Specifications

TM 11-5820-670-30
2-5. AUDIO POWER OUTPUT AND DISTORTION TEST. (CONT)
INITIAL EQUIPMENT CONTROL SETTINGS
Set equipment controls as indicated in the following table.
CONTROL AND SWITCH SETTINGS
EQUIPMENT
TS-25751ARC-131
AN/URM-127
TS-723A/U
AN/URM-103
CONTROL OR SWITCH
MODE SWITCH
VOL
SQUELCH
FREQ sel
Freq dial
FREQ RANGE MULTIPLIER
OUTPUT CONTROL
FUNCTION switch
AF-RF switch
Meter RANGE
Freq RANGE
Coarse FREQUENCY
BAND SWITCH and RF TUNING CONTROL
FUNCTION switch
RF OUTPUT switch
LO-HI RF SET to LINE control
and LO RF UV
DEVIATION RANGE KHZ switch
DEVIATION control
POSITION/SETTING
T/R
Maximum (clockwise)
DIS
60.05 MHz
10
X 100
As required in test
procedures.
METER
AF
10
X 10
100
Adjust to 60.05 MHz.
EXT MOD
LO 0-10 KUV
Adjust for 10 microvolt
output.
10
Midrange position
NOTE
With mode switch in T/R position, external power is applied to the receiver-transmitter.
The receiver-transmitter requires a 1-minute warmup before measurements are made.
TEST PROCEDURE
1.
2.
3.
Set FUNCTION switch on signal generator AN/URM-103 to EXT MOD and adjust frequency for a
60.05 MHz, 10 microvolt output.
Adjust AN/URM-127 for 8 kHz deviation as indicated on AN/URM-103 DEVIATION KHZ meter.
Determine that RECEIVER AUDIO OUTPUT J107 HI-LO are connected to METER terminals of
spectrum analyzer TS-723A/U.
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