AIRCRAFT
SA160
AIRCRAFTA I R C R A F T
Symphony
SECTION 9
SUPPLEMENT 2
WPT
DTK
ETE
DIS
COM
GS
TERM
01:12
Figure 7-1
Front View of the GNC 420 Unit
(a)Key and Knob Functions
(1)UnitKeysandKnobs(Excludingbottom row)
TheCOM power/volume knob controls unit power and
communications radio volume. Press momentarily to enable/disable
automativsquelchcontrol.
Thelargeleftknob is used to tune the megahertz (MHz) value of
thestanbyfrequencyfortheCOMtransceiver.
Thesmallleftknob is usedto tuned the kilohertz (kHz)value of
thestanbyfrequencyfortheCOMtransceiver.
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Feb 25, 2005