Icom IC-A22 Instruction Manual page 28

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6 VOR NAVIGATION
i Duplex operation
(U.S.A. version only)
The duplex function allows you to call a flight service station
while receiving a VOR station. The duplex function requires
frequency programming for the flight service station in
advance,
© Programming a duplex frequency
@ Push [CLR] to select frequency mode.
@ Set a NAV band frequency using the tuning dial or
keypad,
* NAV band frequency range: 108.00-117.975 MHz.
@ Push [F] then [© DUP-W}.
* "DUP-W" blinks and transmit frequency appears.
@ Set the frequency of the flight service station using the
tuning dial or keypad. When using the tuning dial, push
{ENT] after setting a frequency.
* The displayed frequency returns to the NAV band frequency.
© Operating the duplex function
@ Set the desired frequency in NAV band.
* NAV band frequency range: 108.00-117.975 MHz.
@® Push [F] then [© DUP] to turn the duplex function ON.
"DUP" appears on the function display.
@ Push and hold [PTT] to transmit at the pre-programmed
transmit frequency.
@ Release [PTT] to return to receive,
© Push [F] then [© DUP] to cancel the function.
A duplex frequency can be programmed into each
memory channel independently. Set a duplex frequency
before programming the memory channel, if desired.
The duplex ON/OFF setting can also be programmed
into a memory channel.
WWI
EXAMPLE: Programming 123.65 MHz as the transmit frequency in the duplex function.
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