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varing results with rfft_fr16

Question asked by shekhar on Aug 25, 2010
Latest reply on Aug 17, 2011 by AndreasL
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Hi,

 

I am using rfft_fr16 to generate the fft of any signal. As a prelimnary test I tried to generate the fft of a simple sine wave and plotted it.  The problem is that when I run the same code with different input sine frequencies the ouput peak has different amplitudes. As far as I understand the amplitude should not depend on the sine frequency as long as we don't start playing with the sine wave. Can someone point out why this is happening.

 

regards,

Shekhar.

 

PS: I am using scaling factor "1". and trying it for a 512 point fft.

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