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SDS5000X Series Digital Oscilloscope User Manual
15.3 Trigger Level
Both analog and digital triggers must have a correct trigger level value. The
oscilloscope judges whether a waveform satisfies the trigger condition when it
crosses the trigger level. If it does, the crossing time is the trigger position. In
the following figure, the trigger condition is set as rising edge. When the signal
with positive slope crosses the trigger level, the trigger condition is satisfied and
the time point the signal crosses the level is the trigger position.
In some special trigger, the system will automatically set the trigger level, such
as using AC Line as the trigger source.
15.4 Trigger Mode
The trigger mode determines how the oscilloscope acquires waveforms.
Auto：An internal timer triggers the sweep after a preset timeout period if no
trigger has been found, so that the oscilloscope continuously updates the
display whether a trigger happens or not. Auto mode is suitable for unknown
signals or DC signals.
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