Triggering on a runt pulse
Use this procedure to set the oscilloscope to trigger when a runt pulse occurs.
You can also trigger when a runt pulse is less than, greater than, equal to, or not
equal to a set time period (width).
A runt pulse is a pulse that crosses one threshold level but fails to cross a second
threshold before recrossing the first. Therefore, a runt trigger needs two threshold
levels to define the two levels that a signal must pass through to be considered a
valid (nonrunt) signal. See Available trigger types on page 42.
Runt pulse triggering is most often used to troubleshoot or analyze digital signals.
The minimum runt pulse width setting is 1 ns.
1. Push the Trigger Menu front-panel button.
2. Push the Type side-menu button.
3. Use the Multipurpose knob to select and click Runt.
4. Push the Source side-menu button and use the Multipurpose knob to select
and click the channel to use as the trigger signal source.
5. Push the Polarity side-menu button and use the Multipurpose knob to select
and click the runt pulse polarity (positive, negative, or either) to trigger on.
Trigger setup
TBS1000C Series Oscilloscopes User Manual 61
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