Thank you very much ! To obtain a real FFT i can use Float to Complex block ?
Inviato da iPhone > Il giorno 19 apr 2021, alle ore 20:36, Kevin Reid <kpr...@switchb.org> ha > scritto: > > > GNU Radio is designed for working with IQ / complex signals. You are seeing > the symmetric spectrum that results from treating a real-valued signal as a > complex one with a zero quadrature (imaginary) component. The second peak is > the mirror image of the first. > > It is offset on the scale to 2 kHz because you have specified a nonzero > center frequency, which offsets the frequency numbers on the scale but does > not change the actual data processing.
