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|  TM 11-5820-401-34-3/0967-LP-432-3060
3-20. SILICON VERSION IF DISCRIMINATOR A4200A ALINEMENT. (CONT)
TEST SETUP. Connect the equipment as shown in test setup diagram
. Remove R-442/VRC
bottom cover. (See paragraph 2-7.)
INITIAL EQUIPMENT CONTROL SETTINGS. Set equipment controls as indicated in the following table.
If using alternate equipment, inject 20-v rf at 30 MHz, 1-kHz modulation, and 8-kHz deviation.
CONTROL AND SWITCH SETTINGS
CONTROL OR SWITCH
POSITION/SETTING
EQUIPMENT
R-442/VRC
POWER
ON-RESET
BAND
MC-TUNE-KC
30.00
VOLUME
Fully clockwise
SQUELCH
NEW OFF
POWER
AN/USM-207
TRACK
DISPLAY
MIN (fully counterclockwise)
SENSITIVITY
PLUG IN
FUNCTION
FREQ
103 (black knob)
GATE TIME
DIRECT
DIRECT/HETERODYNE
0.3 V MAX (both switches to left)
INPUT
100
FREQUENCY TUNING-MC
AN/URM-103
OPERATE/OFF/STAND BY
OPERATE
1000 Hz
FUNCTION
BAND SWITCH
RF TUNING
30.00
DEVIATION RANGE KHZ
10
RF OUTPUT
LO, 0-10 KUV
DEVIATION
Fully counterclockwise
RF SET TO LINE
Adjust until needle on IF UV RF SET TO LINE
meter is over red line
LO RF UV
20 v
3-105
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