I'm trying to take an FFT on the FPGA after getting sampled data comes from XADC , but i couldn't get any results !

Here i figured out that the problem might be from the XADC's data , i tried to fix it but so far still no results .

In my design i'm inserting an analog input signal to VP/VN pins on XADC header , then i'm trying to get some data comes out from the 1MSPS XADC .

When i plot the output data it looks as it sampled correctly , but when i try to take its FFT whether on FPGA FFT CORE or on MATLAB , i get no results . The sampled signal and its FFT are shown below in the pics .

Also i tried many frequencies for the input signal starts from 10KHz up to 480KHz , but they are all giving the same result , empty window in the Freq-domain .

If someones know what's the problem i would really appreciate the help .

## Question

## mohamed shffat 2

Hello

I'm trying to take an FFT on the FPGA after getting sampled data comes from XADC , but i couldn't get any results !

Here i figured out that the problem might be from the XADC's data , i tried to fix it but so far still no results .

In my design i'm inserting an analog input signal to VP/VN pins on XADC header , then i'm trying to get some data comes out from the 1MSPS XADC .

When i plot the output data it looks as it sampled correctly , but when i try to take its FFT whether on FPGA FFT CORE or on MATLAB , i get no results . The sampled signal and its FFT are shown below in the pics .

Also i tried many frequencies for the input signal starts from 10KHz up to 480KHz , but they are all giving the same result , empty window in the Freq-domain .

If someones know what's the problem i would really appreciate the help .

Regards

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