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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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Icom IC-40S instruction manual Tone Squelch Operation, Tone squelch operation Pocket beep operation