How to find the highest the second highest and the third highest frequency component from an input signal using pxi-6221

[L.I.G]

Hello,

I have a problem tha how to find frequency component in an input signal. So I mean I have an input variable to decide e.g if it equals 1 it means I want to know the highest periodic frequency component, if it is 2 it means I want to know the the value of the first and the second highest frequency componenet and if it is 3 I want to know the 1st, 2nd and 3rd one... and so on. The maximum value of this parameter is 10.

And I have an other input variable to decive the minimum amplitude level I am interested in - I don't want to measure below this level.

I am using a pxi-6221

If anybody knows a good solution please share it with me.

Many thanks

Gabor

[Simon_T]

Szia Gábor,

Try using the "Extract Multiple Tone Information" VI for extracting multiple sine-wave components from a measured waveform.

If you open the context thelp (Ctrl+H) you can see the parameter types that this VI requires.

If you click on detailed help, you can get more information, and if you scroll down to the bottom of the page, you can also see a link to working example VI that uses this function.

Let us know how it goes.

Üdv,

Simon Tamás

[L.I.G]

Hello,

Many thanks it was a great help!

Üdv: Gabor