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Page Title:
Sectionalization Tests Using AN/UPM-137A-CONT. |
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 Contro1 settings
Equipment under test
Procedure
Normal indication
Test equipment
Step
.
j. ACCEPT indicator lights.
j. Adjust AN/APM-270V REPLY MOD-
ULATION-SPACING-PULSE 3
control cw until delay between lead-
ing edges of first and third pulses
displayed on AN/UPM-137A oscil-
loscope CHAN A is 3.45 sec.
k. ACCEPT indicator lights.
k. Adjust AN/APM-270V REPLY
MODULATION-SPACINGPULSE
3 control cw until delay between
leading edges of first and third pul-
ses displayed on AN/UPM-137A
oscilloscope CHAN A is 3.75 sec.
1. REJECT indicator lights.
l. Adjust AN/APM-270V REPLY MOD-
ULATION-SPACING-PULSE 3
control cw until delay between lead-
ing edges of first and third pulse
displayed on AN/UPM-137A oscil-
loscope CHAN A is 3.95 sec. At
end of test, set REPLY MODULA-
TIONS-PACING-PULSE 3 control
to zero.
a. Set AN/APM-270(V) CONSECU-
PUSH TO TEST
a. ACCEPT indicator lights.
6
TIVE REPLIES switch at 56 and
Continually press and release to ob-
note transponder test set indica-
serve specified conditions.
tion.
b. REJECT indicator lights.
b. Repeat a above, but set switch to 55
and then to 54. Note whether nor-
mal indication is provided for both
settings of switch.
a. ACCEPT indicator lights.
a. Note test set indication.
a. DIR-RAD DIR
AN/APM-270(V)
7
b. REJECT indicator lights.
b. Set AN/APM-270(V) CONSECU-
CONSECUTIVE REPLIES: 16
TIVE REPLIES switch to 15 and
b. PUSH TO TESTS:
then 14. Note whether normal indi-
Continually press and release to
cation is provided in each position.
observe specified conditions.
c. None.
c. Reset AN/APM-270(V) CONSECU-
TIVE REPLIES switch to 16.
d. REJECT indicator lights.
d. Set AN/APM-270(V) REPLY MODU-
LATION 1X-2X switch at 2X. Note
transponder test set indication.
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