Read Delay, Error Detector, and Function (Controls) Test

TM 11-6625-667-45/NAVAlR 16-30APM123-2/TO 33A1-3-367-22

DISPLAY control at "B" INTENSIFIED BY

k. Set the test set FUNCTION control to I/P

and the MODE control to position 2.

"A".

e. Set the TIME BASE A TIME/CM control to

l. Adjust the oscilloscope DELAY TIME

0.1 s and TIME BASE B TIME/CM control to

MULTIPLIER control clockwise until the pulses

0.2 s.

are observed. Determine whether the I/P pulses

f. Adjust the DELAY TIME MULTIPLIER

are aligned as in h above.

control until the second pulse of the train on

NOTE

CHANNEL A is intensified.

If necessary, adjust control A7R14 to

g. Set the oscilloscope HORIZONTAL

center the CHANNEL B pulse within

DISPLAY control at "A" DEL'D by "B". The

the CHANNEL A pulse.

Cl pulse of each train should be observed.

7.1-10. Read Delay, Error Detector, and

NOTE

Function (Controls) Test

If necessary, carefully adjust the

DELAY TIME MULTIPLIER control

a. Perform the initial setup procedures given in

to center these pulses on the display.

paragraph 7.1-4.

h. Determine whether the pulse at CHANNEL

b. Connect the oscilloscope CHANNEL A

B is centered with respect to the pulse at

cable to test point A10TP6 (module A10).

c. Measure to make sure that the width of the

CHANNEL A.

pulse at CHANNEL A is 150 7.5 s.

NOTE

d. Disconnect the oscilloscope CHANNEL A

If necessary, adjust control A7R1 in

cable from test point A10TP6, and connect the

module A7 to center the pulse as ac-

cable to test point A11TP3.

curately as possible.

e. Set the oscilloscope HORIZONTAL

i. Determine, as in h above, whether each of the

DISPLAY control to "B" INTENSIFIED BY

pulses in the chart below is centered by adjusting

"A", TIME BASE A TIME/CM control to 0.1

the oscilloscope DELAY TIME MULTIPLIER

s and TIME BASE B TIME/CM control to 0.2

control clockwise to position them. The pulses

should be observed in the order given.

f. Adjust the DELAY TIME MULTIPLIER

NOTE

control until the pulse at the oscilloscope

If necessary, adjust the indicated

CHANNEL A is intensified.

control to center the pulse.

g. Set the HORIZONTAL DISPLAY control

to "A" DEL'D by "B".

Pulse

Control

h. Measure to make sure that the width of the

Al . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R2

pulse at oscilloscope CHANNEL A is 0.35 0.01

C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R3

A2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R4

C4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R5

NOTE

A4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R6

If necessary, adjust control A11R30 to

B1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R7

obtain the required performance

D1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R8

B2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R9

standard.

D2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R10

i. Set the test set and AN/TPM-25A controls

B4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R11

for each mode as indicated in the chart below. The

D4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A7R12

F2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7R13

AN/TPM-123 ACCEPT indicator should light

for each of the modes.

j. Set the AN/TPM-25 REPLIES

MODULATION SEL switch to I P M2/3.

Change 5

7.1-5