Trigger Setup
1. Adjust the position (delay) time by rotating
the Horizon tal Position knob.
2. Turn horizon tal SCALE to acquire the
detail that you need around the position
(delay) expansion point.
The part of the record that occurs before the trigger is t h e pretrigger portion. The part that occurs after the trigger is the posttrigger
portion. Pretrigger data can help you troubleshoot. For example, to find t he cause of an unwanted glitch in your test circuit, you can
trigger on the glitch and make the pretrigger period large enough to capture data before the glitch. By analyzing what happens
before the glitch, you may uncover informa tion that helps you find the source of the glitch. Alternatively, to see what is happening in
your system as a result of the trigger event, make the posttrigger period large enough to capture data after the t rigger.
134 MSO4000 and DPO4000 Series Oscilloscopes User Manual
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