TEST PROCEDURE 050
RADIO SET AN/PRC-77 SERIES
This procedure provides a description of special test equipment, fixturing, cabling, instrumentation and instructions for
performing inspections and evaluations applicable to the Radio Set AN/PRC-77, which consists of the following type
Bag, Cotton Duck CW-503/PRC-25
Battery Box CY-2562/PRC-25
Support Antenna AB-591A/PRC
Receiver-Transmitter Radio RT-841/PRC-77
Handset H-189/GR may be used in lieu of H-189/GR
Harness, Electrical Equipment ST-138/PRC-25
2. Test Equipment/Test Setup.
All tests are to be performed under the following environmental conditions, unless otherwise stated:
230 100C (730 180F).
50 ± 30 percent.
All test equipment is to be energized for at least 30 minutes prior to utilization, unless otherwise specified in operating
manual for the test equipment.
All tests are to be performed in an electromagnetic shielded enclosure, if in a high RF field of interference.
The radio should be preconditioned by turning it on and exercising the band switch kHz and MHz knobs and verifying that
all controls are functioning properly. In the squelch and retransmit position, the radio should not become unsquelched due
to noise (i.e., no signal present). One frequency in the "A" band and one frequency in the "B" band frequency ranges are
sufficient for this test.
No transmitter sidetone will be heard in the retrans mode. A 10 volt input can be used if a regulated power
supply is available, or a battery may be employed.