COMMUNICATIONS, VHF COM
Description
Aircraft Operations Manual
4/3.1
C
PAGE
2
Apr 01/15
COLLINS PRO LINE II
3.
CONTROLS AND INDICATORS
Photocell
Controls display brightness.
Frequency display
Upper display
−
Active frequency (ACT).
Lower display
−
Standby frequency.
NOTE:
With Mod. No. 2938 installed, three decimal digits will be shown.
MEM
−
Memory frequencies available
TX
−
Indicates transmitting.
XFR/MEM switch
When switched momentarily to:
XFR
−
Standby frequency moves to upper displayand
becomes active.
−
Former active frequency moves to lower display
and becomes standby.
−
A tone will be heard when interchanging the
active/standby frequencies.
MEM
−
Steps through the six preprogrammed
frequencies.
−
After frequency choice, set XFR/MEM switch to
XFR position to activate memory frequency.
Function selector
NORM
−
Squelch function active.
SQ OFF
−
Squelch function disabled.
Frequency selector
Large knob
−
Controls the three left digits
in 1 MHz steps.
Small knob
−
Controls the two (three) right digits in
50 kHz steps or 25 (8.33) kHz steps for the
first two steps after the direction of rotation
has been reversed.
When selecting XXX.X25 or XXX.X75, only 2 or 7
will be displayed.
ACT button
When depressed for more than 2 seconds:
−
Standby frequency display goes off.
Frequency selector controls active frequency display.
For return to normal:
−
Depress for more than 2 seconds.
TEST button
When momentarily pressed:
−
Control unit enters and displays Diagnostic Fail Code
mode.
−
Two tones will be heard.
(For maintenance purpose).
STO button
Select memory cell to program (CH.
−
) with XFR/
MEM switch then momentarily press STO button:
−
Control unit enters Program mode.
−
Set up frequency with frequency selector.
−
Press STO button to store frequency.
−
XFR/MEM switch for next memory cell (CH.
−
)
−
No activation for 3 sec, returns display to normal.
C0806
A
A
COM
COLLINS
MEM
XFR
MEM
NORM OFF
STO
TEST
ACT
TX
A
C
T
SQ
COM CONTROL UNIT
WITH MEMORY
Fig. 2 VHF COM
−
controls
