Datapulse 101 - Page 15

the upper trace to lV/cm and the lower trace to SV/cm.
With both the unit under test and the gating signal generator turned
on, several pulses should appear on the lower trace synchronized
with the gate pulse on the upper trace.
Vary the gate signal PULSE WIDTH vernier and note that the pulses
on the lower trace disappear successively as the gate pulse width
(upper trace) is reduced.
Monitor the ADVANCED TRIGGER OUTPUT of the unit under test
on the upper trace of the oscilloscope and synchronize the oscillo-
scope to the REFERENCE TRIGGER OUTPUT of the unit under test.
Set the oscilloscope sweep to Z uS/cm and the amplitude of the
upper trace to ZV/cm.
Set the REPETITION RATE selector to l. 0 MHz with its vernier
fully clockwise, the PULSE WIDTH vernier fully counterclockwise,
and the GATE MODE switch to ASYNC.
Set the gating signal REPETITION RATE to 10 KHz and PULSE
DELAY and PULSE WIDTH to 10 uS with all verniers fully clock-
wise.
Vary the gate signal PULSE WIDTH vernier and note that the
pulses on the lower trace disappear successively as the vernier is
turned counterclockwise. The advance trigger pulses on the upper
trace are not affected.