Hi, in your picture is a peak at -12KHz.
Is it possible, that you have to calculate the absolut value from the FFT? On a normal calculator it's the function abs(). > Hi all! > > A have a little probleme with FFT. > > I use the GRC without USRP. I would like to messeaure a triangle > signal, but i never becam the right effect. I attached the picture > about the measuring. > > The problem are the followed: > > I don't why but, i have allways a peak at 0Hz. - Independent from the > type of signal > On the picture i messaure a triangle, but the next peak in the FFT > failed at 12kHz. > > Attached picture: > http://img8.imageshack.us/img8/5620/messung5.png > > Have you any Idea? > > Thank: Gergely > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- Neu: GMX DSL bis 50.000 kBit/s und 200,- Euro Startguthaben! http://portal.gmx.net/de/go/dsl02 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
