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Note
Trigger on Pattern
Duration
8-8 Timing: Using the Analyzer
specified, and the least significant bit is probe signal 0, or the least
significant bit of the label specified. Refer to "Entering Numerical
Values" in the previous chapter for valid pattern value options.
The command
trigger on pattern X_lower = 3AH
sets analyzer to test for the pattern of bits 00111010B on the lower
eight signals of the probe and, if found, trigger the filling of trace
memory.
The "hold" time for the trigger on a pattern is 30 nanoseconds.
Therefore the "trigger on pattern..." command is equivalent to
"trigger on greater_than 20 nsec_of ....". Refer to "Trigger on
Pattern Duration" below.
You can specify, as part of the trigger condition, a pattern
duration. The duration specifies that a pattern will exceed
("greater_than") or not exceed ("less_than") the amount of time
specified in order for the trigger condition to be met.
If the pattern is valid but the duration is not met, there is a 20 ns
reset time before looking for a pattern again.
Greater Than Duration
The trigger occurs after the pattern is present on the probe for at
least the specified time duration. You can select a duration from
30 ns to 10 ms in 10 ns increments.
The command
trigger on greater_than 100 nsec_of XBITS .2
=0 <RETURN>
sets the analyzer to trigger a trace if probe bit 2 is logically false for
more than 100 nanoseconds.
<RETURN>
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