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Page Title:
Table 4-8. TRANSMIT CIRCUITS TEST PROCEDURE |
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|  TM 11-5895-1141-34
Table 4-8. TRANSMIT CIRCUITS TEST PROCEDURE
Step
Operation
Normal Indication
1
Use the test set-up of test figure 4-6 to
introduce a measured audio test signal
into the jack panel. Use the second test
set-up figure 4-7 to measure transmitter
audio output from the selector unit.
After implementing both test set-ups, per-
form the preliminary procedures of
steps1a through 1f.
a. Adjust external power source to +24 v.
Power indicator lamp turns on.
Set switch to POWER.
b. Position channel select switch to
Green indicator lamp on selector module turns
LOCK.
on.
c. Turn Loudspeaker/Headset Switch to
OFF (center) position.
d. Turn Lamp Brightness control to maxi-
mum value (clockwise).
e. Set R1202 (input level adjust) and
R1230 (threshold adjust) in microphone
amplifier to maximum value. See
figure 4-3.
f. Insure that the regulator jumper E1221
to E1222 on microphone amplifier is in
place.
4-15
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