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Chapter 5 To Trigger the Oscilloscope RIGOL
MSO2000A/DS2000A User’s Guide 5-15
Qualifier:
Press Qualifier to set the trigger conditions of runt trigger.
None: do not set the trigger condition of runt trigger.
> : trigger when the runt pulse width is greater than the lower limit of pulse
width. Press Lower Limit and turn or the inner knob of the navigation knob
to adjust the minimum runt pulse width at a relatively smaller step or turn the
outer knob of the navigation knob to adjust the minimum runt pulse width at a
relatively larger step. The range available is from 2 ns to 4 s.
< : trigger when the runt pulse width is lower than the upper limit of pulse width.
Press Upper Limit and turn or the inner knob of the navigation knob to
adjust the maximum runt pulse width at a relatively smaller step or turn the
outer knob of the navigation knob to adjust the maximum runt pulse width at a
relatively larger step. The range available is from 2 ns to 4 s.
< > : trigger when the runt pulse width is greater than the lower limit and lower
than the upper limit of pulse width. Press Upper Limit and set the maximum
pulse width of runt trigger using
or the navigation knob by referring to the
method mentioned above; the range is from 10 ns to 4 s. Press Lower Limit
and set the minimum pulse width of runt trigger using
or the navigation
knob by referring to the method mentioned above; the range is from 2 ns to
3.99 s.
Note: The lower limit of the pulse width must be lower than the upper limit.
Vertical Window and Trigger Level:
After the trigger condition setting is completed, you need to adjust the trigger level
to correctly trigger the signal and obtain stable waveform. The adjustment mode of
the trigger level is different when different vertical window is selected in the runt
trigger. Press Vertical and use to select the desired vertical window or press
down Window continuously to switch the vertical window. You can choose to only
adjust the upper limit, the lower limit or both of them.
Note: Under the “Runt trigger” menu, you can press TRI GGER LEVEL
continuously to switch among different vertical window.
After the vertical window type is selected, you can rotate TRI GGER
LEVEL to
adjust the trigger level. During the adjustment, two orange trigger level lines and
trigger marks (
and ) appear on the screen and move up or down with the
rotation of the knob. At the same time, the current trigger level values are displayed
at the lower left corner of the screen; wherein, Up Level denotes the trigger level
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