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Page Title:
Audio output and distortion test (CONT) |
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 SB 740-91-01
Step
Setting and Instructions
Normal Indication
3
(e)
On TS-723B/U, set controls as follows:
(cont.)
(1) Range X10
(2) Input. Min
(3) Frequency. Dial Indication of 100.
(4) Function Switch. Meter
(5) Meter Range Switch. 30 Vrms
(f)
On R-442/VRC, set controls as follows:
(1) Light. Off
(2) MC-TUNE-KC. 60.05 MHz
(3) SquelchOld off
(4) Volume. Fully counterclockwise
(g)
Connect free lead of the 600 ohm
resistor to terminal F of Test Cable
No. 1.
(h)
Connect TS-723B/U meter leads C and D
to Test Cable No. 1 terminals F and A,
respectively.
(i)
Press Reset switch on AN/USM-207.
(j)
Adjust AN/URM-103 RF tuning control for
60.05 MHz indication on the AN/USM-207.
(k)
Adjust AN/URM-103 LO RF pV control for
11.6 -V.
(l)
Adjust R-442/VRC volume control fully
clockwise.
(m)
Adjust R-442/VRC volume control for an
indication of 17.3 V (500 mW) on
TS-723B/U meter.
(n)
Disconnect TS-723B/U meter leads C and
D from Test Cable No. 1 Connect AF
input leads B and A to Test Cable No. 1
terminals F and A, respectively.
(o)
On TS-723B/U, accomplish the following:
(1) Turn function switch to Set Level.
(2) Turn meter range switch to 100%.
(3) Adjust signal input control to
produce full-scale (100%) deflec-
tion of meter.
(4) Turn function switch to Distortion.
(5) Adjust frequency and balance con-
trols for minimum indication on
meter.
B-49
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