Debug Threshold Problems
7
www.tektronix.com/tds3000
TDS3000C Series Oscilloscopes
Digital designers must quickly find and analyze
bus contention and other threshold problems.
The runt pulse trigger is useful to troubleshoot
such situations. A runt pulse is an illegal digital
signal that re-crosses a first threshold level before
crossing a second threshold level. A positive
runt pulse is a signal that first re-crosses the low
threshold level; a negative runt pulse is a signal
that first re-crosses the high threshold level.
To use the runt pulse triggers:
1. In the
Trigger
section, press the
Menu
button.
2. In the bottom menu, press
Type
until
Pulse
is selected.
3. In the bottom menu, press
Class
to select
Runt
.
4. Select, as desired,
Source
,
Polarity
,
Trigger When
,
Thresholds
, and
Mode & Holdoff
.
