COMMUNICATIONS, VHF COM
Description
Aircraft Operations Manual
4/3.1
K
PAGE
2
Apr 01/15
KING
3.
CONTROLS AND INDICATORS
A
Large knob
−
Controls the three left digits
in 1 MHz steps.
Small knob
−
Controls the two (three) right digits
in 50 kHz steps and in 25 (8.33)
kHz steps when the knob is pulled
out.
When selecting XXX.X25 or XXX.X75, only 2 or 7
will be displayed.
When momentarily pressed:
−
Standby frequency moves to upper display
and becomes active. Former active frequency
moves to lower display and becomes standby.
When depressed for more than 2 sec:
−
Standby frequency display goes off.
Frequency selectors control active frequency
display.
When pressed again momentarily:
−
Standby frequency displayed again and func-
tion back to normal.
Frequency display.
UPPER
−
Displays active frequency. When
transmitting, a T is displayed at the
right of the active frequency display.
Lower
−
Displays standby (SBY) frequency.
NOTE: With Mod. No. 2938 installed, three
decimal digits will be shown.
PULL TEST knob.
−
When switch is pulled the squelch
becomes disabled.
−
Knob pushed in the squelch becomes
active again.
Photocell.
Controls display brightness.
Frequency selector.
Transfer button.
A21308
T
S
B
Y
COM CONTROL UNIT
PULL
TEST
A
Fig. 2 VHF COM
−
controls