Icom IC-F3021 / F4021 Instruction Manual - Page 13

PANEL DESCRIPTION 2 CALL KEYS TX CODE CHANNEL UP/DOWN KEYS Push to transmit a 2-tone. Push to select a TX code channel directly. •Call transmission is necessary before you call another station 2 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 SCRAMBLER FUNCTION Push to toggle the voice scrambler function ON and OFF. assigned to each key. USER SET MODE KEY EMERGENCY KEY Push and hold for a specified period to transmit an emergency call. • If you want to cancel the emergency call, push (or push and hold) the key again before transmitting the call. ➥ 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. • The emergency call is transmitted one time only or repeatedly until User set mode is also available via the 'Power ON function.' receiving a control code depending on the pre-setting. Refer to (p. 14) also. 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. 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. 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) 9