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Trace not working after applying the recommended calibration values

24-May-2024

In corner cases, it can happen that multiple valid regions are visible in the trace calibration diagram (shown as gaps or ‘eyes’) and a non-working setting is recommended by the Trace Line Calibration tool. When such a setting is selected, the trace session will fail to trigger and the analyzer will remain in the WAITING state.





The above image shows an example of a situation where the calibration diagram shows two potentially valid eyes of which only one results in a working trace connection.


Possible solutions

Run the trace calibration multiple times
Check if the recommended value (shown as R) moves within the diagram while executing the trace calibration multiple times. If the recommended value jumps between two separate eyes, try the recommended calibration setting for both options.


Manually set the calibration values
Observe the calibration diagram for larger eyes within the field of X’s and manually determine and enter the Phase and Vref values based on the center of the respective eye.


Small eyes in the calibration diagram are a result of signal integrity issues. Signal distortion can prevent the BlueBox from capturing the trace stream correctly. Refer to this article for more information.


More resources in winIDEA Help

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