Icom IGM1600 Lock function, Signal strength indicator, Monitor function, Backlighting function

■Lock function

This function electronically locks all keys (except for [PTT], [SQL•MONI] and [Hi/Lo• ]) to prevent accidental channel 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.

■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	Weak	No signal or
strength				Very weak

BASIC OPERATION 4

■ 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•MONI] for 1 sec. and keep holding to activate 4

the monitor function.

• “ ”appears and audio is emitted.

■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.

■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], then push [Hi/Lo• ] to turn 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)

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