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Unable to plot phase noise

sebastion

Hi,

After running pnoise: jitter analysis, I wanted to plot the phase noise by choosing:

Direct Plot Form => pnoise jitter => Phase Noise => dBc => Plot

I got some error messages shown as follow:

*Error* flip: can't handle flip(nil)
*Error* flip: can't handle flip(nil)
*Error* flip: can't handle flip(nil)
*Error*   Evaluating expression (_drplPmNoise(?modifier "dBc" ?dsb
          t)).
*Error* ("abs" 0 t nil ("*Error* abs: can't handle abs(nil)"))
*Error*   Trying to plot expression <_drplPmNoise(?modifier "dBc"
          ?dsb t)>, which does not evaluate to an object that can be
          plotted, like waveform or parametric wave. Please refer to
          the Wavescan User Guide to see what all types of objects
          can be plotted in Wavescan. Expression which evaluates to
          only those type(s) of objects can be plotted.

I could get the plot when I choose:

 Direct Plot Form => pnoise => Phase Noise => Plot

May I know what is the problem?

 Thanks.

Parents

  •  What subversion of virtuoso or icms are you using?  This looks suspiciously like a known issue that was fixed about 18 months ago in IC 5.10.41.500.6.130 and 6.1.3.500.5 .   I recommend upgrading to the latest ISR available on downloads.cadence.com .  You may need to contact Cadence Customer Support if upgrading your software doesn't resolve your issue.

     Also, if you have your nets named Vout+ or Vout-, try renaming them to VoutPlus and VoutMinus.  There is similar issue where that was causing issues (and is fixed in the latest ISR on downloads.cadence.com).

     

    best regrds,

    Tawna

     

Reply

  •  What subversion of virtuoso or icms are you using?  This looks suspiciously like a known issue that was fixed about 18 months ago in IC 5.10.41.500.6.130 and 6.1.3.500.5 .   I recommend upgrading to the latest ISR available on downloads.cadence.com .  You may need to contact Cadence Customer Support if upgrading your software doesn't resolve your issue.

     Also, if you have your nets named Vout+ or Vout-, try renaming them to VoutPlus and VoutMinus.  There is similar issue where that was causing issues (and is fixed in the latest ISR on downloads.cadence.com).

     

    best regrds,

    Tawna

     

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