Sectionalization Tests Using AN/UPM-137A

Control settings

Equipment under test

Test equipment

Normal indication

Step

Procedure

PUSH TO TEST: Continually press and a. set AN/APM-270(V) CONSECU- a. ACCEPT indicator glows.

TIVE REPLIES switch at 56 and

release to observe specified conditions.

note transponder test set indica-

tion.

b. Repeat a above, but set to 55 and then b. REJECT indicator glows.

54. Note whether normal indication

is provided for both settings of

switch.

AN/AMPM-270(V)

a, ACCEPT indicator glows.

CONSECUTIVE REPLIES: 16

a. Note transponder test set indication

a. DIR-RAD: DIR

b. Set AN/UPM-270(V) CONSECU- b. REJECT indicator glows.

b. PUSH TO TEST: Contiu-

TIVE REPLIES switch to 15 and

ually press and release to ob-

then 14. Note whether normal indi-

serve specific conditions.

cation is provided in each position.

c. Reset AN/APM-270(V) CONSECU- c. None.

TIVE REPLIES switch to 16.

d. Set AN/APM-270(V) REPLY MODU- d. REJECT indicator glows.

LATION 1X-2X switch at 2X. Note

transponder test set indication.

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

Control Settings

Step

Test equipment

Normal indicatwn

Equipment under test

Procedure

AN/UPM-137A

a. Apply power to equipment and per-

a. None.

FUNCTION SYSTEM

MODE 4

mit 5 minutes warmup.

(Oscilloscope)

HORIZONTAL-SYNC:

DIR-RAD: RAD

b. +5 0.1 volt.

b. Connect multimeter dc probe to

EXT DC

A3TP1 (fig. 5.1-1). Observe volt-

HORIZONTAL-TIME/DIV:

ISLS: OFF

age indication.

10 sec

DISPLAY-CHAN A/ALT/

CHAN B: CHAN A

VERTICAL-CHAN A-75

IN/OUT: OUT

VERTICAL-CHAN A-AC/DC

VERTICAL-CHAN A-VOLT/

DIV: 1

a. Connect equipment as shown in fig-

AN/APM-270(V)

a. None.

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

ure 5.1-7.1. Apply power to test

CONSECUTIVE REPLIES: 64

REPLY MODULATION-

set,

AN/APM-270(V),

and

SPACING-PULSE 2:0

AN/UPM-137A and permit 15-

REPLY MODULATION-

minute warmup.

b. Press test set PUSH TO TEST switch

b. Test set should indicate AC-

SPACING-PULSE 3:0

SYNC-GAIN: Midposition

and turn to LOCK position.

CEPT.

SYNC-DELAY Midposition