Icom IC-F3021T/S Instruction Manual page 12

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PANEL DESCRIPTION
PRIO A/B KEYS
➥ Push to select Priority A or Priority B channel.
➥ Push and hold [Prio A (Rewrite)] or [Prio B (Rewrite)] for
1 sec. to reassign the operating channel to Priority A or
Priority B channel.
MR-CH 1/2/3/4 KEYS
Push to select memory channels 1 to 4 in the operating zone
directly.
MONI KEY
Mute and release the CTCSS (DTCS) or 2-tone squelch
mute. Open any squelch/deactivate any mute while pushing
and holding this key.
LOCK KEY
➥ Push and hold for 1 sec. to electronically lock all program-
mable keys except the following:
[Call] (incl. Call A and Call B), [Moni], [Emergency],
[Surveillance], [Siren], [Lone Worker] and [OPT 1/2/3].
➥ Push and hold for 1 sec. again to turn the lock function OFF.
HIGH/LOW KEY
Push to select the transmit output power temporarily or per-
manently, depending on the pre-setting.
• Ask your dealer for the output power level for each selection.
C.TONE CH ENT KEY
Push to select the continuous tone channel using [CH Up]/
[CH Down] to change the tone frequency/code setting. The
selected channel remains set as the continuous tone chan-
nel until another channel is designated as such.

TALK AROUND KEY
Push to turn the talk around function ON and OFF.
• The talk around function equalizes the transmit frequency to the
receive frequency for transceiver-to-transceiver communication.
WIDE/NARROW KEY
Push to toggle the IF bandwidth between wide and narrow.
DTMF AUTODIAL KEY
➥ Push to enter the DTMF channel selection mode. Then
select the desired DTMF channel using [CH Up]/[CH
Down].
➥ After selecting the desired DTMF channel, push this key
to transmit the DTMF code.
RE-DIAL KEY
Push to transmit the last-transmitted DTMF code.
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.
LONE WORKER KEY
Push to turn the Lone Worker function ON or OFF.
• If the Lone Worker function is activated, the Emergency function is
automatically turned ON after the specified time period has passed
with no operation is performed.