Cessna TURBO CENTURION T210M 1978 Pilot Operating Handbook page 227

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PILOT'S OPERATING HANDBOOK
SUPPLEMENT
CESSNA 300 NAV/COM
(TYPE RT-385A)
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 VOX (Voice) position, identifier signal is sup-
pressed; in T (Momentary On) position, the VOR navigational self-test function is
selected.
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NAVIGATION RECEIVER FRACTIONAL MEGAHERTZ SELECTOR - Selects
Nav frequency in .05-MHz steps between .00 and .95 MHz; simultaneously selects
paired glide slope frequency and DME channel.
NAV VOL CONTROL - Adjusts volume of navigation receiver audio.
NAVIGATION RECEIVER MEGAHERTZ SELECTOR - Selects NA V frequency
in 1-MHz steps between 108 and 117 MHz; simultaneously selects paired glide
slope frequency and DME channel.
COMMUNICATION RECEIVER-TRANSMITTER FRACTIONAL MEGAHERTZ
SELECTOR - Depending on position of 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 0.
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.
COMMUNICATION RECEIVER-TRANSMITTER MEGAHERTZ SELECTOR -
Selects COM frequency in 1-MHz steps between 118 and 135 MHz.
COM OFF-VOL CONTROL - Combination on/off switch and volume control;
turns on NA V / COM set and controls volume of communications receiver audio.
BC LAMP - Amber light illuminates when the autopilot or reverse sense option
is installed and the reverse sense switch or autopilot's b ack-course function is
engaged; indicates course deviation pointer is reversed on selected receiver when
tuned to a localizer frequency.
13. COURSE INDEX - Indicates selected VOR course.
14. COURSE DEVIATION POINTER - Indicates course deviation from selected
omni course or localizer centerline .
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15. GLIDE SLOPE " GS" FLAG - When visible, red GS flag indicates unreliable glide
slope signal or improperly operating equipment. Flag disappears when a reliable
glide slope signal is being received.
16. GLIDE SLOPE DEVIATION POINTER - Indicates deviation from ILS glide
slope.
17. NA V /TO-FROM INDICATOR - Operates only with a VOR or localizer signal.
,,..--, Red NA V position (Flag) indicates unusable signal. With usable VOR signal,
indicates whether selected course is TO or FROM station. With usable localizer
signal, shows TO.
Figure 1. Cessna 300 Nav/Com (Type RT-385A), Operating Controls
and Indicators (Sheet 3 of 3)
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