Agilent Technologies 16712A Help Manual page 39

Chapter 1: Agilent Technologies 16712A 128K Sample Logic Analyzer
When Something Goes Wrong
Possible Causes
• Using a clock channel from an expander card
Reconnect the logic analyzer probes to use a clock channel from the
master card of the module.
Only the clock channels of the master card can be used in the state clock.
The master card of a module is identified in the system window.
• Clock properly connected, but slow
See "Slow or Missing Clock" on page 34.
Measurement Error: Check Probe Parametrics or
Grounding
See "Analyzer Probing Overview" on page 107 or Logic Analysis
System and Measurement Modules Installation Guide for details of
the logic analyzer connection methods.
Correlation Invalid, Module Did Not Trigger
The "correlation invalid" messages mean that although data was
acquired, it cannot be accurately time correlated.
Possible Causes
• The module was stopped before it triggered
In the Agilent Technologies 16700A/B-series logic analysis system,
when a module stops before it is triggered it cannot be accurately
correlated with the other module.
Correlation Invalid, Timer Overflowed
The "correlation invalid" messages mean that although data was
acquired, it cannot be accurately time correlated.
Possible Causes
The time between the triggers of the two modules was greater than 17
seconds, which caused the timer to overflow.
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