TM 11-5821-284-34
(6) Power Supply.
rected. Turn on the equipment and allow 5-minute
b. Test Connections
and
Conditions.
warmup before proceeding.
c. Procedure.
Connect equipment as shown in figure 5-5. Do not
connect the AN/USM-44A and power amplifier until di-
Test equipment
Performance
Step
control settings
Figure ref.
Test procedure
standard
1
AN/ARM-115:
Measure dc voltage at
Less than +0 3 Vdc
METER FUNCTION
collector of A1Q13.
OFF.
MV ADJUST. fully ccw.
MANUAL TUNE: OFF.
ME-26B/U: Adjust to
read dc volts, 28 Vdc
maximum.
Power Supply: Adjust
for +27. 5 Vdc.
2
Same as step 1.
Measure dc voltage at
More than +3. 0 Vdc.
A1A4Ai and AlA4B-9.
3
Sane as step 1.
Measure dc voltage at
Less than +03 Vdc.
A1ASA-3 and A1A5B-7.
4
Same as step 1.
Measure dc voltage at
Less than +1. 0 Vdc
(TP-10, TP-11,
A1A3A-3, A1A3B-7
on one output. More than
TP-12)
and AlA3l111.
+3. 0 Vdc on other two
5
Same as step 1.
Fig. 5-8 (TP-13,
Measure dc voltage at
Less than +1. 0 Vdc in same
TP-1-4, TP-1 5)
pins 13, 14, and 15 of
circuit as low voltage
circuit board A1.
measured in step 4. More
than +27. 0 Vdc in same
circuits in which high
voltage was measured In
step 4.
6
Same as step 1.
Fig. 5-8 and
a. Ground one input on a. Output changes to more
5-9 (TP-100
the gate with low
than +3. 0 Vdc.
TP-11 TP-12)
output voltage
(A1A3A3, A1A3B7,
Fig. 5-8 (TP-13,
or AIA3Cil).
TP-9-4, TP-15)
b. Check related output at b. Output changes to more
pins 13, 14, and 15 of
than +3. 0 Vdc.
circuit board Al.
Fig. 5-8 (TP-13,
c. With one input on gate c. Output changes to less
TP-14, TP-15)
in step a still grounded,
than +1. 0 Vdc.
ground output on one
of remaining gates.
Check related output
at pins 13, 14, and 15.
Fig. 5-8 (TP-13,
d. Remove ground applied d. Output changes to less
TP-14, TP-15)
to gate output in step
than + 1. 0 Vdc.
c and ground remaining
gates. Check related
output at pins 13, 14,
and 15.
7
Same as step 1, except
Measure dc voltage at
More than +3. 0 Vdc.
connect AN/USM44A
collector of A1Q1S.
and Power Amplifier
to AN/ARM-115 and
adjust for 0-MHr
output, maximum power.
8
Same as step 7.
Measure de voltage
Less than +0. 3 Vdc.
A1A4A-5.
9
Same as step 7.
Measure dc voltage at
More than +3. 0 Vdc.
A1A4B-9.
5-6
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