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  TM 11-5821-284-34
Test equipment
Performance
Step
control settings
Figure ref.
Test procedure
standard
MANUAL TUNE: OFF.
AN/USM-140'
Adjust to
observe wave-
form shown in
figure 6-4U.
Power Supply.
Adjust for
+ 27. 5 Vdc.
5-7.
Servo Gain Test
a. Test Equipment.
(1) Test Set, Antenna AN/ARM-115.
(2) Oscilloscope, AN/USM-281. allow 5-minute warmup before proceeding.
(3) Power Supply.
b. Test Connections and Conditions. Connect the equipment as shown in figure 5-2. Connect positive lead of
100 MV OUTPUT to FL1 and negative lead to FL5. Turn on the equipment and
c. Procedure.
Test equipment
Performance
Step
control settings
Figure ref.
Test procedure
standard
1
AN/ARM-115.
Ground FL4 and observe
Waveform is th e same as
METER FUNCTION
(TP-17)
waveform at JZK.
that shown in figure 6-4Y
+0 to 500 mV.
T2 is 9. 5 ±3. 5 ms.
MV ADJUST: Adjust
for +100 mV.
MANUAL TUNE: OFF.
AN/USM-1140: Adjust
to observe waveforms
shown in figures
6-4Y and 6-4Z.
Power Supply
Adjust for +27. 5
2
Turn AN/ARM-115
Observe waveform at J2K Waveform is same as that
METER FUNCTION
(TP-17)
shown in figure 6-4Z. T2
to -0 to 500 mV and
is 9. 5 f3. 5 ms.
adjust for -100-mV
output.
Figure 5-1. Test connections, phase discriminator output test.
`lead of 100 MV OUTPUT to FL1 and negative lead to
5-8.
Receive/Transmit Logic Test
FL5. Turn on the equipment and allow 5-minute warmup
a. Test Equipment.
before proceeding.
(1) Test Set, Antenna AN/ARM-115.
(2) Power Supply.
b. Test Connections and Conditions. Connect
the equipment as shown in figure 5-3. Connect positive
5-3
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