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SDS1000X-E&SDS1000X-U User Manual
59
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Trigger
For trigger, you set certain trigger condition according to the requirement and
when a waveform in the waveform stream meets this condition, the oscilloscope
captures this waveform as well as the neighboring part and displays them on the
screen. For digital oscilloscope, it displays waveform continuously no matter
whether it is stably triggered, but only stable trigger can ensures stable display.
The trigger circuit ensures that every time base sweep or acquisition starts from the
input signal and the user-defined trigger condition, namely every sweep is
synchronous to the acquisition and the waveforms acquired overlap to display
stable waveform.
The following is the schematic diagram of the acquisition memory. As shown in the
figure below, the position of the trigger event is determined by the reference time
point and the delay setting.
Trigger setting should be based on the features of the input signal, thus you need
to have some knowledge of the signal under test to quickly capture the desired
waveform.
The oscilloscope provides abundant advanced trigger functions which can help
you to focus on the desired waveform details. These trigger types are edge, slope,
pulse, video, window, interval, dropout, runt, pattern and serial trigger. This
chapter will mainly introduce all these trigger functions which mentioned above in
details and tell you how to set the trigger conditions to capture desired waveform.
The contents of this chapter:
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