8–27
Dropout Trigger Dropout Trigger (Fig. 8–20) provides triggering whenever the
signal disappears for a selectable period of time. The trigger is
generated at the end of the time-out period following the “last”
trigger source transition. Time-outs of between 25 ns and 20 s
can be selected.
Figure 8–20. Dropout Trigger Menu (see page 8–37)
Applications Dropout Trigger is useful for detecting interruptions in data
streams such as network hang-ups and microprocessor crashes.
A typical application is on the last ‘normal’ interval of a signal
that has disappeared completely. This is essentially a single-
shot application, usually with a pre-trigger delay. RIS acquisition
is not useful here because the timing of the trigger timeout is
insufficiently correlated with the input channel signals.
Dropout
Trigger after
timeout if no edge
occurs on
With
slope
Within Time (25 ns to 20 s)
Positive|Negative
1|2|3|4|Ext|Ext10
To Next Page
Loading...
