Re: [Discuss-gnuradio] Live fm detection gr-inspector

[Sebastian Müller]

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
address@hidden
PGP ID DC2AA3EE

Am 13. Juni 2019 um 19:10:59, Daniel Andres Palacios
(address@hidden) 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
> > > address@hidden
> > > 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*
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