Cessna 1980 182Q Pilot's Operating Handbook And Flight Manual page 342

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CESSNA 400 NAV/COM
(RT-485A) WITH CESSNA
400 RNAV (RN-478A)
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
COMMUNICATIONS OPERATION:
1.
COM OFF/VOL Control-- TURN ON.
2. XMTR SEL Switch (on audio control panel) -- SET to No. 240
Nav/Com.
3. SPEAKER/PHONE Selector Switches (on audio control panel) --
SET to desired mode.
4. COM Frequency Selection -- SELECT desired operating frequency
by either pressing a COM MEMORY 1,2 or 3 pushbutton to recall a
preset frequency, or by manually selecting the desired operating
frequency using the COM frequency selectors and C pushbutton.
5. VOL Control -- ADJUST to desired audio level.
6. SQ Control -- ROTATE counterclockwise to just eliminate back-
ground noise.
7. Mike Button:
a. To Transmit -- DEPRESS and SPEAK into microphone.
NOTE
Sidetone may be selected by placing the AUTO selector
switch (on audio control panel) in either the SPEAKER or
PHONE position, or may be eliminated by placing the
AUTO selector switch in the OFF position. Adjustment of
sidetone on audio control panels supplied with three
transmitters cannot be accomplished externally. How-
ever, audio control panels supplied with two or less
transmitters have sidetone adjustment pots that are
accessible through the front of the audio control panel with
a small screwdriver.
b. XMIT Annunciator Light -- CHECK ON (green light illumi-
nated).
c. To Receive -- RELEASE mike button.
NAVIGATION OPERATION:
NOTE
The pilot should be aware that on many Cessna airplanes
equipped with the windshield mounted glide slope
antenna, pilots should avoid use of 2700
±lOO
RPM on
airplanes equipped with a two-bladed propeller or 1800
±lOO
RPM on airplanes equipped with a three-bladed
propeller during ILS approaches to avoid oscillations of
the glide slope deviation pointer caused by propeller
interference.
1.
COM OFF /VOL Control-- TURN ON; adjust to desired audio level.
. 2. SPEAKER/PHONE Selector Switches (on audio control panel) --
SET to desired mode.
8 1 October 1979