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|  FINAL TESTING
Section I. INTRODUCTION
audio test box listed in paragraph 128 the
following items are required for final test-
The tests outlined in this section are
ing:
designed to measure the performance ca-
pability of a repaired Radio Set AN/VRC-
24 or AN/TRC-68. Equipment that meets
the requirements stated in the tests will
provide satisfactory operation equivalent
to that of new equipment.
Testing
In addition to the test equipment and
Section II. TESTS
b. Test Procedure, Radio Set AN/TRC-
68.
Voltage
(1) Adjust the input voltage to 115 (or
Connect Radio Set AN/VRC-24 or AN/
230) volts ac with the AN/TRC-68
TRC-68 and the test equipment as shown in
operating on transmit.
(2) Set the frequency to 399.9 mc.
(3) After a 30-minute warmup, meas-
a. Test Procedure, Radio Set AN/VRC-
ure and record the transmitter out-
24.
put frequency.
(1) Adjust the input voltage to 26.4
(4) Adjust the input voltage to 103 (or
volts dc with the AN/VRC-24 oper-
207) volts ac and, after 5 minutes,
ating on transmit. Use the ME-26/
repeat the frequency measure-
U to measure the dc input voltage.
ment. The frequency must be with-
(2) Set the frequency to 399.9 mc.
in 2 kc of 399.9 kc.
(3) After a 30-minute warmup, meas-
(5) Adjust the input voltage to 127 (or
ure and record the transmitter out-
253) volts ac and, after 5 minutes,
put frequency.
repeat the frequency measure-
(4) Adjust the input voltage to 22 volts
ment. The frequency must be with-
dc and, after 5 minutes, repeat the
in 2 kc of 399.9 kc.
frequency measurement. The fre-
quency must be within 2 kc of
of 399.9 mc.
(5) Adjust the input voltage to 30 volts
Connect the AN/VRC-24 or AN/TRC-68
dc and, after 5 minutes, repeat the
for normal operation. Check LINE V, LOW
frequency measurement. The fre-
B+, HIGH B+, and S-METER on receive.
quency must be within 2 kc of
Operate the push-to-talk switch and check
399.9 mc.
LOW B+, HIGH B+, DVR Ib, PA Ig, PA Ib,
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