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Page Title:
Sectionalization Tests Using AN/UPM-137A-CONT. |
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 Control settings
Normal Indication
Equipment under test
Procedure
Test equipment
Step
5
i. REJECT indicator lights.
i. Adjust AN/APM-270V REPLY
(Cont)
MODULATIONSPACING
PULSE 3 control ccw until delay
between leading edges of first
and third pulses displayed on
A N / U P M - 1 3 7 A oscilloscope
CHAN A is 3.25 sec.
j. ACCEPT indicator lights.
j. Adjust AN/APM-270V REPLY
MODULATIONSSPACING
PULSE 3 control cw until delay
between leading edges of first
and third pulses displayed on
AN/U PM- 137A oscilloscope
CHAN A is 3.45 sec.
h. ACCEPT indicator lights.
k. Adjust AN/APM-270V REPLY
MODULATIONSPACING
PULSE 3 control cw until delay
between leading edges of first
and third pulses displayed on
AN/UPM-137A
oscilloscope
CHAN A is 3.75 sec.
l. REJECT indicator lights.
l. Adjust AN/APM-270V REPLY
MODULATIONSPACING
PULSE 3 control cw until delay
between leading edges of first
and third pulse displayed on
A N / U P M - 1 3 7 A oscilloscope
CHAN A is 3.95 sec. At end of
test, s e t R E P L Y M O D -
ULATION-SPACINGPUL-
SE 3 control to zero.
a. ACCEPT indicator lights.
AN/APM-270(V)
CON-
a. S e t
PUSH TO TEST:
6
Continually press and release to
SECUTIVE REPLIES switch at
56 and note transponder test set
observe specified conditions.
indication.
b. REJECT indicator lights.
b. Repeat a above, but set switch
to 55 and then to 54. Note
whether normal indication if
provided for both settings of
switch.
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