Agilent Technologies HP 1660E Series User Manual page 219

Triggering Examples
Single-Machine Trigger Examples
Because both timers start when entering sequence level 2, they start as
soon as the positive edge of the pulse occurs. Once the negative edge
occurs, the sequencer transitions to level 3. If at that point, the
MIN_WID timer is less than 496 ns or the MAX_WID timer is greater
than 1 ms, the pulse width has been violated and the analyzer triggers.
Otherwise, the sequence is restarted.
Measurement of Minimum and Maximum Pulse Width Limits
Triggering when a Pulse Exceeds Minimum or Maximum Limits
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