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Page Title:
Sectionalization Tests Using AN/UPM-137A. |
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 Control settings
Test equipment
Euipment under test
Procedure
Normal indication
b. None.
b. Adjust AN/APM-270(V) REPLY
MODULATION-SPACING-PULSE
2 control ccw until test set just indi-
cates REJECT.
c. None.
VERTICAL-CHAN A-VIDEO IN
jack to AN/UPM-137A rf genera-
tor VIDEO OUT jack.
d. Adjust AN/APM-270V REPLY
d. REJECT indicator lights.
MODULATION-SPACING-PULSE
2 control ccw until delay between
leading edges of first and second
pulses displayed on
AN/UPM-137A
oscilloscope
CHAN A is l.45 sec.
e. ACCEPTindicator lights.
e. Adjust AN/APM-270V REPLY
MODULATION SPACING PULSE
2 control cw until delay between
leading edges of first and second
pulses displayed on AN/
UPM-137A oscilloscope CHAN A
is 1.65 sec.
f. Adjust AN/APM-270V REPLY MOD-
f. ACCEPT indicator lights
ULATION-SPACING-PULSE 2
control cw until delay between lead-
ing edges of first second pulses
displayed on AN/UPM-137A oscil-
loscopeCHANA is 1.95 sec.
g. Adjust AN/APM-270V REPLY
g. REJECT indicator lights.
MODULATION-SPACING-PULSE
2 control cw until delay between
leading edges of first and second
pulses displayed on AN/
UPM-137A oscilloscope CHAN A
is 2.15 sec.
h. None
h. Set AN/APM-270(V) REPLY MODU-
LATION-SPACING-PULSE 2 con-
trol to 0.
i. REJECT indicator lights.
i. Adjust AN/APM-270V REPLY MOD-
ULATION-SPACING-PULSE 3
control ccw until delay between
leading edges of first and third
pulses displayed on AN/
UPM-137A oscilloscope CHAN A
is 3.25 sec.
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