Holdoff (Trigger)

Trigger behavior is defined by the Holdoff style selected:

The trigger Holdoff can be entered in seconds, milliseconds, microseconds, or nanoseconds. A negative holdoff cannot be entered.

This trigger parameter is shared by measurements that share the same Analyzer Configuration. Changing this parameter for one shared measurement will change it for the other shared measurements.

Trigger parameters (including this one) affect the outcome of the time record capture from hardware when creating a recording as well as when making a measurement.

Non-causal trigger points

For the above-level/positive slope case or the below-level/negative slope case (i.e. where the edge comes before the holdoff has elapsed), the hardware is configured to capture data that comes before the trigger event. This is accomplished by inserting negative trigger delay equal to the holdoff amount to adjust the capture to start before the trigger event actually happens.

Note that, of course, the hardware cannot send a Trigger Out signal at the positive/negative edge before the holdoff has elapsed, so any other instruments that are using External Triggering to trigger based on this Trigger Out signal need to be configured with negative trigger Delay equal to the Holdoff amount.

See Also

Hold-off Style

Trigger Tab

About Trigger

Trigger Styles