Input Trigger Requirements - Keithley 2520 User Manual

8-6 Triggering

Input trigger requirements

An input trigger is used to satisfy event detection for a trigger model layer that is config-
ured for the TRIGGER LINK event. See
page
shown in
Figure 8-3
Trigger link input pulse specifications
TTL High
Output trigger specifications
The Model 2520 can be programmed to output a trigger after various trigger model
actions. See
a TTL-compatible output pulse that can be used to trigger other instruments. The specifi-
cations for this trigger pulse are shown in
and sink up to 50mA.
Figure 8-4
Trigger link output pulse specifications
TTL High
(3.4V Typical)
TTL Low
(0.25V Typical)
8-2. The input requires a falling-edge, TTL compatible pulse with the specifications
Figure 8-3.
Leading Edge
(2V–5V)
TTL Low
(0.8V)
10µs
"Trigger model (front panel operation)," page
End of
Measurement
or Sweep
5µs
"Trigger model (front panel operation),"
Triggers on
Figure 8-4. A trigger link line can source 1mA
Model 2520 User's Manual
8-2. The output trigger provides