Icom Learn About Tone Mode TSQL and Tone Squelch Operations
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TONE SQUELCH OPERATION

■ Tone squelch operation

■ Pocket beep operation

The tone squelch opens only when receiving a signal con- taining a matching CTCSS (subaudible) tone. You can silently wait for calls from group members using the same tone.

qSet the desired channel.

wSet the desired CTCSS tone in set mode.

•See p. 7 for tone frequencies and programming information. e Push [–] for 2 sec. several times until “T SQL” appears. r When the received signal includes a matching tone,

squelch opens and the signal can be heard.

•When the received signal’s tone does not match, tone squelch does not open, however, the S-indicator shows signal strength.

•To open the squelch manually, push [–].

tOperate the transceiver in the normal way.

yTo cancel the tone squelch, push [–] for 2 sec. twice.

NOTE: The transceiver has 51 tone frequencies and con- sequently their spacing is narrow compared with units hav- ing 38 tones. Therefore, some tone frequencies may receive interference from adjacent tone frequencies.

Tone frequencies and tone squelch ON/OFF settings are automatically stored in memory channels for easy recall.

This function uses CTCSS (subaudible) tones for calling and can be used as a “common pager” to inform you that some- one has called while you were away from the transceiver.

DWaiting for a call from a specific station

qSet the operating channel.

wSet the desired CTCSS tone in set mode.

•See p. 7 for tone frequencies and programming information.

e Push [–] for 2 sec. several times until “T SQL ë” appears in the function display.

r When a signal with the correct tone is received, the transceiver emits beep tones and flashes “T SQL ë.”

t Push [PTT] to answer or push [–] to stop the beeps and flashing.

•Tone squelch is automatically selected.

DCalling a waiting station using pocket beep

A subaudible tone matched with the station’s tone frequency is necessary. Use the tone squelch at left or a CTCSS (sub- audible) tone encoder (p. 7).

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Contents I40S N33 Accessories included with the transceiver Qty Supplied AccessoriesTable of Contents Belt clip Accessory AttachmentBattery pack replacement AntennaPanel description Panel Description1EXTERNAL DC Power Jack Charge Function display Receiving and transmitting Select the desired channel with the Y/Z switchesPush LOW to select the output power if necessary Basic OperationMonitor function DSetting the backlighting timerDisplay backlighting Lock functionPush and hold PTT to transmit Repeater operationOpen Scan Scan OperationScan types Open scanSetting scan tag Group and priority scansSelect the priority channel if desired Scan resume Condition Push LOW for 2 sec. to exit Set modeTone squelch operation Pocket beep operation Calling a waiting station using pocket beepSquelch opens and the signal can be heard Tone Squelch OperationTery pack becomes exhausted Battery PacksCharging Battery pack Precautions Rapid charging with the BC-119Regular charging Multiple charging with the BC-121Operating period About the battery packInstalling batteries in the battery case Battery pack lifeTime-out timer Power saver Other FunctionsConfirmation beeps HM-75A functions Turning the microphone remote control function ON/OFFTransmit lockout Optional HM-75A functionsProblem Possible Cause Solution TroubleshootingCurrent drain approx SpecificationsDGeneral DTransmitter DReceiverBattery packs OptionsOther options Kamihigashi, Hirano-ku, Osaka 547 Japan
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