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166
Rise Edge Trigger — Indicates trigger is turned on to start the trace on the
rising edge of the waveform.
Fall Edge Trigger — Indicates trigger is turned on to start the trace on the
falling edge of the waveform
Threshold
The Threshold allows you to set the voltage threshold for the trigger.
To precisely position the trigger point, input the value in the Threshold field in
the trigger settings dialog box.
To roughly position the trigger point, drag the trigger point to a desired position.
To configure the trigger settings
1 . Tap the right column of the Trigger button to open the trigger settings
dialog box.
2. Select the trigger mode, trigger channel , and pulse direction in the
dropdown list.
3. Input the value in the Threshold field in the trigger settings dialog box.
4. Tap OK to save settings or tap Cancel to exit without saving.
Advanced Edge
This trigger type includes all the functions of the edge trigger type, plus two additional
options: the Rising or Falling option and the hysteresis option.
Rising or Falling option in the dropdown menu of the pulse direction: Dual edges
of a waveform can be triggered . This mode is especially useful for monitoring pulses
of both polarities at once.
Hysteresis option: It is used to reduce false triggering on noisy signals. When
hysteresis is enabled, a second trigger threshold voltage is used in addition to the
main trigger threshold. The trigger fires only when the signal crosses the two
thresholds in the correct order. The first threshold arms the trigger, and the second
causes it to fire.
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