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TM 11-5820-401-34-3/0967-LP-432-3060
A5300 SQUELCH FILTER ALINEMENT. (CONT)
5-23.
ALINEMENT
PROCEDURE
1.
Disconnect rf cable from R-442/VRC ANTENNA port.
2.
Lift R-442/VRC A3000 tray (1). (See test setup diagram
.)
3.
Set ME-30(*)/U to 10-volt scale.
4.
Connect ME-30(*)/U positive lead to TP5008 (2), and negative lead to ground.
5.
Set R-442/VRC MC-TUNE-KC control to any frequency that results in at least a 4-vac
reading on the ME-30(*)/U.
6 . Set R-442/VRC SQUELCH switch to NEW ON.
7. Adjust R5301(3) for approximately l-vat reading on ME-30(*)/U.
NOTE
The voltage in step 7 will fluctuate. This is normal.
8. Reconnect rf cable to R-442/VRC ANTENNA port.
9. Set AN/URM-103 BAND SWITCH to range that includes R-442/VRC frequency setting.
10.Adjust AN/URM-103 RF TUNING control to same frequency selected in step 5.
NOTE
Check the frequency counter to make sure that the AN/URM-103 is outputting the
correct frequency. The rf level must be increased temporarily to enable the frequency
counter to display. Adjust the AN/URM-103 RF TUNING control as necessary, reset to
1000-v rf level; then disconnect the T-connector from the counter.
5-114


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