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third order intermodulation curve

third order intermodulation curve

third order intermodulation curve

(OP)
Someone has never seen a curve of the products of intermodulzione of the third order that has one fallen for a frequency and then laughed them?  if as this phenomenon is called?  thanks for the help and sorry for my bad english

RE: third order intermodulation curve

I think it would help if you write in your native tongue (Italian?). We will then probably be able to understand what you want to say.

So, try again. In Italian.

Gunnar Englund
www.gke.org

RE: third order intermodulation curve

(OP)
Volevo sapere se qualcuno ha mai visto una curva dei prodotti di intemodulazione del terzo ordine che, invece di crescere come una retta ,ha un primo tratto parabolico dove raggiunge un minimo, per poi risalire. Questo fenomeno dovrebbe avere un nome particolare. Grazie  

RE: third order intermodulation curve

Google translates this as:  

"I wanted to know if someone has never seen a curve of the products of intemodulazione of the third order that, instead growing like straight,ha a first parabolic feature where it catches up a minimum, in order then to go back.  This phenomenon must have a particular name.  Thanks"

It would be helpful to see a plot of the curve.  Are you looking at spectral leakage? If so it might only be an artifact of the measurement.  
 http://www.teemach.com/FFTProp/FFTProperties/FFTProperties.htm

shows a sample of what spectral leakage looks like.  It happens when your data set going into the FFT isn't an integer multiple of your signals period.  

RE: third order intermodulation curve

Great, Zapped!

I never thought about google translation. We are still searching for the right translation. Google seems to have done a decent job. Now, what does andrea really say?

Is it a curve that starts in a parabolic (2nd order) way and then reaches a local minimum from where it returns to zero?

Sorry, Italian was just as difficult to understand as Italenglish.

Gunnar Englund
www.gke.org

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