Cessna 152 - Page 200

CESSNA 300 NAV /COM
(TYPE RT-385A)
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
SECTION 4
NORMAL PROCEDURES
COMMUNICATION RECEIVER-TRANSMITTER OPERATION:
1. COM OFF /VOL Control -- TURN ON; adjust to desired audio level.
2. XMTR SEL Switch (on audio control panel) -- SET to desired
Nav/Com Radio.
3. SPEAKER/PHONE (or AUTO) Switch (on audio control panel) --
SET to desired mode.
4. 5-0 Fractional MHz Selector Switch -- SELECT desired operating
frequency (does not affect navigation frequencies).
5. COM Frequency Selector Switch -- SELECT desired operating
frequency.
6. SQ Control -- ROTATE counterclockwise to just eliminate back-
ground noise. Adjustment should be checked periodically to
assure optimum reception.
7. Mike Button:
a. To Transmit -- DEPRESS and SPEAK into microphone.
NOTES
When the transmitter/audio switching panel without
marker beacon is installed, sidetone is available in both
the SPEAKER and PHONE position. A SIDETONE VOL
control is provided that may be used to adjust or suppress
speaker sidetone.
When the audio control panel with marker beacon is
installed, sidetone may be selected by placing the AUTO
selector switch in either the SPEAKER or PHONE posi-
tion. Adjustment of sidetone may be accomplished by
adjusting the sidetone pot located inside the audio control
panel.
b. To Receive -- RELEASE mike button.
NAVIGATION OPERATION:
6
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 ± 100 RPM on
airplanes equipped with a two-bladed propeller or 1800 ±
100 RPM on airplanes equipped with a three-bladed pro-
peller during ILS approaches to avoid oscillations of the
1 July 1978