
7 Analog Modules Time Interval Analyzer
232 System Reference, January 2001
For a periodic signal, the jitter test has to measure
multiple periods that are not averaged. To perform a
single period measurement multiple times for
EXT(External) trigger mode, the number of measurement
times must be set to
points
and the trigger for each
measurement must be specified. In this case, after a
measurement is done, the trigger for the next measure-
ment must be set at 30 µs or later.
If the trigger mode is AUTO, the measurement is started at
a specified edge of the signal to be measured. In this case,
if 2 or more is set
points
, that is, multiple measurements
are performed, the TIA automatically starts the second
and later measurements.
Figure106
trigMode
and
trigEdge
CH 1
trigMode: AUTO, trigEdge: RISING
Trigger
1st Trigger
Signal
1st Trigger
2nd Trigger
trigMode: EXT, trigEdge: RISING
2nd Trigger
CH 1
period period
period period
3rd Trigger
period
30 µs or more
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