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FFT using data from Oscilloscope.--- Matlab

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Hi there!
Could someone kindly help me out with the matlab code for finding the frequency spectrum of a pseudo random signal. I've saved the data in CSV format from the Oscilloscope (I've attached the file) and I now need the FFT! I did go through similar posts but the method explained is usually for a set periodic signal.
Any help would be duly appreciated!
 

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  • 20us_3.zip
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Common guys!! Would really appreciate some help here! This ain't my field of expertise! You are free to mock me...!;-)
 

Tell us about your problem; in short clear English sentences. for example
I want to measure sound at a sample rate of 10 kHz, block size 2048 point, 10 bit resolution.
I want to then read this data into Matlab, window the data, calculate the FFT and plot the power=spectrum .........
 

klystron said:
Tell us about your problem; in short clear English sentences. for example
I want to measure sound at a sample rate of 10 kHz, block size 2048 point, 10 bit resolution.
I want to then read this data into Matlab, window the data, calculate the FFT and plot the power=spectrum .........
Click to expand...

Hmmm Ok!! I wrote a VHDL program to generate an MLS signal using an FPGA (Xilinx SP601 board). I used a clock of 100 Mhz and I took the output from the SMA connector. Now I fed the output to the oscilloscope and got the required sequence as expected. Then I used the FFT function on the Scope but got a distorted signal and I need to know whether its because of some glitch in the method of FFT calculation in the Scope or whether there's some issue with my program itself.
So I saved the signal data as a csv file from the scope. Now I need to use this data and see how the spectrum in Matlab looks like. Then I can be sure what it is that I need to rectify!

Thanks for replying, by the way!!!
 

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