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The Trigger Menu
When Field
If the count set in the Count field is one, the trigger event will be the first
pattern event that meets both the pattern specification and the duration
specification. If the count is greater than one, only the first pattern event
must meet the duration specification. Once the pattern duration
specification has been met, subsequent pattern events that meet the pattern
specification can be of any duration and each such pattern event will
contribute to meeting the count specification.
Example
With a pattern specification of HXX, a duration specification of <100 ns, and
a count of 3; a pulse string with pulse widths 200 ns, 80 ns, 150 ns, 50 ns,
75 ns, 20 ns would trigger on the trailing edge of the 50 ns pulse. In this
example, the 80 ns pulse meets the duration specification and is count 1, the
150 ns pulse is count 2, and the 50 ns pulse is count 3.
Range When this field is active, the scope triggers on the first transition
that causes the pattern specification to be false for every input used in
the pattern trigger specification if the specified pattern has been true for
greater than the first time value and less than the second time value that
make up the pattern duration range.
If the pattern specification remains true for longer than the maximum
duration range limit or becomes false before the minimum duration range
limit, the search for a trigger condition starts again the next time the pattern
specification becomes true. If the pattern specification becomes false within
the specified duration time range, the trigger point will be the point at which
the pattern specification becomes false.
The minimum pattern duration time can be any value between 20 ns and
160 ms in 10 ns steps. The maximum pattern duration time must be at least
10 ns greater than the minimum time value.
If the count set in the Count field is one, the trigger event will be the first
pattern event that meets both the pattern specification and the duration
specification. If the count is greater than one, only the first pattern event
must meet the duration specification. Once the pattern duration
specification has been met, subsequent pattern events that meet the pattern
specification can be of any duration and each such pattern event will
contribute to meeting the count specification.
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