MHz to 148.000 MHz so as to prevent encroachment into the SSB/CW Weak Signal portion of the band below 144.300 MHz. Heres how to do this:
1. Set the radio to the VFO mode by pressing the [V/M] key, if necessary. 2. Using the techniques learned earlier, store (per the above concept) 144.300 MHz into Memory Channel #L1 (the L designates the Lower sub-band limit). 3. Likewise, store 148.000 MHz into Memory Channel #U1 (the U designates the Upper sub-band limit). 4. Confirm the radio is in the VFO mode, press and hold in the [REV] key for one sec-
ond, and rotate the DIAL knob to select the desired PMS frequency pair (PMSxx), then press the PTT switch. 5. Now, press and hold in the [V/M] key for one second to initiate Programmable (Band Limit) Memory Scan. Scanning will now be limited within the just-programmed range. 6. 10 pairs of Band Limit memories, labeled L1/U1 through L10/U10 are available. You therefore can set upper and lower operation limits in multiple segments on the band, if you like. 34 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Priority Channel Scanning (Dual Watch) Scanning The FT-252s scanning features include a two-channel scanning capability which allows you to operate on a VFO or Memory channel, while periodically checking a user-defined Memory Channel for activity. If a station is received on the Memory Channel which is strong enough to open the Squelch, the scanner will pause on that station in accordance with the Scan-Resume mode set via Set Mode Item 31: RESUME. See page 29. Here is the procedure for activating Priority Channel Dual Watch operation:
VFO Priority 1. Recall the memory channel you wish to use as the Priority frequency. 2. Now, set the radio to the VFO mode by pressing the [V/M] key. 3. Press the [F/W] key, then press the [VOL/SQL] key to activate the VFO Priority mode. The display will remain on the VFO frequency, but every five seconds the radio will check the Priority Channel (memory channel) for activity. 4. Press [F/W] [VOL/SQL] again to disable the VFO Priority mode. Memory Channel Priority 1. Store the frequency you wish to be the Priority Channel into memory channel 1. 2. Now, set the radio for operation on another memory channel. 3. Press the [F/W] key, then press the [VOL/SQL] key to activate the Memory Priority mode. The display will remain on the current memory channel frequency, but every five seconds the radio will check the Priority Channel (memory channel 1) for ac-
tivity. 4. Press [F/W] [VOL/SQL] again to disable the Memory Priority mode. When the Memory Bank feature is activated, the FT-252 will check the lowest num-
bered memory channel in the current Memory Bank as the Priority Channel. HOME Channel Priority 1. Recall the memory channel you wish to use as the Priority frequency. 2. Now set the radio for operation on the HOME channel by pressing the [F/W] key followed by [REV]. 3. Press the [F/W] key, then press the [VOL/SQL] key to activate the HOME Priority mode. The display will remain on the HOME channel frequency, but every five sec-
onds the radio will check the Priority Channel (memory channel) for activity. 4. Press [F/W] [VOL/SQL] again to disable the HOME Priority mode. 35 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning Priority Channel Scanning (Dual Watch) WX Channel Priority 1. Recall the memory channel you wish to use as the Priority frequency. 2. Now, set the radio for operation on a WX channel by press the [F/W] key, then press the [V/M] key. 3. Press the [F/W] key, then press the [VOL/SQL] key to activate the WX Priority mode. The display will remain on the WX channel frequency, but every five seconds the radio will check the Priority Channel (memory channel) for activity. 4. Press [F/W] [VOL/SQL] again to disable the VFO Priority mode. Priority Revert Mode During Priority channel operation (Dual Watch), a special feature is available which will allow you to move to the Priority channel instantly, without waiting for activity to appear on the Priority channel. When this feature is enabled, and Priority monitoring is engaged, just press the PTT switch; operation will instantly revert to the Priority channel. To enable the Priority Revert operation:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to se-
lect Set Mode Item 35: PRI.RVT. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to RVT. ON. 5. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. 6. To disable the Priority Revert operation, just repeat the above procedure, rotat-
ing the DIAL knob to select RVT.OFF in step 4 above. 36 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Automatic Lamp Illumination on Scan Stop Scanning The FT-252 will automatically illuminate the LCD/Keypad Lamp whenever the scan-
ner stops on a signal; this allows you to see the frequency of the incoming signal better at night. Note that this will, of course, increase the battery consumption, so be sure to switch it off during the day (the default condition for this feature is ON). The procedure for disabling the Scan Lamp is:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 39: SCN.LMP. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to OFF. 5. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. Band Edge Beeper The FT-252 will automatically beep when a band edge is encountered during scan-
ning (either in standard VFO scanning or during PMS operation). You may also enable this feature (band edge beeper) to operate when the frequency reaches the band edge while tuning using the DIAL knob. The procedure for enabling the Band-Edge Beeper is:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 20: EDG.BEP. 3. Press the [F/W] key momentarily to enable adjustment of 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to BEP. 5. When you have made your selection, press the PTT switch to save the setting and this Set Mode Item. ON. exit to normal operation. 37 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Scanning Weather Alert Scan This feature allows you to check the Weather Broadcast Memory Channels for the pres-
ence of the NOAA Alert Tone while operating using VFO scan or Memory channel scan. When the Weather Alert Scan feature is engaged, the FT-252 will check the Weather Broadcast Memory Channels for activity every five seconds while scanning. If you watch the display carefully, youll observe the scanner periodically shifting to the Weather Broadcast bank, scanning the Weather channels quickly in search of the Alert Tone, after which regular scanning will resume for another five seconds. To enable the Weather Alert Scan feature:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 48: WX ALT. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select ON. 5. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. 6. To disable the Weather Alert Scan feature, select OFF in step 4 above. 1) When the Weather Alert Scan feature is engaged, the Scan-Resume mode is fixed to TIME. 2) If you are just scanning the Weather Broadcast Channels, the FT-252s receiver will remain muted indefinitely unless the Alert Tone is received. This yields a long period of monitoring time, as no power will be consumed via audio output while scanning for the Alert Tone is in progress. 38 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Emergency Channel Operation The FT-252 includes an Emergency feature which may be useful if you have some-
one monitoring on the same frequency as your transceivers Home channel. See page 23 for details on setting up the Home channel. The Emergency feature is activated by pressing and holding in the [SET] key for one second. When this is done, (A) the radio is placed on the Home channel, (B) it emits a loud Alarm sound (the volume is controlled by the DIAL knob), (C) it flashes the LCD lamp, (D) if you press the PTT switch, you will disable the Emergency feature temporarily; you can then transmit on the Home channel, and (E) two seconds after the PTT switch release, the Emergency feature will resume. To disable the Emergency feature, press the [SET] key momentarily or turn the radio off by pressing the [POWER] switch. Use this feature if you are out for a walk and want a quick way of alerting a family member as to a dangerous situation. The alarm sound may discourage an attacker and allow you to escape. 1) Be sure to arrange with a friend or family member to be monitoring on the same frequency, as there will be no identification sent via the Emergency alarm sound. And do not transmit the alarm tone except in a true emergency!
2) The Emergency feature may be changed to another function via Set Mode Item 21: EMG S; see page 57 for details. 39 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Smart Search Operation The Smart Search feature allows you to load frequencies automatically according to where activity is encountered by your radio. When Smart Search is engaged, the trans-
ceiver will search above and below your current frequency, storing active frequencies as it goes (without stopping on them even momentarily); these frequencies are stored into a special Smart Search memory bank, consisting of 31 memories (15 above the current frequency, 15 below the current frequency, plus the current frequency itself). Two basic operating modes for Smart Search are available:
SINGLE: In this mode, the transceiver will sweep the current band once in each direc-
tion starting on the current frequency. All channels where activity is present will be loaded into the Smart Search memories; whether or not all 31 memo-
ries are filled, the search will stop after one sweep in each direction. In this mode, the transceiver will make one pass in each direction as with One-
Shot searching; if all 31 channels are not filled after the first sweep, however, the radio will continue sweeping until they are all filled. CONT:
Setting the Smart Search Mode 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 37: S SRCH. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired Smart Search mode (see above). 5. When you have made your selection, press the PTT switch to save the setting and exit to normal operation. Storing Smart Search Memories 1. Set the radio to the VFO mode. Be sure that you have the Squelch adjusted properly (so that band noise is quieted). 2. Press the [F/W] key, then press the [H/L] key to begin the Smart Search scanning. 3. As active channels are detected, you will observe the number of loaded channels increasing in the regular memory channel window. 4. Depending on the mode you set for Smart Search opera-
tion (SINGLE or CONT), the Smart Search scan will eventually terminate, and the LCD will revert to Smart Search Memory Channel C. 5. To recall the Smart Search memories, rotate the DIAL knob to choose from among the frequencies stored by Smart Search. 6. To return to normal operation, press the [VFO(PRI)] key. 40 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. ArtS (Automatic Range Transponder System) The ARTS feature uses DCS signaling to inform both parties when you and another ARTS-equipped station are within communications range. This may be particularly useful during Search-and Rescue situations, where is important to stay in contact with other members of your group. Both stations must set up their DCS codes to the same code number, then activate their ARTS feature using the command appropriate for their radio. Alert ringers may be ac-
tivated, if desired. Whenever you push the PTT switch, or every 25 (or 15) seconds after ARTS is activated, your radio will transmit a signal which includes a (subaudible) DCS signal for about 1 second. If the other radio is in range, the beeper will sound (if enabled) and the display will show IN.RNG as opposed to the out of range display OUT.RNG in which ARTS op-
eration begins. Whether you talk or not, the polling every 15 or 25 seconds will continue until you de-activate ARTS. Every 10 minutes, moreover, you can have your radio transmit your callsign via CW, so as to comply with identification require-
ments. When ARTS is de-activated, DCS will also be deactivated (if you were not us-
ing it previously in non-ARTS operation). If you move out of range for more than one minute (four pollings), your radio will sense that no signal has been received, three beeps will sound, and the display will revert to OUT.RNG. If you move back into range, your radio will again beep, and the display will change back to the IN.RNG indication. During ARTS operation, your operating frequency will continue to be displayed, but no changes may be made to it or other settings; you must terminate ARTS in order to resume normal operation. This is a safety feature designed to prevent accidental loss of contact due to channel change, etc. Basic ARTS Setup and Operation 1. Set your radio and the other radio(s) to the same DCS code number, per the discus-
sion on page 18. 2. Press the [POWER] key momentarily. You will observe the OUT. RNG display on the LCD below the operating frequency. ARTS operation has now commenced. 3. Every 25 seconds, your radio will transmit a polling call to the other station. When that station responds with its own ARTS polling signal, the display will change to IN.RNG to confirm that the other stations polling code was received in response to yours. 4. Press the [POWER] key momentarily to exit ARTS operation and resume normal functioning of the transceiver. 41 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. ArtS (Automatic Range Transponder System) ARTS constitutes a form of remote control operation that may be restricted to certain frequencies. U.S. users should confirm the current status of 97.201(b) of the FCCs rules governing the 144 MHz band of the Amateur service before utilizing this feature. ARTS Polling Time Options The ARTS feature may be programmed to poll every 25 seconds (default value) or 15 seconds. The default value provides maximum battery conservation, because the polling signal is sent out less frequently. To change the polling interval:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 5: AR INT. 3. Press the [F/W] key momentarily to enable adjustment of 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired polling interval this Set Mode Item.
(15 or 25 seconds). 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. ARTS Alert Beep Options The ARTS feature allows two kinds of alert beeps (with the additional option of turn-
ing them off), so as to alert you to the current status of ARTS operation. Depending on your location and the potential annoyance associated with frequent beeps, you may choose the Beep mode which best suits your needs. The choices are:
INRANG: The beeps are issued only when the radio first confirms that you are within range, but does not re-confirm with beeps thereafter. ALWAYS: Every time a polling transmission is received from the other station, the alert beeps will be heard. No alert beeps will be heard; you must look at the display to confirm cur-
rent ARTS status. OFF:
To set the ARTS Beep mode, use the following procedure:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 4: AR BEP. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. mode (see above). 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired ARTS Beep 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. 42 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. ArtS (Automatic Range Transponder System) CW Identifier Setup The ARTS feature includes a CW identifier, as discussed previously. Every ten min-
utes during ARTS operation, the radio can be instructed to send DE (your callsign) K if this feature is enabled. The callsign field may contain up to 6 characters. Heres how to program the CW Identifier:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 12: CW WRT. 3. Press the [F/W] key momentarily to display any previous-
ly-stored callsign. 4. Press the [F/W] key again to clear any previous callsign. 5. Rotate the DIAL knob to select the first letter/number of your callsign, then press the [F/W] key momentarily to save the first letter/number and move on to the next char-
acter. 6. Repeat the previous step, as many times as necessary, to complete your callsign. If you make a mistake, press the
[q] key to move back to the previous letter/numbers slot, then re-select the correct letter/number. 7. When you have finished entering your entire callsign and it contains less than 6 characters, press and hold in the
[F/W] key for one second to confirm the callsign. (if you callsign has exactly 6 characters, you do not need to press and hold in [F/W] in this step). 8. Press the PTT switch to save the settings and exit to normal operation. 9. Press the [SET] key to enter the Set mode. 10. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 13: CWID. 11. Press the [F/W] key momentarily, then rotate the DIAL knob to set this Item to TX ON (to enable the CW ID function). 12. Press the PTT switch to save the settings and exit to normal operation. 43 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. DTMF Operation Despite the lack of a DTMF keypad, you can still transmit DTMF tones with the FT-
252 for repeater control or autopatch use. DTMF Autodialer Nine DTMF Autodial memories are provided, allowing you to store telephone num-
bers for autopatch use. You can also store short autopatch or Internet-link access code streams so as to avoid having to send them manually. Here is the DTMF Autodial storage procedure:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 19: DT WRT. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob to select the DTMF Memory reg-
ister (d1 ~ d9) into which you wish to store this DTMF string. 5. Press the [F/W] key momentarily to begin DTMF Memory entry into the selected register. 6. Rotate the DIAL knob to select the first digit of the DTMF string. Selectable entries are 0 - 9, and A - F, with E and F representing DTMF and # tones respectively. 7. Press the [F/W] key to accept the first digit and move to the next digit of the DTMF string. 8. Repeat steps 5 and 6 until you have completed the tele-
phone number. select the correct number. 9. If you make a mistake, press the [q] key to move back to the previous digit, then re-
10. If the telephone number made up of numbers only, you may key in the telephone number directly from the keypad. 11. Press and hold in the [F/L] key for one second to save the setting. 12. If you store other numbers, repeat steps 4- 10 above, using a different DTMF memo-
ry register. 13. When all required DTMF memories are filled to your satisfaction, press the PTT switch to save the settings and exit to normal operation 44 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. DTMF Operation To send the telephone number:
1. Press and hold the PTT switch to continue transmitting during following steps. A. Press the [p] or [q] key to select the DTMF Memory register ([d 1] through [d 9]) you wish to send. B. Press the [F/L] key momentarily to transmit the tone string. Once the string begins, you may release the PTT switch, asthe transmitter will be held on the air until the DTMF string is completed. You can change the DTMF Autodialer sending speed, using Set Mode Item 18: DT SPD. See page 57 for details. You can also set a longer delay between the time you press the numerical key (corre-
sponding to the DTMF memory string; with PTT switch pressed) and the instant when the first DTMF digit is sent, using Set Mode Item 17: DT DLY. See page 57 for details. When you activate the ANI (Automatic Number Identification) feature during DTMF operation, the DTMF tones stored in ANI memory will automatically be sent whenever you press the PTT switch. 45 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. DTMF Operation Storing the ANI code 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 2: ANI.WRT. 3. Press the [F/W] key momentarily to display any previous-
ly-stored ANI code. 4. Press the [F/W] key again to clear any previous ANI code. 5. Rotate the DIAL knob to select the first number/letter (0-9, A, B, C, D, E (substitute for ), and F (substitute for #), then press the [F/W] key momentarily to save the first letter/number and move on to the next character. 6. Repeat the previous step, as many times as necessary (up to 16 characters), to com-
plete ANI code. If you make a mistake, press the [q] key to move back to the previ-
ous letter/numbers slot, then re-select the correct letter/number. 7. When you have finished entering the ANI code and it contains less than 16 charac-
ters, press and hold in the [F/W] key for one second to confirm the callsign. (if the ANI code has exactly 16 characters, you do not need to press and hold in [F/W] in this step). 8. Press the PTT switch to save the settings and exit to normal operation. Activating the ANI feature 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select 3. Press the [F/W] key momentarily to enable adjustment of Set Mode Item 1: ANI. this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select ON. 5. Press the PTT switch to save the new setting and activate the ANI feature. 6. Press the PTT switch to send the DTMF tones stored in ANI memory. 7. To disable the ANI feature, just repeat the above procedure, rotating the DIAL knob or press the [p]/[q] key to select OFF in step 4 above. 46 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Miscellaneous Settings Password The FT-252 provides a security password feature which can minimize the chance that your transceiver could be used by an unauthorized party. When the password feature is activated, the radio will ask for the four digit password to be entered when the radio is first turned on. You must enter the four digit password from the keypad. If the wrong password is entered, the microprocessor will shut down the radio automatically. To enter the password , use the following procedure:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 29: PSWD W. 3. Press the [F/W] key, then press the [F/W] key again to clear any previous password. 4. Rotate the DIAL knob to select the first digit of the desired number/letter (0-9, A, B, C, D, E, and F). 5. Press the [F/W] key to move to the next digit. 6. Repeat steps 4 and 5 to program the remaining numbers/
letters of the desired password. 7. If you make a mistake, press the [q] key to move back to the previous digit, then re-select the correct number/letter. 8. When you have finished entering the password, press the PTT switch to save the new setting and exit to normal operation. We recommend that you to write down the password number, and keep it in a safe place you can easily find if you forget your password. To Activate the Password feature:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 28: PASSWD. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to PWD. ON. 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. If you wish to disable the Password feature, just repeat the above procedure, rotat-
ing the DIAL knob to select PWD.OFF in step 4 above. 6. If you forget the password number, you may turn on the transceiver by performing the All Reset procedure (see page 52). However, the FT-252 will clear the password, as well as all memories, and will restore all other settings to factory defaults. 47 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Miscellaneous Settings Changing the Channel Steps The FT-252s synthesizer provides the option of utilizing channel steps of 5/10/12.5/15/20/25/50/100 kHz per step, as well as an automatic step selection based on the current operating frequency (AUTO), any number of which may be important to your operating requirements. The FT-252 is set up at the factory in the AUTO con-
figuration, which probably is satisfactory for most operation. However, if you need to change the channel step increments, the procedure to do so is very easy. 1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 22: F STEP. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select the new channel step size. 5. When you have made your selection, press the PTT switch to save the new setting and return to normal operation. Receive Battery Saver Setup An important feature of the FT-252 is its Receive Battery Saver, which puts the ra-
dio to sleep for a time interval, periodically waking it up to check for activity. If somebody is talking on the channel, the FT-252 will remain in the active mode, then resume its sleep cycles. This feature significantly reduces quiescent battery drain, and you may change the amount of sleep time between activity checks using the Set Mode:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 36: RXSAVE. 3. Press the [F/W] key momentarily to enable adjustment of this Item. 4. Rotate the DIAL knob or press the [p]/[q] key to select the desired sleep duration. The selections available are 200 ms, 300 ms, 500 ms, 1 second, 2 seconds, or OFF. The default value is 200 ms. 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. 48 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Miscellaneous Settings TX Battery Saver The FT-252 also includes a useful Transmit Battery Saver, which will automatically lower the power output level when the last signal received was very strong. For ex-
ample, when you are in the immediate vicinity of a repeater station, there generally is no reason to use the High Power output in order to achieve full-quieting access to the repeater. With the Transmit Battery Saver, the automatic selection of Low Power opera-
tion conserves battery drain significantly. To activate the Transmit Battery Saver:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 46: TXSAVE. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to SAV. ON (thus activating the Transmit Battery Saver). 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. Transmitter Time-Out Timer (TOT) The TOT feature provides a safety switch which limits transmission time to a pre-
programmed value. This will promote battery conservation by not allowing you to make excessively-long transmissions, and in the event of a stuck PTT switch (perhaps if the radio is wedged between car seats) it can prevent interference to other users as well as battery depletion. As configured at the factory the TOT feature is set to 6 minutes, and here is the procedure for activating it:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select 3. Press the [F/W] key momentarily to enable adjustment of Set Mode Item 45: TOT. this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set the Time-Out Timer to the de-
sired Maximum TX time (between 1 and 30 minutes), or OFF. 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. 1) When your transmission time is within 10 seconds of the Time-Out Timer expira-
tion, an Alert bell will provide an audible warning from the speaker. 2) Since brief transmissions are the mark of a good operator, try setting up your ra-
dios TOT feature for a maximum transmission time of one minute. This will sig-
nificantly improve battery life, too!
49 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Miscellaneous Settings Busy Channel Lock-Out (BCLO) The BCLO feature prevents the radios transmitter from being activated if a signal strong enough to break through the noise squelch is present. On a frequency where stations using different CTCSS or DCS codes may be active, BCLO prevents you from disrupting their communications accidentally (because your radio may be muted by its own Tone Decoder). The default setting for the BCLO is OFF, and here is how to change that setting:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select 3. Press the [F/W] key momentarily to enable adjustment of Set Mode Item 8: BCLO. this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to BCL. ON (thus activating the BCLO feature). 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. DCS Code Inversion The DCS system was first introduced in the commercial LMR (Land Mobile Radio) service, where it is now in widespread use. DCS is sometime referred to by its different proprietary names, such as DPL (Digital Private Line, a registered trademark of Mo-
torola, Inc.). DCS uses a codeword consisting of a 23-bit frame, transmitted (subaudible) at a data rate of 134.4 bps (bit/sec). Occasionally, signal inversion can result in the complement of a code to be sent or received. This prevents the receivers squelch from opening with DCS enabled, as the decoded bit sequence would not match that selected for operation. Typical situations that might cause inversion to occur are:
Connection of an external receiver preamplifier. Operating through a repeater. Connection of an external linear amplifier. Note that code inversion does not mean that any of the above listed equipment is defec-
tive!
In certain amplifier configurations, the output signal (phase) is inverted from the input. Small signal or power amplifiers having an odd number (1, 3, 5, etc.) of amplification stages may result in inversion of a transmitted or received DCS code. While under most circumstances this should not occur (amplifier designs and industry 50 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Miscellaneous Settings standards take this into account), if you find that your receiver squelch does not open when both you and the other station are using a common DCS code, you or the other station (but not both) can try the following:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 16: DCS.N/R. 3. Press the [F/W] key momentarily, then rotate the DIAL knob or press the [p]/[q] key to select one of the follow-
ing modes:
T/RX N: Encoder, Normal; Decoder, Normal RX R:
TX R:
T/RX R: Encoder, Reverse (Inverted); Decoder, Reverse (Inverted) 4. When you have made your selection, press the PTT switch to save the new setting Encoder, Normal; Decoder, Reverse (Inverted) Encoder, Reverse (Inverted); Decoder, Normal and exit to normal operation. 5. Remember to restore the default setting to T/RX N (Encoder; Normal, Decoder;
Normal) when done. Changing the TX Deviation Level In many areas of the world, channel congestion has required that operating channels be closely spaced. In such operating environments, it often is required that operators use re-
duced deviation levels, so as to reduce the potential for interference to users on adjacent channels. The FT-252 includes a simple method of accomplishing this:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select Set Mode Item 47: WID.NAR. 3. Press the [F/W] key momentarily to enable adjustment of this Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to set this Set Mode Item to NAR-
ROW. In this configuration (HALF DEVIATION active), the transmitters devia-
tion will be approximately 2.5 kHz, and the received audio output level will be increased, for easier listening on the narrow signal. 5. When you have made your selection, press the PTT switch to save the new setting and exit to normal operation. The normal setting for the deviation (when this Menu Item is set to WIDE) is 5 kHz. 51 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Reset Procedures In the event of erratic operation of the transceiver, it is possible that data on the micro-
processor may have become corrupted. While this is a highly unusual situation, the only path to recovery may involve resetting of the microprocessor. Heres how to do this:
1. Turn the radio off. 2. Press and hold in the [V/M] key while turning the radio on. 3. Rotate the DIAL knob to select one of the choices from the reset menu:
4. Press the [V/M] key momentarily to complete the reset procedure. The F5 option is used for setting up the Memory Only mode. See page 27 for de-
tails regarding the memory Only mode. F1 SETRST: Resets the Set (Menu) mode settings to their factory defaults. F2 MEMRST: Clears the Memory settings to factory defaults. F3 MB RST: Clears the Memory Bank Assignments. F4 ALLRST: Clears all memories and other settings to factory defaults. 52 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode The FT-252 Set Mode, already described in parts of many previous chapters, is easy to activate and set. It may be used for configuration of a wide variety of transceiver param-
eters, some of which have not been detailed previously. Use the following procedure to activate the Set Mode:
1. Press the [SET] key to enter the Set mode. 2. Rotate the DIAL knob or press the [p]/[q] key to select the Set Mode Item to be adjusted. 3. Press the [F/W] key momentarily to enable adjustment of the Set Mode Item. 4. Rotate the DIAL knob or press the [p]/[q] key to adjust or select the parameter to be changed on the Set Mode Item selected in above step. 5. After completing your selection and adjustment, press the PTT switch momentarily to save the new setting and exit to normal operation. Some Set Mode Items (like Set Mode Item 44: TN FRQ) require that the [F/W] key be pressed after setting of the parameter, and before exiting to normal operation. Set Mode iteM Function 1 [ANI]
2 [ANI.WRT]
3 [APO]
4 [AR BEP]
5 [AR INT]
6 [ARS]
8 [BCLO]
9 [BEEP]
10 [BELL]
Enables/Disables the ANI function.Setting of the Automatic Program the ANI Identifier. Power-Off feature. Selects the Beep option during ARTS operation. Selects the Polling Interval during ARTS operation. Enables/Disables the Automatic Repeater Shift function. Enables/Disables the Busy Channel Lock-Out feature. Enables/Disables the beeper. Selects the number of CTCSS/DCS Bell ringer repetitions. 11 [CLK.SFT]
12 [CW WRT]
13 [CWID]
14 [DC VLT]
15 [DCS.COD]
16 [DCS.N/R]
Shifting of the CPU clock frequency. Programs and activates the CW Identifier. Enables/disables the CW identifier during ARTS operation. Indicates the DC Supply Voltage. Setting of the DCS code. Enables/Disables Inverted DCS code decoding. 17 [DT DLY]
Setting of the DTMF Autodialer Delay Time. 18 [DT SPD]
19 [DT WRT]
20 [EDG.BEP]
21 [EMG S]
Setting of the DTMF Autodialer Sending Speed. Programming of the DTMF Autodialer. Enables/Disables the Band-edge beeper while selecting the frequency via the DIAL knob. Selects the alarm(s) utilized when the Emergency function is engaged. 22 [F STEP]
Setting of the synthesizer steps. 23 [LAMP]
24 [LOCK]
Selects the LCD/Keypad Lamp mode. Selects the Control Locking lockout combination. AvAiLAbLe vALueS
(deFAuLt: Bold ItalIc) ANI.OFF/ANI. ON
OFF / 0.5H - 12.0 H INRANG / ALWAYS / OFF 25 SEC / 15 SEC ARS. ON / ARS.OFF BCL. ON / BCL.OFF KEY+SC / KEY / OFF OFF / 1T / 3T /
5T / 8T / CONT SFT.OFF / SFT. ON TX OFF / TX ON 104 DCS codes (023) T/RX N, RX R, TX R, T/RX R 50MS / 100MS / 250MS /
450MS / 750MS / 1000MS 50MS / 100MS BEP.OFF / BEP. ON
EMG.BEP / EMG.LMP / EMG. B+L / EMG.CWT / EMG.C+B
/ EMG.C+L / EMG.ALL / OFF 5 / 10 / 12.5 / 15 / 20 / 25 / 50
/ 100 kHz, or AUTO KEY / CONT / OFF LK KEY / LKDIAL / LK K+D /
LK PTT / LK P+K /
LK P+D / LK ALL 53 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. AvAiLAbLe vALueS
(deFAuLt: Bold ItalIc) MONI / T-CALL FREQ / ALPHA
PWD.OFF / PWD. ON 0.00 - 99.95 MHz (0.60 MHz) BUSY / HOLD / TIME
<REV> / <HOME>
S-1 / S-2 / S-3 / S-4 / S-5 /
S-6 / S-8 / S-FULL / OFF RPT.OFF / RPT. / RPT. +
RVT.OFF / RVT. ON 200 MS / 300 MS /500 MS /
1 SEC / 2 SSEC / OFF SINGLE / CONT ONLY / MEM ON / OFF OFF / SKIP / ONLY SPL.OFF / SPL. ON OFF / TONE / TSQL /
REV TN / DCS / ECS
50 CTCSS tones (100 Hz) 1MIN - 30MIN or OFF (6 MIN) SAV.OFF / SAV. ON WIDE / NARROW ALT.OFF / ALT. ON Set (Menu) Mode Set Mode iteM Function 25 [M/TCAL]
26 [NAME]
27 [NM WRT]
28 [PASSWD]
29 [PSWD W]
30 [R SHFT]
31 [RESUME]
32 [REV/HM]
33 [RF SQL]
34 [RPT.MOD]
35 [PRI.RVT]
36 [RXSAVE]
37 [S SRCH]
38 [SCN MD]
39 [SCN.LMP]
40 [SKIP]
41 [SPLIT]
42 [SQL.TYP]
43 [TEMP]
44 [TN FRQ]
45 [TOT]
46 [TXSAVE]
47 [WID.NAR]
48 [WX ALT]
Selects the [VOL/SQL] key function. Toggles the display indication between frequency and the channels Alpha/Numeric Tag. Stores Alpha-Numeric Tags for the Memory channels. Enables/disables the Password feature. Stores the password. Sets the magnitude of the repeater Shift. Selects the Scan Resume mode. Selects the function of the [HM/RV] key. Adjusts the RF Squelch threshold level. Sets the Repeater Shift Direction. Enables/disables the Priority Revert feature. Selects the Receive-mode Battery Saver interval (sleep ratio) Selects the Smart Search Sweep mode. Selects the Memory Scan channel-selection mode. Enables/Disables the Scan lamp while paused. Selects the Memory Scan Skip channel-selection mode. Enables or disables VFO Split operation. Selects the Tone Encoder and/or Decoder mode. Indicate the current temperature inside the transceivers case. Setting of the CTCSS Tone Frequency. Setting of the TOT time. Enables/Disables the Transmitter Battery Saver. Select Wide (5 kHz) or Narrow (2.5 kHz) TX Deviation. Enables/Disables the Weather Alert Scan feature. 54 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 1 [ANI]
Function: Enables/Disables the ANI function. Available Values: ANI.OFF/ANI. ON Default: ANI. OFF Set Mode Item 2 [ANI.WRT]
Function: Program the ANI Identifier. See page 46 for details. Set Mode Item 3 [APO]
Function: Setting of the Automatic Power-Off feature. Available Values: OFF/0.5H - 12.0 H in 0.5 hour multiples Default: OFF Set Mode Item 4 [AR BEP]
Function: Selects the Beep option during ARTS operation. Available Values: INRANG/ALWAYS/OFF Default: INRANG INRANG: Beeps sound only when the radio first detects that you are within range. ALWAYS: Beeps sound every time a polling transmission is received from the other sta-
tion (every 15 or 25 seconds when in range). No alert beeps sound. OFF:
Set Mode Item 5 [AR INT]
Function: Selects the Polling Interval during ARTS operation. Available Values: 25 SEC/15 SEC Default: 25SEC Set Mode Item 6 [ARS]
Function: Enables/Disables the Automatic Repeater Shift function. Available Values: ARS. ON/ARS.OFF Default: ARS. ON Set Mode Item 8 [BCLO]
Function: Enables/Disables the Busy Channel Lock-Out feature. Available Values: BCL. ON/BCL.OFF Default: BCL.OFF 55 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 9 [BEEP]
Function: Enables/Disables the beeper. Available Values: KEY+SC/KEY/OFF Default: KEY+SC KEY+SC: The beeper sounds when you press any key, or when the scanner stops. KEY: The beeper sounds when you press any key. OFF: Beeper is disabled. Set Mode Item 10 [BELL]
Function: Selects the number of CTCSS/DCS Bell ringer repetitions. Available Values: OFF/1T/3T/5T/8T/CONT (Continuous ringing) Default: OFF Set Mode Item 11 [CLK.SFT]
Function: Shifting of the CPU clock frequency. Available Values: SFT.OFF/SFT. ON Default: SFT.OFF This function is only used to move a spurious response birdie, should it fall on a de-
sired frequency. Set Mode Item 12 [CW WRT]
Function: Programs and activates the CW Identifier (used during ARTS operation). See page 41 for details. Set Mode Item 13 [CWID]
Function: Enables/disables the CW identifier during ARTS operation. Available Values: TX OFF/TX ON Default: TX OFF Set Mode Item 14 [DC VLT]
Function: Indicates the DC Supply Voltage. Set Mode Item 15 [DCS.COD]
Function: Setting of the DCS code. Available Values: 104 standard DCS codes Default: DCS.023 Set Mode Item 16 [DCS.N/R]
Function: Enables/Disables Inverted DCS code decoding. Available Values: T/RX N, RX R, TX R, T/RX R Default: T/RX N 023 025 026 031 032 036 043 047 051 053 054 065 071 072 073 074 114 115 116 122 125 131 132 134 143 145 152 155 156 162 165 172 174 205 212 223 225 226 243 244 245 246 251 252 255 261 263 265 266 271 274 306 311 315 325 331 332 343 346 351 356 364 365 371 411 412 413 423 431 432 445 446 452 454 455 462 464 465 466 503 506 516 523 526 532 546 565 606 612 624 627 631 632 654 662 664 703 712 723 731 732 734 743 754 DCS CODE 56 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 17 [DT DLY]
Function: Setting of the DTMF Autodialer Delay Time. Available Values: 50MS/100MS/250MS/450MS750MS/1000MS Default: 450MS Set Mode Item 18 [DT SPD]
Function: Setting of the DTMF Autodialer Sending Speed. Available Values: 50MS (high speed)/100MS (low speed) Default: 50MS Set Mode Item 19 [DT WRT]
Function: Programming of the DTMF Autodialer. See page 44 for details. Set Mode Item 20 [EDG.BEP]
Function: Enables/Disables the Band-edge beeper while selecting the frequency via the DIAL knob. Available Values: BEP.OFF/ BEP. ON Default: BEP.OFF Set Mode Item 21 [EMG S]
Function: Selects the alarm(s) utilized when the Emergency function is engaged. Available Values: EMG.BEP/EMG.LMP/EMG.B+L/EMG.CWT/EMG.C+B/EMG. C+L/EMG.ALL/OFF Default: EMG.B+L EMG.BEP: Loud Alarm sounds. EMG.LMP: The LCD/Keypad lamp flashes. EMG.B+L: Loud Alarm sounds and the LCD/Keypad lamp flashes. EMG.CWT: Transmits the Morse Code SOS ( ) message on the air be-
ginning one minute after activation of the Emergency function. EMG.C+B: Loud Alarm sounds and the Morse Code SOS ( ) mes-
sage is transmitted on the air beginning one minute after activation of the Emergency function. EMG.C+L: The LCD/Keypad lamp flashes, and the Morse Code SOS (
) message is transmitted on the air beginning one minute after activation of the Emergency function. Disables the Emergency function. EMG.ALL: All of the above are activated. OFF:
When the radio is set to the EMG.CWT, EMG.C+B, EMG.C+L, or EMG.ALL mode, the radio will be instructed to send DE (your callsign) after the sending of the SOS message, if your callsign is entered via Set Mode Item 13: CWID. 57 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 22 [F STEP]
Function: Setting of the synthesizer steps. Available Values: 5/10/12.5/15/20/25/50/100 kHz, or AUTO Default: AUTO (Step automatically changes according to operating frequency.) Set Mode Item 23 [LAMP]
Function: Selects the LCD/Keypad Lamp mode. Available Values: KEY/CONT/OFF Default: KEY KEY:
Illuminates the Keypad/LCD lamp for five seconds when you rotate the DIAL knob or press the keypad or any switch (except PTT switch). This is the facto-
ry-programmed default setting. CONT: Illuminates the Keypad/LCD lamp continuously. OFF: Disables the Keypad/LCD lamp. Set Mode Item 24 [LOCK]
Function: Selects the Control Locking lockout combination. Available Values: LK KEY/LKDIAL/LK K+D/LK PTT/LK P+K/LK P+D/LK ALL Default: LK K+D Note: K = Key; D = Dial; and P = PTT. Set Mode Item 25 [M/TCAL]
Function: Selects the [VOL/SQL] key function. Available Values: MONI/T-CALL Default: Depends on the transceiver version. MONI: Pressing the [VOL/SQL] key causes the Noise/Tone Squelch to be over-
ridden, allowing you to listen for weak (or non-encoded) signals. T-CALL: Pressing the [VOL/SQL] key activates a 1750-Hz burst tone, used for repeater access in many countries (especially in Europe). Set Mode Item 26 [NAME]
Function: Toggles the display indication between frequency and the channels Alpha/
Numeric Tag. Available Values: FREQ/ALPHA Default: FREQ Set Mode Item 27 [NM WRT]
Function: Stores Alpha-Numeric Tags for the Memory channels. See page 24 for details. Set Mode Item 28 [PASSWD]
Function: Enables/disables the Password feature. Available Values: PWD.OFF/PWD. ON Default: PWD.OFF 58 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 29 [PSWD W]
Function: Stores the password. Available entries are 0-9, A, B, C, D, E, and F. Set Mode Item 30 [R SHIFT]
Function: Sets the magnitude of the repeater Shift. Available Values: 0.00 - 99.95 MHz (50 kHz increments) Default: Depends on the operating band and transceiver version. Set Mode Item 31 [RESUME]
Function: Selects the Scan Resume mode. Available Values: BUSY/HOLD/TIME Default: BUSY BUSY: The scanner will hold until the signal disappears, then will resume when the carrier drops. HOLD: The scanner will stop when a signal is received, and will not restart. TIME: The scanner will hold for the five seconds, then resume whether or not the other station is still transmitting. Set Mode Item 32 [REV/HM]
Function: Selects the function of the [REV(HOME)] key. Available Values: <REV>/<HOME>
Default: <REV>
<REV>: Pressing the [REV(HOME)] key reverses the transmit and receive frequencies during repeater operation.
<HOME>: Pressing the [REV(HOME)] key instantly recalls a favorite Home channel. Set Mode Item 33 [RF SQL]
Function: Adjusts the RF Squelch threshold level. Available Values: S-1/S-2/S-3/S-4/S-5/S-6/S-8/S-FULL/OFF Default: OFF Set Mode Item 34 [RPT.MOD]
Function: Sets the Repeater Shift Direction. Available Values: RPT.OFF/RPT. /RPT. +
Default: Depends on the transceiver version, as well as the setting of Set Mode Item 4:
ARS. Set Mode Item 35 [PRI.RVT]
Function: Enables/disables the Priority Revert feature. Available Values: RVT.OFF/RVT. ON Default: RVT.OFF See page 36 for details. 59 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 36 [RXSAVE]
Function: Selects the Receive-mode Battery Saver interval (sleep ratio) Available Values: 200 MS(1:1)/300 MS(1:1.5)/500 MS(1:2.5)/1 S(1:5)/2 S(1:10)/OFF Default: 200 MS Set Mode Item 37 [S SRCH]
Function: Selects the Smart Search Sweep mode. Available Values: SINGLE/CONT Default: SINGLE SINGLE: The transceiver sweeps the current band once in each direction, starting on the current frequency. All channels where activity is present (up to 15 in each direction) are loaded into the Smart Search memories. Whether or not all 31 memories are filled, the search stops after one sweep in each direction. The transceiver makes a sweep in each direction as with the SINGLE mode, but if all 31 channels are not filled after the first sweep, the radio con-
tinues sweeping until they are all filled. CONT:
Set Mode Item 38 [SCN MD]
Function: Selects the Memory Scan channel-selection mode. Available Values: ONLY/MEM Default: MEM ONLY: The scanner will only scan channels that are flagged (Preferential Scan List). MEM: The scanner will skip the flagged channels during scanning. Set Mode Item 39 [SCN.LMP]
Function: Enables/Disables the Scan lamp while paused. Available Values: ON/OFF Default: ON Set Mode Item 40 [SKIP]
Function: Selects the Memory Scan Skip channel-selection mode. Available Values: OFF/SKIP/ONLY Default: OFF SKIP: The scanner will skip the flagged channels during scanning. ONLY: The scanner will only scan channels that are flagged (Preferential Scan List). OFF: All memory channels will be scanned (the flag will be ignored). 60 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 41 [SPLIT]
Function: Enables/Disables split CTCSS/DCS coding. Available Values: SPL.OFF/SPL. ON Default: SPL.OFF When this Set Mode Item is set to SPL. ON, you will see the following additional pa-
rameters after the DCS parameter while configuring Set Mode Item 44: SQL.TYP. D: DCS Encode only. T DCS: Encodes a CTCSS tone and Decodes a DCS code. D TSQL: Encodes a DCS code and Decodes a CTCSS tone. Select the desired operating mode from the selections shown above. Set Mode Item 42 [SQL.TYP]
Function: Selects the Tone Encoder and/or Decoder mode. Available Values: OFF/TONE/TSQL/REV TN/DCS/ECS Default: OFF TONE: CTCSS Encoder TSQL: CTCSS Encoder/Decoder REV TN: Reverse CTCSS Decoder (Mutes receiver when matching tone is received) DCS: Digital Coded Encoder/Decoder ECS: Enhanced Paging & & Code Squelch Note: See also Set Mode Item 41: SPLIT regarding additional selections available dur-
ing Split Tone operation. Set Mode Item 43 [TEMP]
Function: Indicate the current temperature inside the transceivers case. Set Mode Item 44 [TN FRQ]
Function: Setting of the CTCSS Tone Fre-
quency. Available Values: 50 standard CTCSS tones Default: 100.0 Hz Set Mode Item 45 [TOT]
Function: Setting of the TOT time Available Values: 1MIN - 30MIN or OFF Default: 6MIN (minutes) The time-out timer shuts off the transmitter after continuous transmission of the pro-
grammed time. 79.7 67.0 82.5 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.1 CTCSS TONE FREQUENCY (Hz) 77.0 94.8 69.3 85.4 71.9 88.5 74.4 91.5 61 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Set (Menu) Mode Set Mode Item 46 [TXSAVE]
Function: Enables/Disables the Transmitter Battery Saver. Available Values: SAV.OFF/ SAV. ON Default: SAV.OFF Set Mode Item 47 [WID.NAR]
Function: Select Wide (5 kHz) or Narrow (2.5 kHz) TX Deviation. Available Values: WIDE/NARROW Default: WIDE Note: If Narrow is selected, the receiver audio level is increased slightly to compen-
sate for the reduced deviation. The receiver IF filter bandwidth is not changed via this setting. Set Mode Item 48 [WX ALT]
Function: Enables/Disables the Weather Alert Scan feature. Available Values: ALT.OFF/ALT. ON Default: ALT. OFF 62 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Specifications General Frequency Ranges: RX 136 - 174 MHz TX 144 - 146 (148) MHz Channel Steps: 5/10/12.5/15/20/25/100 kHz Frequency Stability: 2.5 ppm @ 14 to 140 F (10 to +60 C) Repeater Shift: 600 kHz Emission Type: F2 , F3 Antenna Impedance: 50 Supply Voltage: Nominal: 7.4 V DC
(Negative Ground) Operating: 5.0 ~ 10.0 V DC (EXT DC Jack) Current Consumption: 200 mA (Receive, 200 mW output)
(Approx. @7.4 V) 70 mA (Standby, Saver Off) 25 mA (Standby, Saver On) 0.5 mA (Auto Power Off) 1.6 A (5 W TX) Operating Temperature: 4 to 140 F (20 C to +60 C) Case Size: 2.45 (W) x 4.74 (H) x 1.52 (D) (62 x 120.5 x 38.5 mm)
(W/O knob, antenna, & belt clip) Weight: 9.9 Oz (280 g) with FNB-124LI, antenna, and belt clip Transmitter RF Power Output: 5.0 W (High) / 2.0 W (Middle) / 0.5 W (Low) (@7.4 V) Modulation Type: Variable Reactance F2, F3 Maximum Deviation: 5.0 kHz (F2, F3) Spurious Emission: At least 60 dB down (@ High and Middle power) At least 40 dB down (@ Low power) Microphone Impedance: 2 k Receiver Circuit Type: Direct-Conversion Sensitivity: 0.2 V for 12 dB SINAD (144-148 MHz) 0.16 V for 12 dB SINAD (Out of Amateur band) Selectivity: 12 kHz/35 kHz (6 dB /60 dB) AF Output: 800 mW @ 16 for 10 % THD (Internal Speaker)
(@ 4.8 V) Specifications are subject to change without notice, and are guaranteed within the 144 MHz amateur band only. Frequency ranges and functions will vary according to transceiver version; check with your dealer. 63 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Note 64 FT-252 OperaTing ManualFCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. 1. Changes or modifications to this device not expressly approved by YAESU MUSEN could void the users authorization to operate this device. 2. 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 including received, interference that may cause undesired operation. 3. The scanning receiver in this equipment is incapable of tuning, or readily being altered, by the User to operate within the frequency bands allocated to the Domestic public Cellular Telecommunications Service in Part 22. DECLARATION BY MANUFACTURER The Scanner receiver is not a digital scanner and is incapable of being converted or modified to a digital scanner receiver by any user. WARNING: MODIFICATION OF THIS DEVICE TO RECEIVE CELLULAR RADIOTELEPHONE SERVICE SIGNALS IS PROHIBITED UNDER FCC RULES AND FEDERAL LAW. FCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD. Copyright 2013 YAESU MUSEN CO., LTD. All rights reserved. No portion of this manual may be reproduced without the permission of YAESU MUSEN CO., LTD. Printed in Japan EH053N100 FCC ID: K6620533X20 / IC: 511B-20533X20YAESU MUSEN CO., LTD.
frequency | equipment class | purpose | ||
---|---|---|---|---|
1 | 2013-05-17 | 136 ~ 174 | CSR - Scanning Receiver | Class II permissive change or modification of presently authorized equipment |
2 | 2013-02-22 | 136 ~ 174 | CSR - Scanning Receiver | Original Equipment |
app s | Applicant Information | |||||
---|---|---|---|---|---|---|
1 2 | Effective |
2013-05-17
|
||||
1 2 |
2013-02-22
|
|||||
1 2 | Applicant's complete, legal business name |
Yaesu Musen Co., Ltd.
|
||||
1 2 | FCC Registration Number (FRN) |
0013655220
|
||||
1 2 | Physical Address |
Tennozu Parkside Building
|
||||
1 2 |
Tokyo, N/A 140-0002
|
|||||
1 2 |
Japan
|
|||||
app s | TCB Information | |||||
1 2 | TCB Application Email Address |
T******@TIMCOENGR.COM
|
||||
1 2 | TCB Scope |
A1: Low Power Transmitters below 1 GHz (except Spread Spectrum), Unintentional Radiators, EAS (Part 11) & Consumer ISM devices
|
||||
app s | FCC ID | |||||
1 2 | Grantee Code |
K66
|
||||
1 2 | Equipment Product Code |
20533X20
|
||||
app s | Person at the applicant's address to receive grant or for contact | |||||
1 2 | Name |
K****** T******
|
||||
1 2 | Title |
Engineering Division/Quality Assurance Leader
|
||||
1 2 | Telephone Number |
81-3-********
|
||||
1 2 | Fax Number |
81-3-********
|
||||
1 2 |
k******@yaesu.com
|
|||||
app s | Technical Contact | |||||
n/a | ||||||
app s | Non Technical Contact | |||||
n/a | ||||||
app s | Confidentiality (long or short term) | |||||
1 2 | Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | No | ||||
1 2 | Yes | |||||
1 2 | Long-Term Confidentiality Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | No | ||||
1 2 | Yes | |||||
1 2 | If so, specify the short-term confidentiality release date (MM/DD/YYYY format) | 04/08/2013 | ||||
if no date is supplied, the release date will be set to 45 calendar days past the date of grant. | ||||||
app s | Cognitive Radio & Software Defined Radio, Class, etc | |||||
1 2 | Is this application for software defined/cognitive radio authorization? | No | ||||
1 2 | Equipment Class | CSR - Scanning Receiver | ||||
1 2 | Description of product as it is marketed: (NOTE: This text will appear below the equipment class on the grant) | VHF AMATEUR RADIO WITH SCANNING RECEIVER | ||||
1 2 | VHF Amateur Radio with Scanning Receiver | |||||
1 2 | Related OET KnowledgeDataBase Inquiry: Is there a KDB inquiry associated with this application? | No | ||||
1 2 | Modular Equipment Type | Does not apply | ||||
1 2 | Purpose / Application is for | Class II permissive change or modification of presently authorized equipment | ||||
1 2 | Original Equipment | |||||
1 2 | Composite Equipment: Is the equipment in this application a composite device subject to an additional equipment authorization? | No | ||||
1 2 | Related Equipment: Is the equipment in this application part of a system that operates with, or is marketed with, another device that requires an equipment authorization? | No | ||||
1 2 | Is there an equipment authorization waiver associated with this application? | No | ||||
1 2 | If there is an equipment authorization waiver associated with this application, has the associated waiver been approved and all information uploaded? | No | ||||
app s | Test Firm Name and Contact Information | |||||
1 2 | Firm Name |
Timco Engineering, Inc.
|
||||
1 2 | Name |
B******** C******
|
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1 2 | Telephone Number |
352-4********
|
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1 2 | Fax Number |
352 4********
|
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1 2 |
b******@timcoengr.com
|
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Equipment Specifications | |||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Line | Rule Parts | Grant Notes | Lower Frequency | Upper Frequency | Power Output | Tolerance | Emission Designator | Microprocessor Number | |||||||||||||||||||||||||||||||||
1 | 1 | 15B | 136.00000000 | 174.00000000 | |||||||||||||||||||||||||||||||||||||
Line | Rule Parts | Grant Notes | Lower Frequency | Upper Frequency | Power Output | Tolerance | Emission Designator | Microprocessor Number | |||||||||||||||||||||||||||||||||
2 | 1 | 15B | 136.00000000 | 174.00000000 |
some individual PII (Personally Identifiable Information) available on the public forms may be redacted, original source may include additional details
This product uses the FCC Data API but is not endorsed or certified by the FCC