Re: [Discuss-gnuradio] RDS

[Jan Schiefer]

Great pointer! Here is the posting: 
http://www.archivum.info/address@hidden/2006-02/msg00018.html
This would be great to build on.

Cheers,
   Jan

Matt Ettus wrote:
> I seem to recall someone writing a gr-rds module a while ago.  You might
> check the mailing list archives.  I would love to have this feature in
> gnuradio.  Please let me know if you need any help.
>
> Matt
>
>
> Jan Schiefer wrote:
>   
> > Hi Erlend,
> >
> > I think you should be able to see the subcarrier with the USRP. The
> > injection level of the RDS signal is typically around 1.5 to 2%, this
> > is substantially less than the pilot, which is typically around 9%,
> > but it should still be visible. Make sure you have a good signal
> > without too much multipath. Also, you want to double-check whether the
> > station you are looking at is indeed carrying RDS (not sure whether
> > everybody does in Norway).
> >
> > If you end up writing a decoder, please drop me a line. The American
> > version of RDS, called RBDS, is (of course) slightly different. I'd be
> > interested in helping to making sure that it will work on both sides
> > of the Atlantic.
> >
> > Cheers,
> >    Jan
> >
> >
> > Erlend Barstad Strand wrote:
> >     
> > > Hi
> > >
> > > I am trying to extend the usrp_wfm_rcv_pll.py by reading the RDS
> > > subcarrier, however I have a problem observing the subcarrier at all. I
> > > have connected a file_sink to the fm_demod in order to see the spectrum
> > > in Matlab. In the spectrum I can observe the L+R, L-R and pilot tone,
> > > but no RDS subcarrier at 57kHz.
> > >
> > > Have anyone successfully seen this channel on broadcast FM?
> > >
> > > Is it possible that the RDS subcarrier doesnt have enough power to be
> > > oberved with the USRP board?
> > >
> > > best regards
> > > erlend
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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> >
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