Rigol DHO900 User Manual page 98

Triggering the Oscilloscope
Source Selection
Click or tap the Source drop-down button to select CH1-CH4. For details, refer to
Trigger Source
label at the top of the screen.
Only when you select the channel that has signal inputs as the trigger source, can you
obtain a stable trigger.
Polarity
Select the pulse polarity of Runt trigger under the Polarity item.
• Positive
•
Negative
Trigger Condition
Set the Runt trigger condition in the When item.
• None: indicates not setting the trigger condition of Runt trigger.
• >: triggers when the runt pulse width is greater the Lower limit of pulse width.
Click or tap the input field of Lower to set the minimum pulse width of Runt
trigger with the pop-up numeric keypad. You can also use the corresponding
multipurpose knob to modify the value.
• <: triggers when the runt pulse width is smaller than the upper limit of pulse
width. Click or tap the input field of Upper to set the maximum pulse width of
Runt trigger with the pop-up numeric keypad. You can also use the
corresponding multipurpose knob to modify the value.
• < >: triggers when the runt pulse width is greater than the lower limit and
smaller than the upper limit of pulse width. Click or tap the input field of Upper
to set the maximum pulse width of Runt trigger with the pop-up numeric
keypad. Click or tap the input field of Lower to set the minimum pulse width of
Runt trigger with the pop-up numeric keypad. You can also use the
corresponding multipurpose knob to modify the maximum and minimum pulse
width. The lower limit of the pulse width must be smaller than the upper limit.
Trigger Mode
In Sweep, select Auto, Normal, or Single as the trigger mode. For details, refer to
descriptions in
Trigger Parameter Setting
You can refer to
noise rejection under this trigger type.
DHO800 User Guide
84
. The selected trigger source is indicated in the trigger information
: indicates that the instrument triggers on the positive runt pulse.
: triggers on the negative runt pulse.
Trigger Mode
.
Trigger Holdoff Noise Rejection
and
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to set the trigger holdoff and