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 SB 740-91-01
Step
Setting and Instructions
Normal Indication
2
(11) Adjust AN/URM-103 as follows:
(cont.)
(a) Band Switch. D
(b) RF Tuning. 64.05 MHz
(12) Adjust RT-246( )/VRC or RT-524( )/VRC
(a) MC-TUNE-KC. 64.05 MHz
(b) Band. B
(c) Slowly advance AN/URM-103 LO RF lV
Attenuator microvolts
control unit Call indicator lights.
control setting should
Note setting of control.
be 0.7 lV or less.
(d) Slowly reduce input to 0.55 pV.
(Call lamp remains
Squelch shall remain unbroken
lighted.)
(b) Tone (New) operated squelch.
(1) Connect the test equipment in accord-
ance with figure B-4.
(2) On AN/USM-207, set the controls as
follows:
(a) Display Control . Set for desired
time
(b) Sensitivity. 100 V
(c) Gate Time. (sec- ):106
(d) Function. Freq
(3) On AN/URM-103, set controls as follows:
(a) Band Switch. C
(b) RF Tuning. 41.05 MHz
(c) Deviation Range. 10 kHz
(d) Function. 150 Hz
(e) Deviation Adjust. For 3 kHz on
Deviation Meter
(f) LO RF Set to Line. Right-hand meter
to red line
(g) RF Output. LO
(4) On RT-246( )/VRC or RT-524( )/VRC:
(a) Band. A
(b) Light. On
(c) MC-TUNE-KC. 41.05 MHz
(d) Squelch. Old on
(e) Volume. Fully counterclockwise
(f) Power. Low
(g) Speaker. Off (RT-5241)/VRC only).
(5) Press RESET switch on AN/USM-207.
(6) Adjust AN/URM-103 RF tuning control for
41.00 MHz indication on the AN/USM-207.
(7) Adjust AN/URM-103 LO RF lV control for
minimum output.
B-37
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