Sectionalization Tests Using AN/UPM-137A-CONT.

Control settings

Normul indication

Procedure

Euipment under test

Test equipment

Step

c. Increase AN/UPM-137A rf signal c. None.

gemerator OUTPUT ATTEN 0-100

dBm control to -6 dBm.

a. None.

a. Disconnect cable at AN/UPM-137A

PUSH TO TEST: LOCK

Same as step 2 . . . . . . . . . . . . . . . . . . . .

rf signal generator SIG GEN

IN/OUT 0.5-50W jack and connect

to AN/APM-270(V) RF IN jack.

b. None.

b. Connect AN/UPM-137A oscilloscope

VERTICAL CHAIN A-VIDEO IN

jack to DET VIDEO jack of

AN/APM-270(V).

c. None.

c. Adjust AN/UPM-137A oscilloscope

controls for clear display on CHAN

d. 36 pulses present: 1 pulses, a

d. Adjust AN/UPM-137A oscilloscope

vacant position. andld 32 pul-

controls as necessary until one com-

ses.

plete group of challenge video pul-

ses is observed. Count number of

pulses.

e. 10% maximum difference in

e. Measure amplitude of first and last

amplitude between two

pulse and determine percentage of

pulses.

difference.

NOTE

Adjust AN/UPM-137A oscillo-

scope controls.

f. 2 0 . 0 7 s e c .

f. Measure Spacing between leading

edges first and second pulses.

g. 0.5 0.2 sec.

g. Measure pulse width of first pulse at

50% point of amplitude.

h. Fifth pulse position occupied.

h. Set test ISLS switch to ON. Note

whether a pulse, having similar am-

plitude as other, occupies, fifth

pulse position.

i. Measure pulse spacing with respect to

i. 8 0.15 sec.

first pulse.

j. Measure ISIS pulse width at 50% j. 0.5 0.1 sec.

point.

h. Pulse amplitude decreases to

k. Set Teat ISLS switch to OFF. Note

whether amplitude of fifth pulse

low amplitude.

decreases.

Same as step 2 . . . . . . . . . . . . . . . . . . . PUSH TO TEST

a. Disconnect cable at RF IN jack of a. None,

AN/APM-270(V) and connect to

Continually press and release to ob-

AN/UPM-137A rf signal generator

serve specific conditions.

RF SIG GEN IN/OUT 0.05-50W

jack.