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Chapter 5 To Trigger the Oscilloscope RIGOL
DS8000-R User Guide 5-9
Pulse Trigger
Triggers on the positive or negative pulse with a specified width. In this mode, the
oscilloscope will trigger when the pulse width of the input signal satisfies the
specified pulse width condition.
In this oscilloscope, positive pulse width is defined as the time difference between
the two crossing points of the trigger level and positive pulse; negative pulse width is
defined as the time difference between the two crossing points of the trigger level
and negative pulse, as shown in the figure below.
Figure 5-3 Positive Pulse Width/Negative Pulse Width
Trigger Type:
Click Type, and select "Pulse". 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.
Polarity:
Click Polarity continuously to select the desired polarity. The polarities available are
positive polarity (
) and negative polarity ( ).
Trigger Condition:
Click When to select the trigger condition.
âš« When you select "Positive" for polarity, ">" for trigger condition, the oscilloscope
Trigger
Level
Trigger
Level
+Width
A
B
-Width
A
B
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