Icom IC-F4021 [13/32] Panel description

PANEL DESCRIPTION

CALL KEYS

Push to transmit a 2-tone.

•Call transmission is necessary before you call another station

depending on your signaling system.

•[Call A] and/or [Call B] may be available when your system employs

selective ‘Individual/Group’ calls. Ask your dealer which call is

assigned to each key.

EMERGENCY KEY

Push and hold for a specified period to transmit an emer-

gency call.

• If you want to cancel the emergency call, push (or push and hold)

the key again before transmitting the call.

• The emergency call is transmitted one time only or repeatedly until

receiving a control code depending on the pre-setting.

SURVEILLANCE KEY

Push to turn the surveillance function ON or OFF.

When this function is turned ON, the beep is not emitted and

the LCD backlight does not light when a signal is received or

a key is pushed, etc.

SIREN KEY

Push to emit a siren.

TX CODE CHANNEL SELECT KEY

Push to enter the ID code channel selection mode directly.

Then set the desired channel using [CH Up]/[CH Down].

(p. 13)

TX CODE CHANNEL UP/DOWN KEYS

Push to select a TX code channel directly.

SCRAMBLER FUNCTION

Push to toggle the voice scrambler function ON and OFF.

USER SET MODE KEY

➥ Push and hold for 1 sec. to enter user set mode.

• During user set mode, push this key to select an item, and

change the value or condition using [CH Up]/[CH Down].

➥ Push and hold this key for 1 sec. again to exit user set

mode.

User set mode is also available via the ‘Power ON function.’

Refer to (p. 14) also.

OPT OUT KEYS

Push to control the output signal level of the optional ports in

the optional unit connector.

OPT MOMENTARY KEYS

Controls the output signal level of the optional ports in the

optional unit connector while pushing and holding this key.