B
A
P
Figure 10.12:
Trigger hold off
A
Trigger
B
Hold off
The feature is most useful in combination with the interval timer and/or the event
counter.
10.4.4
Interval timer
A highly sophisticated trigger add
-
on is the interval timer. The interval timer is
used to define a time relation between two trigger events. When the time
relation is correct, a trigger is generated.
The following relations are possible:
l
Less:
The time interval between two consecutive trigger events is less than
the specified time interval.
l
More:
The time interval between two consecutive trigger events is more
than the specified time interval.
l
Between:
The time of the second trigger event is within a specified time
interval that starts a specified time after the first trigger event.
l
NotBetween:
The time of the second trigger event is not within a specified
time interval that starts a specified time after the first trigger event.
The interval timer operates on samples (2 to 65535). In the Perception software,
this is translated into time. At 1 MS/s sample rate, this results in a maximum of
65.535 millisecond.
Interval timer
-
Less
This interval time mode is fairly straightforward. When the second trigger event
is within the set time interval, a trigger is generated.
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