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Using the Headset Microphone
If you want to use the microphone of an aviation
headset prepared by yourself, change the assign-
ment of microphone controlled with the PTT switch.
To assign the headset microphone, select "EXT
Mic" on the item "Mic Select" of the COMM Setup
menu in the SETUP mode.
When an optional aviation headset is connected,
the PTT switch on the radio will activate the headset
microphone for transmission.
48
Note:
If you find it difficult to use the PTT switch of the radio,
we recommend to use an aftermarket external PTT
switch. See page 89 for details.
Side Tone Control
When utilizing an external headset, you may monitor
your own voice talking to the microphone through
the headphone.
Note:
Do not activate the side tone function when connect-
ing the optional microphone SSM-20A.
To activate the monitoring of your voice (side tone),
select one of the following side tone level on the
item "Side Tone" of the COMM Setup menu in the
SETUP mode.
OFF / MIN / Level1 / Level2 / MAX
To change the side tone level temporarily during
the monitoring, rotate the DIAL knob when press-
ing and holding the PTT switch.
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