Stats

  • Locked Locked
  • Replies 7
  • Subscribers 125
  • Views 15431
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

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

Parents

  • Going to 6.1.5.500.9 does indeed seem to have fixed the marker issue.  Unfortunately we seem to be having a new problem on this version.  After running a sim, upon trying to plot or refresh a differential trace I get the an error I haven't seen before:

    expression evaluation failed: Cannot get value from token.
    No valid waveforms for plotting

    Plotting either of the two signals we're trying to take the difference of works fine, and we had never seen this behavior in 6.15.500.2 for the same sim/signals.  Whats even wierder is that usually if I wait 5-10 min and try plotting again (without resimming) it works.  Any thoughts?

Reply

  • Going to 6.1.5.500.9 does indeed seem to have fixed the marker issue.  Unfortunately we seem to be having a new problem on this version.  After running a sim, upon trying to plot or refresh a differential trace I get the an error I haven't seen before:

    expression evaluation failed: Cannot get value from token.
    No valid waveforms for plotting

    Plotting either of the two signals we're trying to take the difference of works fine, and we had never seen this behavior in 6.15.500.2 for the same sim/signals.  Whats even wierder is that usually if I wait 5-10 min and try plotting again (without resimming) it works.  Any thoughts?

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.