TB 9-4931-504-50
20. Delta t Center
a. Performance Check
(1) Connect pulse generator (A4) to CH1 and CH2 inputs, using cable supplied
with pulse generator and adapters (B1 and B2).
(2) Position controls as listed in (a) through (c) below:
(a) CH1 and CH2 pushbuttons pressed.
(b) DELAYED SWEEP SEC/DIV switch to 1 ns.
(c) TRIGGERING LEVEL control for stable display.
(3) Superimpose two displays on oscilloscope (A3), using CH1 and CH2 DC
OFFSET controls.
(4) Adjust CH1 TIME DIFF CH2 control (front panel) fully cw and then fully ccw.
If one display does not lead the other by 1 ns (nanosecond) or more, perform b below.
(5) Press ADD and CH2 INVERT pushbuttons and adjust CH1 TIME DIFF CH2
control for minimum amplitude.
(front panel) control until either adjustment has equal control over leading edge or
lagging edges of display.
21. Balance and Loop Gain
a. Performance Check
(1) Connect pulse generator (A4) to CH1 and CH2 INPUTS, using cable supplied
with pulse generator and adapters (B1 and B2).
(2) Release ADD, CH2, and CH2 INVERT pushbuttons.
