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RIGOL Chapter 5 To Trigger the Oscilloscope
5-30 DS8000-R User Guide
Nth Edge Trigger
Triggers on the Nth edge that appears after the specified idle time. For example, in
the waveform shown in the figure below, the instrument should trigger on the
second rising edge after the specified idle time (the time between two neighboring
rising edges), and the idle time should be within the range between P and M (P<Idle
Time<M). Wherein, M is the time between the first rising edge and its previous rising
edge; P is the maximum time between the rising edges that participate in counting.
M
P<Idle Time<M
Edge Type=
Edge Num=2
P
Figure 5-12 Nth Edge Trigger
Trigger Type:
Click Type to select "Nth Edge". Then, the current trigger setting information is
displayed at the upper-right corner of the screen, as shown in the figure below.
Source Selection:
Click Source to open the signal source list and select CH1-CH4. For details, refer to
descriptions in "Trigger Source". The current trigger source is displayed at the
upper-right corner of the screen.
Note: Only when we select the channel (that has been input with signals) as the
trigger source, can we obtain a stable trigger.
Edge Type:
Click Slope continuously to select the input signal edge on which the oscilloscope
triggers.
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Rising: triggers on the rising edge of the input signal when the voltage level
meets the specified trigger level.
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Falling: triggers on the falling edge of the input signal when the voltage level
meets the specified trigger level.
Idle Time:
Click Idle Time to set the idle time before the edge counting in Nth edge trigger. Use
the pop-up numeric keypad or scroll with the mouse to set the idle time.
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