I Lock Function; I Signal Strength Indicator Function; I Monitor Function; I Backlighting Function - Icom IC-GM1600 Instruction Manual

I Lock function

This function electronically locks all keys (except for [PTT],
[SQL• ] and [Hi/Lo• ]) to prevent accidental channel
MONI
changes and function access.
➥ Push [Hi/Lo•
] for 1 sec. to turn the lock function ON
and OFF.
Push
for 1 sec.
Appears while the lock
function is used.
I Signal strength indicator
The received signal strength level is indicated by number of
bars as below.
• Only the antenna mark appears when receiving no signal or a very
weak signal when the signal strength indicator is set to ON in the
SET mode (p. 14).
• This indicator can be hidden by using the SET mode (p. 14) if de-
sired.
Indication
Signal
Strong Middle
strength
No signal or
Weak
Very weak

I Monitor function

The monitor function releases the noise squelch mute to
check the volume level. See p. 12 for details of the monitor
switch action.
➥ Push [SQL•
] for 1 sec. and keep holding to activate
MONI
the monitor function.
• " " appears and audio is emitted.

I Backlighting function

This function is convenient for nighttime operation. The back-
lighting brightness can be adjusted in the SET mode. (p. 12)
➥ Push any key except for [PTT] to turn the backlighting ON.
• The backlighting is automatically turned OFF after 5 sec. of
inactivity.
I VOX function
(FOR ON-BOARD USE ONLY)
The VOX function (voice operated transmission) starts trans-
mission without pushing [PTT] when you speak into the mi-
crophone; then automatically returns to receive when you
stop speaking (hands-free operation becomes possible).
NOTE: An optional headset and headset adapter (OPC-
1392) is required for the VOX operation.
➥ Push and hold [SQL•
MONI
the VOX function ON/OFF while connecting the optional
headset and headset adapter to the [MIC/SP] connector.
• "VOX" appears on the LCD while the VOX function is ON.
• The "VOX gain" and "VOX delay" can be set in the SET mode.
(pgs. 14 and 15)
BASIC OPERATION
], then push [Hi/Lo• ] to turn
4
4
10