Mode 4 Challenge Video Tests Using AN/UPM-98

TM 11-6625-667-45/NAVAIR 16-30AMP-123-2/TO 33A1-367-22

(1) Connect the equipment as shown in figure

5.1-17. Mode 4 Challenge Video Tests

5.1-7, except connect the transponder test set

Using AN/UPM-98

PROBE jack cable to AN/APM-270(V) RF IN jack,

a . Test Equipment Required.

and the oscilloscope CHANNEL A cable to the

( 1 ) Modulator MD-798.

AN/APM-270(V) DET VIDEO jack.

(2) Oscilloscope AN/USM-281A.

(2) Apply power to the equipment and permit a

( 3 ) Test Facilities Set, Transponder Test Set

5-minute warmup period.

AN/APM-270(V).

b. Test Connection and Conditions.

Change 4

5.1-26.5