HP 1660CP Series User Manual page 218

The Analyzer Trigger Menu
Modifying the user macro
Using bit patterns, ranges, and edges
Bit patterns are set to match specific data values, and ranges are set to match
a range of bit patterns. In the Timing Acquisition mode, edges are set to
match specific edges of a timing pulse.
Using storage qualification
Store qualification lets you store all data, no data, or just selected data,
before trigger occurs.
Setting < and > durations (Timing only)
When a resource term is found during a timing sequence evaluation, you can
dictate how long the term must remain before it actually becomes true. When
less than (<) or greater than (>) duration is assigned, the secondary
branching (Else on) is not available.
> field When greater than (>) is used, the analyzer continues sequence
level evaluation only after the resource term has been true for greater
than or equal to the amount of duration specified.
< field When less than (<) is used, the analyzer continues sequence
level evaluation only after the resource term has been true for less than
or equal to the amount of duration specified. Using less than requires
four sequence levels.
Using the Occurrence Counters
Occurs field When "Occurs" is selected, the < and > duration functions
change to an occurrence counter. Use the occurrence counter to delay
sequence evaluation until the resource term has occurred a designated
number of times. If the "else on" branch becomes true before all
specified occurrences of the primary "Trigger on" branch, the secondary
"else on" branch is taken.
Using the timer
Timers are like other resource terms in that they are either true or false.
Timers can be set to Start, Stop, Pause, or Continue as the analyzer enters a
sequence level. The two timers are global, so each sequence level can control
the same timer. The default timer condition in all sequence levels is Off.
Timers start as you enter the sequence level, and when the timer count
expires, the timer becomes true. If a timer is paused in one level, it must be
continued in another level before it can count through.
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