COMMUNICATIONS, UHF COM
Description
Aircraft Operations Manual
4/6.1
O
PAGE
2
Apr 01/15
3.
CONTROLS AND INDICATORS
A28637
ON/OFF/VOL/TEST knob.
ON/OFF
−
Selects tranceiver and
controlunit ON/OFF.
VOL
−
Volume control. This
function can also be
operated from the ACP.
TEST
−
When momentarily
pressed, alternately
disables and enables
the squelch.
Channel number display.
Frequency display.
CHAN button.
When pressed momentarily, selections
between preset channel mode or
manually selected frequency mode is
provided.
When pressed and held, the program-
ming mode for channels is activated.
Frequency/Channel select.
Receive Mode select.
Each momentary press cycles
through the following modes:
MAIN
−
Allows transmitting and
receiving on the selected
frequency. The guard
receiver is not active.
BOTH
−
Same as MAIN exept that
guard receiver is active.
Photocell.
Receive Mode annunciation.
MN
−
Displayed when the MAIN or
the BOTH mode is selected
as receive mode.
GD
−
Displayed when the BOTH
mode is selected as
receive mode.
Transmit annunciation.
PUSH TONE button.
Press and hold this button to activate
a 1 kHz tone transmitter test.
M
O
D
E
BENDIX/KING
TX
MN
GD
UHF
VOL
PUSH
TEST
OFF
CHAN
A
UHF COM CONTROL UNIT
A
Fig. 2 UHF COM
−
controls