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Chapter 5 To Trigger the Oscilloscope RIGOL
DS8000-R User Guide 5-23
Note: The lower limit of the pulse width must be smaller than the upper limit.
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
(when "<>" is selected as the trigger condition, Level Select is a sub-menu under
More) to select the desired level type for adjustment.
Level A: only adjusts the upper limit of the trigger level, and the lower limit of the
trigger level remains unchanged.
Level B: only adjusts the lower limit of the trigger level, and the upper limit of the
trigger level remains unchanged.
Level AB: adjusts the upper and lower limits of the trigger level at the same time, and
the trigger level deviation (the difference between the upper limit and lower limit of
the trigger level) remains unchanged.
Click on the trigger level setting label
at the upper-right corner of the
screen. Then a "Trigger Setting" window is displayed. In the Level field, input a
value with the pop-up numeric keypad. You can also use the Up and Down arrow at
the right of the Level field to increase or decrease the trigger level. During the
adjustment of trigger level, two trigger level lines appear on the screen, and they
move up and down with the change of the trigger level. At the same time, the
real-time trigger level information is displayed at the lower-left corner of the screen
(as shown in the figure below, H indicates the upper limit of the trigger level, L
indicates the lower limit of the trigger level, and â–³ indicates the trigger level
deviation). When you stopping modifying the trigger level, the trigger level line and
the trigger level information at the lower-left corner of the screen disappear in about
2 s. The current trigger level deviation is displayed at the upper-right corner of the
screen.
Trigger Mode:
For details, refer to descriptions in "Trigger Mode".
Trigger Parameter Setting:
Set the trigger parameters (trigger holdoff and noise rejection) under this trigger
type. For details, refer to descriptions in "Trigger Holdoff" and "Noise
Rejection".
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