Specifications

TM 11-5820-670-30
2-30. AUDIO LEVEL ADJUSTMENT. (CONT)
CONTROL AND SWITCH SETTINGS
EQUIPMENT
CONTROL OR SWITCH
TS-2575/ARC-131
AN/URM-127
AN/URM-103
ADJUSTMENT PROCEDURE
1.
2.
3.
4.
5.
6.
7.
Mode Switch
VOL
SQUELCH
FREQ sel
amplitude control
output frequency
Function selector
output
POSITION/SETTING
T/R
fully clockwise
DIS
60.05
0
1000 Hz
EXT MOD
10 microvolt
Adjust AN/URM-127 for 8 kHz deviation as indicated on AN/URM-103 modulation meter.
Set TS-723A/U function switch to METER.
Tune AN/URM-103 frequency to 60.05 MHz as indicated on TS-723 A/U meter.
On the A4000 assembly, using screwdriver, remove screw on module A4300 cover and remove
cover.
EL1AT238
Monitor voltage at TP5512 on audiofrequency amplifier assembly using multimeter ME-26B/U,
while adjusting R4304 on A4300 module to provide a 0.775 volt indication.
Install cover on module A4300.
On A5500 assembly, adjust potentiometer R5405 on module A5400 for a reading of 2.8 volts
on TS-723A/U meter connected at Hl-LO jack J107 on TS-2575/ARC-131.
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