Cessna 1980 182Q Pilot's Operating Handbook And Flight Manual page 276

18
CESSNA 300 NAV/COM
(RT-385A) WITH CESSNA
400 RNAV (RN-478A)
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
3. NAVIGATION OPERATING FREQUENCY READOUT.
4. ID-VOX-T SWITCH - With VOR or LOC station selected, in ID position, station
identifier signal is audible; in center VOX (Voice) position, identifier signal is
suppressed; in T (Momentary On) position, the VOR navigational self-test
function is selected.
5. NAVIGATIONAL RECEIVER FRACTIONAL MEGAHERTZ FREQUENCY
SELECTOR - Selects NA V frequency in .05 MHz steps between .00 and .95 MHz;
simultaneously selects paired glide slope frequency and DME channel.
6. NA V VOLUME CONTROL (VOL) - Adjusts volume of navigation receiver audio.
Clockwise rotation increases audio level.
7. NAVIGATION RECEIVER MEGAHERTZ FREQUENCY SELECTOR - Selects
NA V frequency in I-MHz steps between 108 and 117 MHz; simultaneously selects
paired glide slope frequency and DME channel.
8. COMMUNICATION RECEIVER-TRANSMITTER FRACTIONAL MHz FRE-
QUENCY SELECTOR - Depending on position of the 5-0 Switch, selects COM
frequency in .05 MHz steps between .000 and .975 MHz. The 5-0 switch identifies the
last digit as either 5 or O.
9. SQUELCH CONTROL - Used
to
adjust signal threshold necessary to activate
COM receiver audio. Clockwise rotation increases background noise (decreases
squelch action); counterclockwise rotation decreases background noise.
10. COMMUNICATION RECEIVER-TRANSMITTER MHz FREQUENCY
SELECTOR - Selects COM frequency in 1 MHz steps between 118 and 135 MHz.
11. COM OFF-VOL CONTROL - Combination on/off switch and volume control;
turns on NAV/COM Set and RNAV Computer circuits; controls volume of
communication receiver audio.
12. COURSE CARD - Indicates selected VOR course under course index.
13. BACK COURSE LAMP (BC) - Amber light illuminates when an autopilot with
reverse sense feature is installed and the reverse sense switch or the autopilot's
back-course function is engaged and receiver is tuned to a localizer frequency;
indicates course deviation pointer is reversed. BC light dimming is only available
when installed with an audio control panel incorporating the annunciator lights
DA Y / NITE selector switch.
14. AREA
:'I:
AV LAMP (RN) - When green light is illuminated. indicates that RNA V
operatIOn is selected. RN light dimming is only available when installed with an
audlO control panel incorporating the annunciator lights DAY /NITE selector
sWItch.
15. OM~I BEARING SELECTOR (OBS) - Rotates course card (12) to select desired
bearing to or from a VOR station or to a selected RNA V waypoint.
Figure
1.
Cessna 300 Nav/Com Set, Operating Controls and Indicators
(Sheet 2 of 3)
4
1 October 1979