Sectionalization Test Using AN/UPM-137A-cont.

Control settings

Paragraph

Normal Indication

reference

Procedure

Equipment under test

Test equipment

Step

a None.

a. Connect the equipment as shown in B, figure

3-6f.

Same as step 1. . . . . . . . .

Same as step 5 . . . . . . . . .

Adjust

AM-3174/USM

3-4.

the

oscilloscope plug in for X10 GAIN AC,

0.005 volts CM, operation.

b. P l , P2, and P3 pulse

b. Measure the pulse widths of the P1, P2, and

P3 pulses.

widths: 0.8 sec 0.1.

c. Normal indication are.

c. Adjust the oscilloscope as follows:

(1) None.

(1) Adjust the HORIZONTAL control

until the 50-percent point of the first

pulse leading edge is positioned at the

center graticule line.

(2) A d j u s t

the DELAY TIME

(2) Delay between Pl

MULTIPLIER control to measure

and P2 should be 2

the delay between the 50-percent

sec 0.15.

points of pulses P1 and P2. Multiply

dial reading by 2 and note.

(3) Delay between Pl

(3) A d j u s t

DELAY

the

and P3 shown be 3

MULTIPLIER control to measure

sec 0.2.

t h e delay between P1 and P3

at the 50-percent of the

leading edges, multiply dial reading

by 2 and note.

d. Set oscilloscope TIME BASE B TIME/CM

d. None.

to 5.

e. P1-P3 pulse spacing

e. Set the test set MODE switch at each of the

following positions and repeat c 3) above to

measure delays, except to multiply dial

reading by 5.

(1) 5 sec 0.2.

(1) 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(2) 8 sec 0.2.

(2) 3/A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(3) 21 sec 0.2.

(3) C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(4) 6.5 sec 0.2.

(4) TEST . . . . . . . . . . . . . . . . . . . . . . . . . .

a. None.

a. Connect equipment as shown in figure 3-5.1

MODE: 2

AN/UPM-137A

CODE (A, B, C, D):

and turn on AN/UPM-137A and test set.

(rf signal generator

7777

Permit a few minutes to warmup.

OUTPUT ATTEN 0-100

b. None.

b. Press test set PUSH TO TEST switch

dBm: 5

and turn to LOCK position.

TRANSMITTER

c. None.

c. If necessary adjust AN/UPM-137A SIS gen

XMTR FREQ XTAL

TRIGGERSDELAY (

erator

TRANSMITTER CW

SEC)MULT 1-11 control until test set