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TM
11-5820-401-34-3/0967-LP-432-3060
3-5. OLD SQUELCH TEST. (CONT)
STANDARD. R-442/VRC CALL lamp should go out.
6. If CALL lamp stays lit, see troubleshooting chart 3-3.
7. Reconnect cable to R-442/VRC ANTENNA port.
STANDARD R-442/VRC CALL lamp should light.
8. If CALL lamp does not light, see troubleshooting chart 3-3.
OLD SQUELCH Test at 41.00 MHz
9. Change R-442/VRC MC-TUNE-KC switch to 41.00 MHz and BAND to
10. Turn AN/URM-103 BAND SWITCH to and RF TUNING control for 41.00-MHz meter
indication.
11. Adjust AN/URM-103 RF TUNING control for 41.00-MHz display on AN/USM-207. To produce
display, see note under step 1 and readjust RF TUNING control until AN/USM-207 indicates
41.00 MHz.
12. Repeat steps 2 through 8.
OLD SQUELCH Test at 52.00 MHz
13. Change R-442/VRC MC-TUNE-KC switch to 52.00 MHz.
14. Turn AN/URM-103 RF TUNING control for 52.00-MHz meter indication.
15. Adjust AN/URM-103 RF TUNING control for 52.00-MHz display on AN/USM-207. To produce
display, see note under step 1 and readjust RF TUNING control until AN/USM-207 indicates
52.00 MHz.
16. Repeat steps 2 through 8.
OLD SQUELCH Test at 53.00 MHz
17. Change R-442/VRC MC-TUNE-KC switch to 53.00 MHz and BAND to
18. Turn AN/URM-103 RF TUNING control for 53.00-MHz meter indication.
19. Adjust AN/URM-103 RF TUNING control for 53.00-MHz display on AN/USM-207. To produce
display, see note under step 1 and readjust RF TUNING control until AN/USM-207 indicates
53.00 MHz.
20. Repeat steps 2 through 8.
OLD SQUELCH Test at 65.00 MHz
21. Change R-442/VRC MC-TUNE-KC switch to 65.00 MHz.
22. Turn AN/URM-103 BAND SWITCH to
and RF TUNING control for 65.00-MHz meter
indication.
23. Adjust AN/URM-103 RF TUNING control for 65.00-MHz display on AN/USM-207. To produce
display, see note under step 1 and readjust RF TUNING control until AN/USM-207 indicates
65.00 MHz.
24. Repeat steps 2 through 8.
OLD SQUELCH Test at 75.00 MHz
25. Change R-4421VRC MC-TUNE-KC switch to 75.00 MHz.
26. Turn AN/URM-103 RF TUNING control for 75.00-MHz meter indication.
3-15


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