[Discuss-gnuradio] Splitting a vector at the output of the FFT

[Alejandro Pascual Laguna]

Hello GNUR's!

I am a newbie in this community so I may pose a very simple question...
I am trying to split via GUI the output vector of the FFT block in two halves, one with the upper part and one with the lower part -i.e. I don't want a duplicate of the output vector-. Say I have a FFT of 1024 points, how do I split the output into the first 512 points and the final 512 points? This leads me to the related question of how is the FFT implemented: is the DC component coming first and then the positive part of the spectrum with fftSize/2 samples to be finally followed by fftSize/2-1 of the negative part? Or is it some other way? Moreover, is it normalized by the number of points?

Thank you very much.

Cheers!