Specifications

2-7. RECEIVER SENSITIVITY, QUIETING, AND LIMITING TEST. (CONT)
TM 11-5820-670-30
EQUIPMENT
AN/URM-103
TS-723 A/U
AN/URM-127
CONTROL OR SWITCH
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
FUNCTION switch
Meter RANGE
AF-RF switch
RANGE
Freq dial
FREQ RANGE MULTIPLIER
OUTPUT CONTROL
POSlTION/SETTING
Adjust as required in test
procedures.
EXT MOD
LO 0-10 KUV
Adjust for 10 microvolt.
10
Midrange position
SET LEVEL
+20 db
AF
X 10
10
X 100
Adjust as required to produce
8 kHz deviation on
AN/URM-103.
TEST
1.
2.
3.
4.
PROCEDURE
Adjust AN/URM-103 signal generator output to 30.00 MHz (indicated by maximum audio on
TS-723A/U meter) 0.5 microvolt, 8 kHz deviation.
Adjust the signal INPUT control on TS-723A/U for a 0 db reference indicated on meter.
Set TS-723A/U function switch to DISTORTION position and adjust coarse and fine FREQUENCY
controls along with BALANCE control for a minimum meter indication.
Observe TS-723A/U meter indication in db. Compare the indication in db below the reference
set in step 2.
STANDARD. 10 db minimum
5. If meter indication is not at Ieast 10 db below the reference, see troubleshooting chart 2-9.
6. Repeat steps 1 through 5, adjusting TS-2575/ARC-131 test set for each of the following
frequencies: 41.00 MHz, 52.00 MHz, 53.00 MHz, 65.00 MHz, and 75.95 MHz.
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