Icom IC-F4022T 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 5-tone squelch
mute. Open any squelch/deactivate any mute while pushing
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] and [Emergency].
➥ 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 set-
ting. The selected channel remains set as the continuous
tone channel until another channel is designated as such.
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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 5-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.