HP 1660CP Series User Manual page 222

The Analyzer Trigger Menu
Resource terms
Assigning Bit by Bit
Bit pattern terms Just to the right of the bit pattern name fields are
the term assignment fields. When any of the individual assignment fields
are selected, a keypad appears. Use this keypad to assign real values or
Don't Care (X) values.
Edge terms Assign edge terms the same way you do bit pattern terms.
Edge terms can be used singularly or in combination with each other
across all assigned channels. When you specify an edge on more than
one channel, the analyzer ORs the edges.
After the assignment menu closes, you may see "$" indicators in the field
display. A "$" indicates the assignment can't be displayed in the selected base
because of Don't Cares. When you display the assignment in binary, however,
you can see the actual pattern.
Range terms Range terms require an upper and lower bit pattern
boundary. The range is recognized as the data that is numerically
between or on the two specified boundaries. In addition, the range must
be contained in a single label across a single pod pair, with no clock bits
allowed.
Timer terms Timers are either true or false. Timers start as you enter
the sequence level, and when the count expires, the it becomes true. If a
timer is paused in one level, it must be continued in another level before
it can count through.
As more sequence levels are added, the timer status in the new levels
defaults to Off. Timers must be continued or started in each new level if it is
appropriate. When a timer expires or stops, its count resets to zero.
Combination of terms
Combination terms are configured and selected from within trigger sequence
levels. All user-defined resource terms can be combined to create complex
qualifiers that occupy a single assignment field space.
When you select the term field in a Sequence Level menu, a pop-up selection
list appears. If you then select "Combination," a logical assignment menu
appears. Use this menu to turn on resource terms and input them into a
chain of logical operators.
When the combination is placed in the assignment field, if the term is too
long to fit in the assignment field, the display is truncated.
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