User's Manual

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Chapter 2: Task Guide
Setting Up Triggers and Running Measurements
Editing Advanced Trigger Functions
After you break down a trigger function (if it didn't quite provide the
trigger capability you need), or after you select one of the advanced
trigger functions, you're ready to edit the advanced trigger function.
All trigger functions look for events and, if those events are found, take
actions.
Most often, the event is something that occurs on the probed signals
(label events), and the action is to trigger the logic analyzer. However,
events can also test timer, counter, and/or flag values that are set up in
the logic analyzer, and actions can include setting up timers, counters,
and flags as well as specifying special store actions.
• “To specify a duration or occurrence count for events (timing mode)” on
page 78
• “To insert a store action (state mode)” on page 79
• “To insert timer actions/events” on page 79
• “To insert counter actions/events” on page 80
• “To insert flag actions/events” on page 81
• “To insert a "reset occurrence counter" action” on page 83
• “To group events” on page 83
• “To use named events” on page 84
To specify a duration or occurrence count for events
(timing mode)
When working with advanced trigger functions or when you break
down other trigger functions, you can specify that an event be present
for a certain amount of time, or occur in a certain number of samples,
before the associated action is taken.
To specify a time duration for events
1. In the Trigger tab's Trigger Sequence area, if the present for > button is
not present, select the occurs button and choose present for >.