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FFT doesnt produce expected value

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My vi attached opens a spreadsheet file attached and input values of approx 0.37 into the spectra measurement vi. I am expecting values around 0.37 in my FFT output, but lo I see -80! 


If I understand DSP correctly, FFT suppose to show the occurance frequency of a particular amplitude. I am very sure I have fed values of around 0.37 into the spectra vi. So what is wrong?


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Accepted by topic author sunflower2772

In the spectral measurement configuration you have enabled the Result as dB that you have to change to linear... It is done now check it...




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The best solution is the one you find it by yourself
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You the man!

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