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Creating Smith Chart via Skill

Ivars

Hi,

I'm trying to plot S11 data on a Smith Chart using Skill. I've tried the following sequence:

openResults("/path/to/psf/directory")

selectResults("sp")
wid=awvCreatePlotWindow()
awvSetCurrentWindow(wid)
awvSetDisplayMode( wid  "smith" )
awvSetSmithModeType( wid "admittance")
awvPlotWaveform( wid list( getData("/s11")) ?expr list( "S11" ) )

The results is a waveform window plotting S11 as a magnitude versus frequency and a second window with an empty Smith Chart.

 If I do a awvGetCurrentWindow() with the Smith Chart window active (at the front) it gives the same window ID as the window with the S11 magnitude plot.

The problem appears to be with the awvSetDisplayMode() command. It creates a new window for the Smith Chart but doesn't seem to allow the awvPlotWaveform command to use it.

I've also tried using the awvSetDisplayMode after plotting the S11 data, but that doesn't work either - it generates another window with an empty Smith Chart.

I'm using IC6.1.5.500.17

Any advice on how to properly use awvSetPlotMode() woud be appreciated. Thanks.

 Ivars

  • To follow-up on my own question, I found a solution to problem in Solution 11745974 on the Cadence Support website.

    The trick is to set the Smith Chart mode using the undocumented ?graphType option for the awvPlotWaveform() function and not the awvSetDisplay() mode function.

    The following code works:

    openResults("/path/to/psf/directory")

    selectResults("sp")
    wid=awvCreatePlotWindow()
    awvSetCurrentWindow(wid)
    awvPlotWaveform( wid list( getData("/s11")) ?expr list( "S11" ) ?graphType "admittance")

     The ?grapType option is only available  in IC6.1.5 ISR3 (6.1.5.500.3) and beyond, It would have been helpful if this option was documented. GraphType can also be "impedance" and possibly others (again better doucmentation would help).

     The solution suggest the following Ocean commands should work:

    newWindow()
    displayMode("smith")
    smithType("admittance")
    plot( getData("/sll"))

    but I get an error message

    ERROR (WIA-1021): Morphing from Rectangular to Smith mode is not supported

     

    Ivars

     

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