CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY
MODEL 152 9-12
Figure 1. Cessna 300 Nav/Com (Type RT-308C) – VOR only
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. COMMUNICATION RECEIVER-TRANSMITTER MEGAHERTZ SELECTOR – Selects communication
receiver-transmitter frequency in 1-MHz steps between 118 and 135 MHz.
5. OFF/ON VOLUME CONTROL – Turns complete set on and controls volume of audio from
communication receiver. Clockwise rotation increases audio level.
6. COMMUNICATION RECEIVER-TRANSMITTER FRACTIONAL MEGAHERTZ SELECTOR – Selects
communication 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 – Controls 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.
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