TM 11-6625-486-14&P
Control Settings
Test Procedure
Performance Standard
Test Equipment
Equipment under test
POWER: ON.
FUNCTION SW: CHK.
a. Allow oscilloscope to warm
a. None.
AMPLITUDE CALIBRATOR
RANGE SW: Any range.
up for 15 minutes before
use.
VOLTS/CM: 0.5.
b. None.
PLITUDE CALIBRATOR
to calibrate CRT screen for
2V PP; then, turn AM-
PLITUDE CALIBRATOR
to OFF.
c. None.
149(*)/USM-159 to any
crystal checkpoint. Plug in
Headset HS-216/U and
adjust CORRECTOR
control for zero beat (use
loudest beat note) in
headset.
d. Adjust CORRECTOR and
d. Note.
AUDIO GAIN controls to
obtain 1.54 vots peak-to-
l
peak of true zero-beat note
as indicated on oscilloscope
and heard in headset; then,
unplug HS-216/U.
e. Rotate CORRECTOR control
e. Peak-to-peak voltage level of
throughout its range and
any spurious beat notes
observe peak-to-peak
should be not greater than
voltage level of any
0.154 volts peak-to-peak
spurious beat notes other
(down at least 20 db below
than true zero-beat note
true beat level).
level of 1.54 volts.
(3) Multimeter TS-352B/U.
6-40 . Audio Power Outpu t With Internal Crystal
(4) Variable Power Transformer CN-16/U.
Oscillator Test
(5) Headset H-216/U.
.
a. Test Equipment and Materials
b. Test Connections and Conditions. Connect the
(1) Oscilloscope AN/USM-151(*).
equipment as shown in figure 6-22.
(2) 600-ohm dummy load (fabricated in
accordance with instructions given in paragraph 6-10).
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