Advanced triggering
Advanced triggering
Y
ou can check the advanced trigger status in the trigger menu. The menu indicates the trigger type and then shows sources, levels, or any
other parameters that are important for the particular trigger type. Use the following links for more information on advanced triggering.
• Triggering concepts on page 87
• Set Trigger Holdoff on page 88
• Trigger on sequential events (A and B triggers) on page 89
• Set up trigger on a parallel bus on page 89
• Set up trigger on a serial bus on page 90
Triggering concepts
Overview
User selected trigger conditions are used to capture waveforms for measurement and analysis.
Triggers help you capture meaningful waveforms to display on screen. This instrument has simple edge triggers as well as a variety of
advanced triggers.
The trigger event
The trigger event establishes the time-zero point in the waveform record. All waveform record data are located in time with respect to that
point. The instrument continuously acquires and retains enough sample points to fill the pretrigger portion of the waveform record (that part
of the waveform that is displayed before, or to the left of, the triggering event on screen).
When a trigger event occurs, the instrument starts acquiring samples to build the posttrigger portion of the waveform record (displayed
after, or to the right of, the trigger event). Once a trigger is recognized, the instrument will not accept another trigger until the acquisition is
complete and the holdoff time has expired.
Trigger on a pulse width event
Pulse-width triggering triggers the instrument when a signal pulse width is less than, greater than, equal to, or not equal to a specified
pulse width. This trigger is useful for digital logic troubleshooting.
About this task
To set a pulse width trigger:
Procedure
1. Double-tap the Trigger badge to open the Trigger configuration menu.
2. Tap Trigger Type and select Pulse Width.
3. Tap Source and select the trigger source.
4. Tap Trigger When and select the pulse width condition on which to trigger (> Limit, < Limit, = Limit, ≠Limit, Outside Range,
Inside Range).
Advanced triggering
3 Series Mixed Domain Oscilloscope Printable Help 87
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