Transmitter Output Pulse Test - TM-11-6625-667-450226

Control settings

Step I

Test equipment

Equipment under test

Performance Standard

Test Procedure

f. Set the RANGE switch to 10

f. Meter deflects slightly to

(Cont)

right (approximately 21

DBM and readjust zero set

dbm).

coarse and fine controls to zero

meter.

Reconnect

the

MX-2144A/U to

the

AN/APM-123 PROBE con

nector. Observe the power meter

reading.

g. Remove the jumper from A4TP4

to ground.

5.2-5. Transmitter Output Pulse Test

a. Test Equipment Required.

(1) Oscilloscope, AN/USM-28A.

(2) Radar Test Set, AN/TPM-25A.

(3) Generator, Pulse AN/UPM-15A.

b. Test connections and conditions. Perform the system timing setup as described in the chart in

paragraph 5.2-4 c step (l). Then connect the equipment as shown in figure 5.2-3, transmitter pulse

characteristics test setup.

c. Procedure

Control settings

Test Procedure

Step I Test equipment

Performance Standard

Equipment under test

---- --

--.

AN/TPM-25A

a. None.

a. Turn on the oscilloscope and

POWER ON

FUNCTION: SYSTEM

MEASUREMENT FUNCTION

test set. Permit a few minutes

ISLS: ON.

SEL PWR

warmup.

POWER: ON.

b. A d j u s t t h e o s c i l l o s c o p e

b. (See(1) through (3) below.

REPLIES MODULATION SEL

PRESS TO TEST: LOCK

MAIN TRIGGER LEVEL,

SIF

INTENSITY, and FOCUS for a

REPLIES SUB PULSE SEL:

MODE: 1.

clear view of the pulses and the. 1

OFF

s markers displayed on

PRT SEL ( SEC) 4000

oscilloscope.

TRIG SEL INT DCD/EXT INT

(1) Pulse widths 0.8 0.1

(1) Measure pulse widths at 50%

SIG GEN FUNCTION: FIXED

points.

FREQ