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Icom IC-F521 - Receiver Mute Circuits

Icom IC-F521
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TALK AROUND KEY
Turns the talk around function ON and OFF.
The talk around function equalises the transmit
frequency to the receive frequency for mobile-
to-mobile communication.
CALL KEYS
Transmit a 2-tone code.
Call transmission is necessary before you call
another station depending on your signaling
system.
EMERGENCY KEY
Push and hold the key to transmit an emergency
call.
If you want to cancel the emergency call, push
(or push and hold) the key again before trans
-
mitting the call.
The emergency call is transmitted one time
only or repeatedly until receiving a control code
depending on the pre-setting.
[ T A ]
[CALL]
[EMER]
TX CODE CHANNEL UP/DOWN KEY
Push to selects a TX code channel directory.
DTMF CHANNEL SELECT KEY
Push this key to select a DTMF channel.
Push this key, then select the desired DTMF
channel using the [
]/[ ] keys.
Push the key to transmit the selected DTMF
code.
C. TONE CHANNEL ENTER KEY
Push this key then input a continuous tone
memory channel number using [
]/[ ] keys
to change the tone frequency.
[CODE]
[DTMF]
[TONE]
5
1
PANEL DESCRIPTION

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