TEST PROCEDURE - TM-11-5820-670-300105

TM 11-5820-670-30

2-7. RECEIVER SENSITIVITY, QUIETING, AND LIMITING TEST. (CONT)

POSlTION/SETTING

CONTROL OR SWITCH

EQUIPMENT

Adjust as required in test

BAND SWITCH and RF TUNING CONTROL

AN/URM-103

procedures.

EXT MOD

FUNCTION switch

LO 0-10 KUV

RF OUTPUT switch

LO-HI RF SET to LINE control and LO

Adjust for 10 microvolt.

RF UV

DEVIATION RANGE KHZ switch

Midrange position

DEVIATION control

SET LEVEL

FUNCTION switch

TS-723 A/U

+20 db

Meter RANGE

AF-RF switch

X 10

RANGE

Freq dial

AN/URM-127

X 100

FREQ RANGE MULTIPLIER

Adjust as required to produce

OUTPUT CONTROL

8 kHz deviation on

AN/URM-103.

TEST PROCEDURE

1. 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.

2. Adjust the signal INPUT control on TS-723A/U for a 0 db reference indicated on meter.

3. 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.

4. 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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