AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
JUNE 29, 2001
2-18-21
Page
9
Code
02
7 - PROGRAM SWITCH
− Used on the 99 user-programmed channels programming.
8 - LARGER CONCENTRIC KNOB
− Moves the “cursor” which selects the digit of the frequency to be
changed.
9 - SMALLER CONCENTRIC KNOB
− Increments or decrements the frequency digit under the “cursor”
(flashing digit).
10 - STORE SWITCH
− Used to store data when programming the user programmable
channels.
11 - POWER AND VOLUME KNOB
− Turns the system on and off and controls volume. Clockwise
rotation past the first click turns the system on. Further rotation
increases audio level. After turning on, the system takes about
two minutes to warm up. Until then, no frequencies are
displayed.
12 - SQUELCH KNOB
− Reduces background noises when rotated counterclockwise.
Must be set by rotating the knob clockwise until background
noise can be heard and then turning it counterclockwise until
background noise is eliminated or barely audible.
13 - CLARIFIER KNOB
− Clarifier is used only in SSB communications, and is not
applicable to AM mode;
− It must be used when due to off frequency ground station
transmissions the audio voice quality from KHF-950 may sound
unnatural;
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