Icom IC-F21GM - Manual (Page 28)

OPERATION
21
5
D D MONITOR AUDIBLE FUNCTION
The monitor function allows you to open the transceiver’s squelch
manually to check whether a channel is busy or not. The trans-
ceiver has 2 conditions for receive standby:
Audible condition:
This condition mutes audio ONLY when
no carrier is present. You can receive (or
monitor) any signals on a channel.
• Push and hold the [MONI], switch to se-
lect the audible condition.
Any audio mute functions are cancelled
while pushing the [MONI] switch.
Inaudible condition:
This condition mutes ALL signals except
those directed to you. Therefore you
should check a channel’s condition (busy
or not) with the monitor function before
transmitting.
• Push the [MONI] switch momentarily to
select the inaudible condition.
D D 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 selects receive.
• The time-out timer function is automatically turned ON when 3
min. has passed.
D D POWER SAVE FUNCTION
The power save function reduces the current drain to conserve bat-
tery power.
• The power save function is automatically turned ON when no
operation is performed or no signal is received for 5 sec.
All signals are
received
Only signals con-
taining the proper
tone are received