On 01/18/2017 01:31 PM, Marc Pàmies Massip wrote: > Hi, > > Maybe this is a stupid question for experts in SDR, but I haven't find a > clear explanation yet. I know it is normal to have a DC offset in the > center of the spectrum, but I am surprised by the amount of static peaks > that I see sometimes in specific bands (you can find attached some > images to better understand what am I talking about). It is obvious that > those are not "real" signals, in fact when I re-tune the SDR peripheral > they don't move according to the frequency displacement. I want to > understand if it is due to a software problem (the screenshots were > taken from SDR#) or if it has something to do with the hardware (maybe > those are just harmonics from some kind of square signal, i.e clock). I > am worried because they are extremely strong and because of this I could > have trouble detecting weaker signals nearby. > > Summarising, my questions are: > > - What causes those peaks? > - Is it necessary to remove them for a proper signal detection? > > Thanks in advance, > > Marc.
You haven't indicated what hardware you used or the sampling rate. Try reducing the sampling rate - the sampling rate used may be unstable. > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
