Duplex Operation - Icom IC-A23 Instruction Manual

6
VOR NAVIGATION

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 ad-
vance.
◊ Programming a duplex frequency
q Push [CLR] to select frequency mode.
w Set a NAV band frequency using the tuning dial or keypad.
• NAV band frequency range: 108.00–117.975 MHz
e Push
, then [5 (DUP-W)].
• "DUP" flashes and transmit frequency appears.
r Set the frequency of the flight service station using the tun-
ing dial or keypad. When using the tuning dial, push [ENT]
after setting a frequency.
• The displayed frequency returns to the NAV band frequency.
EXAMPLE: Programming 123.65 MHz as the transmit frequency in the duplex function.
24
◊ Operating the duplex function
q Set the desired frequency in NAV band.
• NAV band frequency range: 108.00–117.975 MHz
w Push
, then [6 (DUP)] to turn the duplex function ON.
• "DUP" appears on the function display.
e Push and hold [PTT] to transmit at the pre-programmed
transmit frequency.
r Release [PTT] to return to receive.
t Push
, then [6 (DUP)] to cancel the function.
A duplex frequency can be programmed into each mem-
ory 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.