How to exclude DC calculation sinad

Hello

I use VI Analyzer Sinad for caluculating SINAD to my data from the ADC. I wanted to exclude the FFT DC the computation of SINAD (IE excluding first point of TFF).  How could I do with SINAD VI Analyzer? I don't see any possibility to define. But when checked inside the mask VI I found options to turn ON and OFF. Since it is built in fuction of labview, I couldn't be able to modify the code. Is it possible to do? or if I can do the same thing in a different way please help me.

Thank you

You already said how to do what you want: take a FFT, on the first point zero, reverse the FFT and use it as input to SINAD. You could do the same in the time domain by finding the way your signal DC and not remove.

The DC option within the vi you mentioned does not completely remove the domain controller, it adjusts by sqrt (2) If you ask.

Rich

Tags: NI Software

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