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SDS5000X Series Digital Oscilloscope User Manual
84 / 2 3 6 W W W. S I G L E N T. C O M
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.
Note: In Auto mode, if the signal satisfies the trigger conditions but cannot
trigger the oscilloscope stably, it may be that interval between two trigger
events exceeds the timeout period. Try Normal mode in this case.
Normal：Triggers and acquisitions only occur when the trigger conditions are
met. Otherwise, the oscilloscope holds the last waveform on the display and
waits for the next trigger. Normal mode is suitable for acquiring:
Only events specified by the trigger settings
Rare events
Single ： Captures and displays a single frame which satisfies the trigger
conditions, and then stops. The following trigger events are ignored until the
Single acquisition is restarted. Single mode is suitable for:
One-shot events or periodic signals, such as power-on\off waveforms
on a power rail
Rare events
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