General Information; Basic Pulse Control - Avtech AV-1011-C-OP1B Instructions Manual

11
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: OUT and SYNC. The
OUT channel is the signal that is applied to the load. Its amplitude and pulse width are
variable. 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 OUT pulse. When the delay is set to a negative value the
SYNC pulse follows the OUT pulse.
These pulses are illustrated below, assuming internal triggering and a positive delay:
50ns
SYNC OUT =)
L
(generated by
internal clock)
|
"
3V, FIXED
DELAY PW
<
aS
> v
AMPLITUDE,
OUT
|
0 to +100V
Figure A
If the delay is negative, the order of the SYNC and OUT pulses is reversed:
50ns
AMPLITUDE,
OUT 0 to +100V
Figure B