AVTECH ELECTROSYSTEMS AVRQ-4-B, Instructions Manual

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GENERAL INFORMATION
BASIC PULSE CONTROL
This instrument can be triggered by its own internal clock or by an external TTL trigger
signal. In either case, two output channels respond to the trigger: HV PULSE and
SYNC. The HV PULSE channel is the signal that is applied to the DUT. The SYNC
pulse is a fixed-width TTL-level reference pulse used to trigger oscilloscopes or other
measurement systems. When the delay is set to a positive value the SYNC pulse
precedes the HV PULSE pulse. When the delay is set to a negative value the SYNC
pulse follows the HV PULSE pulse.
These pulses are illustrated below, assuming internal triggering, a positive delay, and
positive amplitude:
If the delay is negative, the order of the SYNC and OUT pulses is reversed:
30
SYNC OUT
(generated by the
internal oscillator)
100 ns, FIXED
HV PULSE
3V, FIXED
PULSE
WIDTH
(1-20us)
DELAY > 0
(VARIABLE)
AMPLITUDE,
-1.5 or +1.5 kV
TYPICALLY
RISE TIME,
VARIABLE
FALL TIME
(NOT
VARIABLE)
SYNC OUT
(generated by the
internal oscillator)
100 ns, FIXED
HV PULSE
3V, FIXED
PULSE
WIDTH
(1-20us)
DELAY < 0
(VARIABLE)
RISE TIME,
VARIABLE
FALL TIME
(NOT
VARIABLE)
AMPLITUDE,
-1.5 or +1.5 kV
TYPICALLY