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Markers on Eye Diagrams IC615 vs IC514

miscrms

Can anyone tell me how to place markers on an eye diagram in IC615? 

We used to do this routinely in IC514 using the eyeDiagram() function in the calculator to plot the wrapped data and then using the a and b markers to make various measurements (amplitude, overshoot, jitter, rise/fall time etc).  The marker/cursor would automatically hop to whatever trace you put the mouse over as expected.  In IC615 we have tried using eyeDiagram() from calculator and the Measurements -> Eye Diagram tool from the plot window with the same result for both.  The markers will only snap on the first trace (data from 0 to the first wrap period interval), not the additional wrapped eye diagram traces. 

For example, for the plot "eyeDiagram(VT("/out") 2n 17n 120p)" the tracking cursor as well as any of the markers will only show values along the trace data from 0-120ps which is not even part of the displayed waveform as we're omitting all the data prior to 2ns.

Thanks,

Rob

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  • miscrms

    One more data point, after sitting overnight I am able to plot the above ac traces that were not working shortly after the sim was run.  I did monitor the file size of the "psf/ac.ac" file on disk and it has not changed since immediately after the sim was run, so I don't think its a matter of waiting for the data to get written to disk which was the only explanation I could think of.

    Thanks,

    Rob

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  • miscrms

    One more data point, after sitting overnight I am able to plot the above ac traces that were not working shortly after the sim was run.  I did monitor the file size of the "psf/ac.ac" file on disk and it has not changed since immediately after the sim was run, so I don't think its a matter of waiting for the data to get written to disk which was the only explanation I could think of.

    Thanks,

    Rob

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