Cessna Hawk XP R172K Pilot Operating Handbook page 91

CESSNA 300 NA V/COM
(TYPE RT-308C)
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CESSNA 300 NAV/COM
(TYPE RT-308C)
1. RECEIVER-TRANSMITTER FREQUENCY INDICATOR.
2. NAVIGATION RECEIVER FREQUENCY INDICATOR.
3. SQUELCH CONTROL - Used to adjust signal threshold
necessary to activate communication receiver audio.
Clockwise rotation increases background noise (decreases
squelch action); counterclockwise rotation decreases
background noise.
4. COMMUNICATIONRECEIVER-TRANSMITTER MEGA-
HERTZ SELECTOR - Selects communication
receiver-transmitter frequency in 1-MHz steps between
118 and 135 MHz.
Figure 1. Cessna 300 Nav/Com (Type RT-308C) - VOR only (Sheet 1 of 2)
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5. OFF/ON VOLUME CONTROL - Turns complete set on
and controls volume of audio from communication r e-
cei ver. Clockwise rotation increases audio level.
6. COMMUNICATIONRECEIVER-TRANSMITTER FRAC-
TIONAL MEGAHERTZ SELECTOR - Selects communi-
cation receiver-transmitter fractional frequency in
0.05 MHz steps between 0.00 and 0.95 MHz.
7. NAVIGATION RECEIVER MEGAHERTZ SELECTOR-
Selects navigation receiver frequency in 1-MHz steps
between 108 and 117 MHz.
8. NAVIGATION RECEIVER VOLUME CONTROL - Con-
trols volume of audio from navigation receiver only.
Clockwise rotation increases audio level.
9. NAVIGATION RECEIVER FRACTIONAL MEGAHERTZ
SELECTOR - Selects navigation receiver frequency
in 0.05 MHz steps between 0.00 and 0.95 MHz.
10. COURSE DEVIATION POINTER - Indicates deviation
from selected omni bearing.
11. OFF/TO-FROM (OMNI) INDICATOR - Operates only
with VOR signal. "OFF" position (flag) indicates
unreliable signal or no signal (shows OFF when localizer
frequency is selected). When "OFF" position disappears,
indicator shows whether selected course is "TO" or
"FROM" VOR station.
12. RECIPROCAL COURSE INDEX - Indicates reciprocal
of selected VOR course.
13. OMNI BEARING SELECTOR (OBS) - Selects desired
course to or from a VOR station.
14. BACK COURSE (BC) INDICATOR LIGHT (On IN-514B
Only) - Not used with this radio.
15. BEARING DIAL - Rotated by OBS to select course at index.
16. COURSE INDEX - Indicates selected VOR course.
Figure 1. Cessna 300 Nav/Com (Type RT-308C) - VOR only (Sheet 2 of 2)
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