Icom IC-F1721 Instruction Manual page 9

PUBLIC ADDRESS KEY
While in the hailer mode, push this key for the audio output
via the hailer amplifier. Ask your dealer for details.
While in the normal mode, the audio output via the cable can
be controlled from the transceiver separately from [VOL] con-
trol knob when an optional OPC-617
• This audio output can be used as a 'public address' function when
an external audio amplifier and speaker are connected additionally.
• Push this key, then speak into the microphone while pushing the
PTT switch.
• [CH Up]/[CH Down] allow you to set the audio output level from min-
imum to maximum.
RX SPEAKER KEY
While in the hailer mode, the external speaker drive function
is also available simultaneously when the external connec-
tions are made for the 'public address' function. The received
audio can be heard via the external speaker when this key is
pushed.
• This function is useful when you are out of the vehicle.
• The audio output level is linked to the transceiver's volume control.
LIGHT KEY
Push to turn the transceiver's backlight ON temporarily when
the backlight function is turned OFF in user set mode.
LOCK KEY
Push and hold to electronically lock all programmable keys
except the following:
[Call] (incl. Call A and Call B), [Moni(Audi)] and [Emergency].
is installed.
ACC CABLE
PANEL DESCRIPTION
OUTPUT POWER SELECTION 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 CHANNEL ENTER KEY
Push to select the continuous tone channel using [CH Up]/
[CH Down] to change the tone frequency/code setting after
pushing this key. The selected channel remains set as the
continuous tone channel until another channel is designated
as such.
TALK AROUND KEY
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.
• The wide passband width can be selected from 25.0 or 20.0 kHz
using the CS-F1700
CLONING SOFTWARE
tion only) Ask your Dealer for details.
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.
1
. (PMR or BIIS PMR opera-
1
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