PULSE SYNC TEST

PULSE SYNC TEST

3-21.

a. Test Equipment.

Oscilloscope AN/USM-281A.

Test Connections and Conditions.

(1) Connect RF Cable W5 from RF OUT jack on RF Modulation Assembly 1A3

to RF IN jack on status panel.

(2) Install a BNC tee connector at SYNC PULSE jack of RF Modulation

Assembly 1A3. Connect one side of BNC tee to oscilloscope EXT input.

de of BNC tee to oscilloscope B input.

(3) Set switch to DET VIDEO on status panel. Connect CHAN 1 to

oscilloscope A Input.

c. Initial Test Equipment Setting.

(1) On oscilloscope time base and delay generator, set POS/NEG push-

button switch to NEG.

(2) Set oscilloscope for CHOP MODE and TIME/DIV for 0.5 S.