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 What's the equation behind spectrumMeas() function in Viva calculator? 

Last post Tue, Jul 17 2012 2:50 AM by Andrew Beckett. 2 replies.
Started by greatqs 12 Jul 2012 08:19 PM. Topic has 2 replies.
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  • Thu, Jul 12 2012 8:19 PM

    • greatqs
    • Top 500 Contributor
    • Joined on Tue, Feb 15 2011
    • Posts 26
    • Points 460
    What's the equation behind spectrumMeas() function in Viva calculator? Reply

    I'm using spectrumMeas() function inside Viva calculator for evaluating THD, THD+N performance of Class-D amplifier outputs.

    I saw different measured results coming out of different windowing used and the help information of the function doesn't tell any more detailed equations behind it.

    I want to know how the function deal with windowing function. for example, how it deal with additional bins caused by the windowing and how to apply scaling on signal, noise and harmonic bins. 

    Thanks,

    QS

     
    • Post Points: 5

  • Mon, Jul 16 2012 6:29 PM

    • greatqs
    • Top 500 Contributor
    • Joined on Tue, Feb 15 2011
    • Posts 26
    • Points 460
    Re: What's the equation behind spectrumMeas() function in Viva calculator? Reply
    Is anyone familiar with the function could help? Thanks!

     
    • Post Points: 20

  • Tue, Jul 17 2012 2:50 AM

    Re: What's the equation behind spectrumMeas() function in Viva calculator? Reply

    Personally I don't have time at the moment to research this, so I would suggest if you want an answer quickly, you should contact customer support.

    Regards,

    Andrew.

    • Post Points: 5
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Started by greatqs at 12 Jul 2012 08:19 PM. Topic has 2 replies.