COMMUNICATIONS, UHF COM
Operation
Aircraft Operations Manual
4/6.2
O
PAGE
3
Apr 01/15
CONDITIONS
NORMAL PROCEDURES
(Cont’d)
7.
CHAN button
PRESS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Momentarily press the CHAN button to exit the program mode (or wait for
20 seconds).
2.6
REMOVING
PRESET CHAN-
NELS
1.
CHAN button (COM control unit)
PRESS AND HOLD
. . . . . . . . . . . . . . . . . .
−
Press and hold (about two seconds) the CHAN button until the top display
line contains either the letter “P” followed by the channel number, or “GdP”
for the Guard channel.
2.
Channel selector
TURN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Use the channel selector knobs to change the channel number.
3.
MODE button
PRESS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Momentarily press the MODE button until the frequency display begins to
flash.
4.
Frequency selector
SET FREQUENCY
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Rotate the frequency selector knobs to change the MHz portion of the fre-
quency to 225 or 399. Decrement one step from 225 or increment one step
from 399 and the display will show dashes in the frequency display.
5.
CHAN button
PRESS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Momentarily press the CHAN button to remove the channel as a preset and
exit the program mode.
Selecting a new channel number will also remove the channel as a preset.
NOTE
2.7
PRESET
CHANNEL SE-
LECTION
The CHAN button is used to toggle the radio between manual and preset
channel selection. To select a preset or guard frequency:
1.
CHAN button
PRESS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Momentarily press the CHAN button until the channel number display (top
line) displays either “CH” followed by a number or “Gd”.
2.
Channel selector
TURN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Turn either knob to cycle through the available channels. Only pro-
grammed channels will be displayed. The Guard channel is located be-
tween the highest and lowest numbered programmed frequencies.