Taking FFT of real time data from TCP.

[HamzaJavaid]

I am receiving data from TCP read. My data is unsigned integer which I do type casting to covert it back to integer 32 (1D) Which is showing at WAVEFORM GRAPH correctly. But if i take its FFT I am not getting correct FFT. what should I do to get Correct FFT

[GerdW]

Hi Hamza,

But if i take its FFT I am not getting correct FFT.

In which way is that FFT result "not correct"?

what should I do to get Correct FFT

Don't use ExpressVIs to convert your integer array into a waveform.

There is a BuildWaveform function…

(To get proper FFT results you need to provide a correct dt for your waveform!)

Edit:

Another problem is that InsertIntoArray function: why do you insert an 1D array into another 1D array using an incrementing index? Wouldn't it make more sense to append new data to old data?

(InsertIntoArray is the wrong function most of the times, BuildArray should be used instead…)

Cleaning up code also helps to improve its readability: