SIGLENT SDS1102X, Руководство пользователя

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SIG L ENT
SDS1000X User Manual
49
To Trigger the Oscilloscope
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 Event
↓
Pre-trigger Buffer Post-trigger Buffer
Acquisition Memory
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.
SDS1000X 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.
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