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

Control settings

Normal

Paragraph

Equipment

indication

reference

Procedure

under test

Test equipment

Step

VERTICAL-CHAN A-VOLT/

DIV: 5

VERTICAL-CHAN B-AC/DC:

VERTICAL-CHAN-B-75W/

OUT: OUT

VERTIAL-CHAN B-VOLT/

DIV: 5

CALIBRATORS-XTAL MARK

(SEC): OFF

CALIBRATORS-LEVEL:

Midposition

Same as step7 . . . . . . . . . . . . . . . . . . Same as step 7. . . . . . . . . . a. Connect AN/UPM-137A oscilloscope VERTI- a. Refer to figure 8-36.

CAL-CHAN A-VIDEO IN jack to following

test points in order given. Observe whether

pulses are normal.

(1) 3-6j

(1) A10TP5 (video-enable delay).

(2) 3-6i

(2) A9TP4 (video-enable output).

(3) 3-6k

(3) A1lTP1 (video-shaper output).

(4)3-6i

(4) A9TP3 (line-drive enable output).

(5) 3-6j

(5) A10TP4 (line-drive pulse).

(6) 3-6j

(6) A10TP2 (delay-line pulses).

(7) 3-6j

(7) A10TP1 (delay-line main gate input).

(8) 3-6k

(8) A11TP2 (comparison pulse-shaper output).

(9) A10TP6 (read relay).

(9) 3-6j

(10) 3-6i

(10) A12TP4 (error blanking).

b. Connect AN/UPM-137A oscilloscope VERTI- b. Indications are-

CAL-CHAN A-VIDEO IN jack to following

teat points in order given. Verify that cor-

a. None.

rect dc levels are present.

(1) 7 to 12 volts dc.

(1) A11TP6 (error detector output).

b. None.

(2) 7 to 12 volts dc.

(2) A12TP3(readout) . . . . . . . . . . . . . . . . . . .

When REJECT

indicator is

lighted.

c. Repeat a(2) through (10) above with test set c. Indications should be the

same as in a above.

MODE switch at C, 3/A, TEST, and 1 re

spectively.

d. Set test set CODE switches to 7700 and d. None.

MODE switch to 2. Set AN/UPM-137A SIS

generator SIF 1 CODER-Code switches to

7700.

3-6i

e. Set AN/UPM-137A SIS generator SIF 1 COD- e. Waveform in figure 8-36

(A9TP4).

ER-FUNCTIONAL SEL switch to I/P and