V A L A V I O N I C S L T D
C O M 2 0 0 0 – V H F T R A N S C E I V E R
I N S T A L L A T I O N A N D O P E R A T O R ’ S M A N U A L
Revision 3
Page 12 of 31
March 2013
3.1.3.1
Turning the unit on/off
To turn the unit on, momentarily press the left hand inner knob. The unit will go through a short initialization
routine at start up and then begin operation at the same settings that were loaded at the last power down. To turn the
unit off, press and hold the left inner knob for three seconds.
3.1.3.2
Setting Active and Standby Frequency
The knob functions of the right hand set are as follow; the inner knob will change the frequency by KHz or the
numbers to the right of the decimal point (118.
125
) in 25kHz increments. The outer knob will change the frequency
by MHz or the numbers to the left of the decimal point (
119
.125) in 1 MHz increments. Only the frequency in the
standby position will change. The standby frequency is displayed at the bottom on the left side of the display and is
identified by the letter “S” to the left of the frequency (
S
108.15). To load the standby frequency in to the active
position, momentarily press on the inner knob. This will swap the standby frequency with the active frequency. The
active frequency is identified by the letter “A” at the left of the frequency display (
A
118.125).
3.1.3.3
Changing the Volume
Rotating the left hand inner knob controls the receiver’s audio volume. “
VOL
” will be displayed in the standby
frequency display and the volume level is indicated by the numeric value after “
VOL
” (i.e. “
VOL 15”
). The
volume level can be adjusted from
0
to
20
by rotating the left hand inner knob. Normal display operation resumes
after 2 seconds.
3.1.3.4
Changing the Minimum Received Signal Level (Squelch)
Rotating the left hand outer knob controls the receiver’s internal signal strength cutoff (Squelch). “
SQL
” will be
displayed in the standby frequency display and the volume level is indicated by the numeric value after “
SQL
” (i.e.
“
SQL 15”
). The squelch level can be adjusted from
OFF
to
20
by rotating the left hand inner knob. Normal
display operation resumes after 2 seconds.
3.1.3.5
Selecting a Stored Memory Station
A quick push of the left hand knob enters the stored station retrieval. If no memory stations are available, the
display will show “
NO MEM”
and return to normal operation. Rotating the inner left hand knob scrolls through the
previously entered memory stations. In the left side (previously the active display) the pre-programmed label will
be shown, and the right side (previously the standby display) will show the associated frequency. Once the desired
frequency is displayed, a quick push of the left hand knob will cause the selected frequency to be loaded into the
Standby window and the unit will return to normal operation. To exit without selecting a memory frequency, just
wait 5 seconds without twisting any knob and the display will return to normal, or push the right hand knob to exit
instantly.
3.1.3.6
Entering / Editing / Deleting a Stored Memory Station
Val Avionics does not recommend entering or editing stored frequencies in flight. Doing so can be a distraction to
the pilot.
