8–12
Triggers and When to Use Them
Exclusion Trigger Exclusion Trigger enables the exclusion of events over a
determined time interval. Exclusion Trigger is generated on the
selected edge when the pulse width is within or outside the
selected width range. For example (Fig. 8–8), only pulses
smaller than 25 ns or longer than 27.5 ns will generate the
trigger. The timing for the width is initialized and restarted on the
slope opposite to the edge selected. Widths of between 2.5 ns
and 20 s can be selected.
Figure 8–8. Exclusion Trigger. Only pulses within or outside the
boundaries of the width range are captured.
Applications Exclusion Triggers allow a signal’s normal width or period to be
specified, with the scope instructed to ignore the normally
shaped signals and trigger only on abnormal ones. Circuit
failures, for instance, can be looked for all the time.
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