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Command Dictionary Set Observe Threshold
FastScan and FlexTest Reference Manual, V8.6_4
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Set Observe Threshold
Tools Supported: FastScan
Scope: All modes
Usage
SET OBserve Threshold integer
Description
Specifies the minimum number of observations necessary for the Analyze
Observe command to consider a point adequately observed.
The Set Observe Threshold command specifies the minimum number of
observations that the Analyze Observe command must encounter during fault
simulation of a selected number of random patterns to consider a point adequately
observed. This allows the Analyze Observe command to calculate the
observability test coverage, giving the percentage of adequately observed pins.
When the Analyze Observe command fails to detect an output pin for the
minimum number of random patterns (as defined by the observe threshold),
FastScan identifies the output pin as inadequately observed. You can use the
Report Observe Data command to display detailed results of the analysis.
You use the Set Observe Threshold and Analyze Observe commands primarily for
simulating Built-In Self Test (BIST) circuitry.
Arguments
• integer
A required integer, greater than or equal to 0, that specifies the minimum
number of observations that you consider adequate during random pattern
simulation. The default value upon invocation is 4.