Icom IC-F21S [24/28] Setting squelch level

CONVENTIONAL OPERATION

‘‘

Setting squelch level

The squelch circuit mutes the received audio signal depending on

the signal strength.

q While pushing [PTT] and [Lower],

turn the transceiver’s power on to

enter the squelch adjustment

mode.

w Push [Upper] to increase the

squelch level (tight squelch) or

[Lower] to decrease the squelch

level (loose squelch).

• Squelch level will be fixed after

1 sec.

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Transmitting notes

TIME-OUT TIMER

After continuous transmission for a pre-programmed period, the

time-out timer is activated causing the transceiver to stop transmit-

ting, and automatically select receive.

PENALTY TIMER

Once the time-out timer is activated, transmission is further inhibited

for a period determined by the penalty timer.

[Upper]

[PTT]

[Lower]

IC-F21_1 IM 01.11.13 2:02 PM Page 24 (1,1)