General Information; Basic Pulse Control - Avtech AV-1022-C-AS4 Instructions Manual

GENERAL INFORMATION
BASIC PULSE CONTROL
This pulse-delay generated can be triggered by its own internal clock or by an
external TTL trigger signal. In either case, three output channels respond to the trigger:
SYNC OUT, MONITOR, and OUT. The SYNC OUT pulse is a fixed-width pulse that is
generated immediately after triggering. This pulse can be used to trigger oscilloscopes
or other measurement systems. The two other output channels are referenced to the
SYNC OUT pulse. This relationship is illustrated in Figure 4.
50ns
I v
SYNC OUT | 2V, FIXED
uy
DELAY = PW
>)
AMPLITUDE,
OUT VARIABLE
77>
MONITOR (DEFY Pw
N
J we 1V, FIXED
Figure 4 - Basic Output Pulses
The delay, pulse width, and amplitude parameters indicated in Figure 4, as well as the
frequency, can be varied with front panel controls or via the GPIB computer interface.
This pulse generator incorporates a special duty cycle protection circuit, to prevent the
output duty cycle (the pulse width divided by the period) from exceeding 45%. The
instrument will stop triggering if the duty cycle exceeds 45%, and will not start triggering
again until the duty cycle has been reduced. (To reduce the duty cycle, either the
frequency or the pulse width must be decreased.) The "DUTY CYCLE OVERLOAD"
indicator on the front panel will come on if the duty cycle limit has been exceeded.