ALINEMENT PROCEDURE - TM-11-5820-401-34-30211

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

A5200 SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL. (CONT)

3-27.

ALINEMENT PROCEDURE

Disconnect rf cable from R-442/VRC ANTENNA port.

Lift R-442/VRC A3000 tray (1). (See test setup diagram -- .)

Set ME-30(*)/U to 10-volt scale.

Connect ME-30(*)/U positive lead to TP5008 (2), and negative lead to ground.

Set R-442/VRC MC-TUNE-KC control to any frequency which results in at least a 4-vac reading

on ME-30(*)/U. Record ME-30(*)/U reading.

Reconnect rf cable to R-442/VRC ANTENNA port.

Set AN/URM-103 BAND switch to range that includes R-442/VRC frequency setting.

Set AN/URM-103 RF TUNING control to same frequency selected in step 5.

NOTE

Check the frequency counter to make sure that the signal generator 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

20-v rf level; then disconnect the T-connector from the counter.

Adjust AN/URM-103 DEVIATION control for 3-kHz reading on DEVIATION KHZ meter.

Adjust AN/URM-127 FREQ RANGE DIAL to vary frequency above and below 7.3 kHz while

10.

observing ME-30(*)/U. Stop at frequency that gives highest possible ME-30(*)/U reading. At

same time, adjust AN/URM-103 DEVIATION control to keep ME-30(*)/U reading between

2 and 4 vac. If adjustment of DEVIATION control is required, readjust AN/URM-127 frequency

for peak ME-30(*)/U reading.

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