User manual

Acquisition
Serial Trigger
The Serial trigger type will appear if you have installed serial data trigger and decode options. Select the
Serial type then the desired Protocol to open the serial trigger setup dialogs. For setup instructions, see the
software instruction manual at teledynelecroy.com/support/techlib under Manuals > Software Options.
Qualified Trigger
A Qualified trigger arms on the A event, then triggers on the B event. In Normal trigger mode, it
automatically resets after the B event, and re-arms upon the next matching A event. Unlike a basic Edge or
Pattern trigger with Holdoff, the A and B events can occur in different signals, allowing you to use the state
of one signal to "qualify" the trigger on another.
On the Trigger dialog, select Qualified trigger type to display the controls.
Besides an Edge level, the arming event (A) may be a State, any voltage measured above or below a
threshold Level.
When B is an Edge or Pattern, a time window may be added to the trigger conditions by using the When B
Occurs buttons:
l Any Time triggers if B occurs any time after being qualified by A.
l Less Than triggers only if B occurs before the time set once qualified.
l Greater Than triggers only if B occurs after the time set once qualified.
As with regular Holdoff, the counter may begin from the Acquisition Start or the Last Trigger Time.
Once you've selected the A and B events on the Qualified dialog, set up the conditions on the respective
"Event" dialogs exactly as you would a single-stage trigger.
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