I just noticed something else: The USRP sample rate is set to 500kHz, not 20MHz. So you are only looking at 2.5 % of the target spectrum! It is also possible, that there are just no signals in that particular section.
Best, Sebastian Müller gse...@gmail.com PGP ID DC2AA3EE Am 13. Juni 2019 um 20:20:24, Sebastian Müller (gse...@gmail.com) schrieb: > Hi Daniel, > > from what you tell us, I conclude this is not an issue with gr-inspector but > rather with > generally receiving signals. > If you use the QT GUI Sink for instance instead, you will see the same > (empty) spectrum. > I would recommend to try and get better reception, until you can distinguish > signals > visually in the spectrum manually. Are you using the correct antenna for this > frequency > range? Is this antenna positioned in a beneficial location for reception? > Have you played > around with the Rx gain of the USRP? > > Best, > > Sebastian Müller > gse...@gmail.com > PGP ID DC2AA3EE > > Am 13. Juni 2019 um 19:10:59, Daniel Andres Palacios (dapa...@gmail.com) > schrieb: > > Thanks for your reply > > > > I trying to detect and classify all fm transmitted stations in my country, > > with the gr-inspector OOT. > > In my country (Colombia) it goes from 87,9 to 107.9 MHZ. > > I only have an USRP B200 and think that if I set the center frequency at 98 > > MHZ and put a bandwidth of 20MHZ its posible to get my goal. But actually > > im not getting signals detected > > [image: Captura de pantalla de 2019-06-13 11-17-05.png] > > > > On Tue, Jun 11, 2019 at 12:53 PM Müller, Marcus (CEL) > > wrote: > > > > > Hi Daniel, > > > > > > please remember to be specific when asking a question: "best way" is a > > > bit ambiguous, and "I'm not getting a good result" definitely is > > > insufficient for us to help you make things work better. What doesn't > > > work sufficiently well? What happens instead? > > > > > > Best regards, > > > Marcus > > > > > > On Tue, 2019-06-11 at 12:36 -0500, Daniel Andres Palacios wrote: > > > > Hi to everyone. > > > > > > > > What is the best way to receive all fm modifications. I'm usigin an B200 > > > USRP. > > > > I think that putting the center frequency at 98M and a bandwidth of 20M > > > is a good way,but I'm not getting a good result. > > > > > > > > The idea is to detect all fm center frequencies using gr-inspector > > > > _______________________________________________ > > > > Discuss-gnuradio mailing list > > > > Discuss-gnuradio@gnu.org > > > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > > > > -- > > *Daniel Andrés Palacios Carabalí* > > *Student of Telemathics engineering* > > *Icesi University- Cali, Colombia* > > *===========================* > > *Estudiante de Ingeniería Telemática* > > *Universidad Icesi. - Cali, Colombia* > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
