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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

  •  Hi Andrew,

    We upgraded the subversion to 5.10.41.500.6.143 and we are able to plot the phase noise (from pnoise jitter option). Thanks.

    However, we ran into another problem. In this subversion, we could not run the simulation in GUI mode.The simulation can be carried out by running runSimulation in netlist directory.

    The error messages are shown as follow:

    *Error* Errors encountered during simulation. The simulator run log has not been generated.
    Possible cause could be an invalid command line option for the version of the simulator
    you are running. Choose Setup->Environment and verify that the command line options
    specified in the userCmdLineOption field are supported for the simulator.
    Alternatively, run the simulator standalone using the runSimulation file in the netlist
    directory to know the exact cause of the error.
     

    And the runSimulation file is shown as below:

    spectre  -env artist5.1.0 +escchars +log ../psf/spectre.out -format sst2 -raw ../psf   +lqtimeout 900 -maxw 5 -maxn 5 input.scs
     

    May I know what is the cause of the problem? Thanks.

Reply

  •  Hi Andrew,

    We upgraded the subversion to 5.10.41.500.6.143 and we are able to plot the phase noise (from pnoise jitter option). Thanks.

    However, we ran into another problem. In this subversion, we could not run the simulation in GUI mode.The simulation can be carried out by running runSimulation in netlist directory.

    The error messages are shown as follow:

    *Error* Errors encountered during simulation. The simulator run log has not been generated.
    Possible cause could be an invalid command line option for the version of the simulator
    you are running. Choose Setup->Environment and verify that the command line options
    specified in the userCmdLineOption field are supported for the simulator.
    Alternatively, run the simulator standalone using the runSimulation file in the netlist
    directory to know the exact cause of the error.
     

    And the runSimulation file is shown as below:

    spectre  -env artist5.1.0 +escchars +log ../psf/spectre.out -format sst2 -raw ../psf   +lqtimeout 900 -maxw 5 -maxn 5 input.scs
     

    May I know what is the cause of the problem? Thanks.

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