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|  TM 11-5820-509-35
OUTPUT meter. Use the OPR-TUNE switch to
(2) Place the turns-counters of POWER
control power amplifier plate power. Do not permit
AMPLIFIER TUNE and POWER AMPLIFIER LOAD
the power amplifier to operate for more than a few
controls to the settings recommended on the LOAD-
seconds in the unloaded or off-resonant condition,
TUNE chart on the front of the receiver-transmitter.
serious equipment damage can result. Between
CAUTION
each procedural step of the following chart,
Before
making
the
following
resonate the power amplifier output circuit at the
measurements, resonate the POWER
new operating frequency.
AMPLIFIER TUNE and POWER
AMPLIFIER LOAD controls for
maximum deflection on the XMTR
Test
Radio
equipment
control
Test
Performance
Step
settings
settings
procedures
standards
1
Adjust audio oscillator to
Place CW-FSK/VOICE
Measure transmitter output
Output frequency is 9902
2000 Hz; set output level
switch to CW-FSK.
frequency with counter.
kHz - 10 Hz.
to 0.1 volt rms.
2
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 9913
KILOCYCLES
indicator
kHz - 10 Hz.
to 9911.
3
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency Is 9924
KILOCYCLES
indicator
kHz - 10 Hz.
to 9922.
4
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 9935
KILOCYCLES
indicator
kHz - 10 Hz.
to 9933.
5
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 9946
KILOCYCLES
indicator
kHz - 10 Hz.
to 9944.
6
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 9957
KILOCYCLES
indicator
kHz - 10 Hz.
to 9955.
7
Same as step 1.
Same as step 1, except set
Same as step I.
Output frequency is 9968
KILOCYCLES
indicator
kHz - 10 Hz.
to 9966.
8
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 9979
KILOCYCLES
indicator
kHz - 10 Hz.
to 9977.
9
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 9990
KILOCYCLES
indicator
kHz - 10 Hz.
to 9988.
10
Same as step 1.
Same as step 1, except set
Same as step 1.
Output frequency is 10001
KILOCYCLES
indicator
kHz 10 Hz.
to 9999.
4-17. Transmitter Power Input Test
(5) Primary power source: 26.5-volt, dc, 11
amperes approx.
a. Test Equipment and Material.
b. Test Conditions and Equipment Connections.
(1) Antenna simulator (p/o Cable Assembly
(1) the test equipment to Radio Receiver-
Set AN/PRA-4)
Transmitter RT-671/PRC-47 as shown in figure 4-6.
(2) Dummy Load DA-75/U
(2) Connect the primary power source to the
receiver-transmitter.
(3) Handset H-33G/PT
(3) Place the POWER-LIGHTS switch on RT-
(4) Dc ammeter, 0 to 15 amperes, Simpson
671 /PRC-47 to POWER ON. Permit the equipment to
375 or equal.
stabilize for at least 5 minutes before beginning the
procedures shown in the chart below.
4-15
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