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RIGOL Chapter 5 To Trigger the Oscilloscope
5-24 DS8000-R User Guide
Window Trigger
Window trigger provides a high trigger level and a low trigger level. The instrument
triggers when the input signal passes through the high trigger level or the low trigger
level.
Trigger Type:
Click Type to select "Window". 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 switch the trigger source 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 to select the input signal the edge on which the oscilloscope triggers.
âš«
Rising: triggers on the rising edge of the input signal when the voltage level
is higher than the preset high trigger level.
âš«
Falling: triggers on the falling edge of the input signal when the voltage level
is lower than the preset low trigger level.
âš«
Either: triggers on the rising or falling edge of the input signal when the
voltage level meets the preset trigger level.
Trigger Position:
After selecting the window type, click Position to select the trigger position so as to
further specify the time point of trigger.
âš« Enter: triggers when the input signal enters the specified trigger level range.
âš« Exit: triggers when the input signal exits the specified trigger level range.
âš« Time: triggers when the accumulated hold time since the input signal entered
the specified trigger level range is equal to the window time. When this type is
selected, click Time to set the window time. You can also use the numeric
keypad or scroll with the mouse to set it. Its available range is from 8 ns to 10 s.
Level Selection and Adjustment of Trigger Level:
After the trigger condition setting is completed, you need to adjust the trigger level
to correctly trigger the signal and obtain a stable waveform. Click Level Select to
select the desired level type for adjustment.
âš« Level A: only adjusts the upper limit of the trigger level, and the lower limit of
the trigger level remains unchanged.
âš« Level B: only adjusts the lower limit of the trigger level, and the upper limit of
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