TM 55-1520-228-10
CONTROL/INDICATOR FUNCTION
1 Function Selector
OFF .............................................................. Power off.
T/R................................................................ Receiver - On; Transmitter - Standby.
T/R GUARD.................................................. Receiver - On; Transmitter - Standby;
Guard Receiver - On.
NOTE: Reception on guard frequency is unaffected by
frequencies selected for normal communications.
D/F................................................................ Not used.
RETRAN....................................................... Not used.
2 Frequency Selectors
Left Selector ................................................. Selects first three digits of desired frequency.
Right Selector............................................... Selects fourth, fifth and sixth digits of desired frequency.
3 RCVR TEST......................................................... When pressed, audible signal indicates proper receiver
performance.
4 AUDIO.................................................................. Adjusts receiver volume.
5 SQUELCH............................................................ Squelch control adjusted by maintenance personnel
only.
206075-258
Figure 3-4. AN/ARC-115 Control Panel
3-9
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