Increasing Measurement Accuracy
and Time-Interval Measurement
Time-Interval Measurements
The faster the transition, the smaller the time error introduced by dc level
errors. This is true both for edges of the same polarity and for edges of
opposite polarity, as well as for channel-to-channel measurements,as
illustrated by Figure 9-4. If the edges have a non-uniform slew rate with
fast and slow regions, try to reference the time-interval measurement to the
fastest-changing region as shown in Figure 9-5.
Figure
9-4.
Faster
transitions
decrease
eect
of
dc
oset
errors.
Figure 9-5. Measure time intervals at fastest-changing part of transition.
9-12
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