TEST PROCEDURE-continued - TM-11-5820-401-34-30397

TM 11-5820-401-34-3/0967-LP-432-3060

RECEIVER SELECTIVITY TEST. (CONT)

5-10.

31. Turn AN/URM-103 LO RF UV control clockwise until display appears on AN/USM-207.

Note frequency displayed.

32. Adjust AN/URM-103 RF TUNING control for 29.59-MHz display on AN/USM-207.

33. Disconnect T-connector from AN/USM-207.

34. Reset AN/URM-103 LO RF UV control to level arrived at in step 23.

STANDARD. R-442/VRC CALL lamp should be off.

35.

If R-442/VRC CALL lamp is lit, see troubleshooting chart 5-6.

36.

Turn AN/URM-103 RF TUNING control slowly clockwise until R-442/VRC CALL lamp lights.

37.

Reattach T-connector to AN/USM-207.

38.

Turn AN/URM-103 LO RF UV control clockwise until display appears on AN/USM-207. Note

frequency displayed.

39. Subtract frequency noted in step 38 from frequency noted in step 31.

STANDARD. The difference between the two frequencies should be 80 kHz or less.

40. If difference between frequencies noted in steps 31 and 38 is more than 80 kHz, see

troubleshooting chart 5-6.

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