Re: [Discuss-gnuradio] gr-rds

[Andreas Ladanyi]

Hi Michael,

i read your mail and i could remember i had a similar problem with a lot 
of lost sync and bad block messages.

My solution was to use a different RTL USB stick and to play with 
antenna type / antenna position and the gain of the RTL stick.

I used a "classical" lamda / 2 dipol UKW Radio antenna. The stick was a 
noname.

regards,
Andreas






Am 23.08.2015 um 20:02 schrieb Michael Thelen DK4MT:
> Hi Marcus,
>
> thanks, tried your script and found out, that it is always a little bit
> uncomely if something is not really reproducible. This is the status:
>
> With your script I did not get the earlier error anymore. However with
> my original I did not get it either. Instead I get the following message
> in GRC:
> @@@@@ Sync State Detected
> @@@@@ Lost Sync (Got 50 bad blocks on 50 total)
>
> I do not get this message if I run your script. Both scripts though do
> not show RDS information. So before I steal somebody's time I wonder if
> one reason could be, that I can only receive one station really at the
> limit and only if I set gain to a max. I can hear fairly clear audio,
> but I am not sure if I can conclude from, that RDS decoding should work.
> I am pretty much insulated from RF at my place. What would be in favor
> by people being sensitive to EM waves, but for experimenting it is
> pretty bad.
>
> So I might gonna check this outside, where I can see in my car, that RDS
> reception is working on my radio and then I can compare. Just want to
> make sure we or you aren't chasing an error which might be based on poor
> reception.
>
> However the messages in the terminal have been there last time and the I
> copied to also were there. Still don't no if this is part of the problem
> though. Therefore probably more testing on my side.
>
> Best regards,
> Mike
>
>
>
> > Hi Mike,
> >
> > dashed only means "message port connection" rather than "item stream",
> > so that's nothing to worry about, usually.
> > So the bad news is that this is possible a GRC bug, which on the other
> > hand is good news, because it means that gr-rds isn't broken, GRC just
> > has a hard time correctly generating the python file.
> > Since that worked for me: can you try the attached python file?
> >
> > Best regards,
> > Marcus
> >
> > On 22.08.2015 11:26, Michael Thelen DK4MT wrote:
> > > Hi,
> > >
> > > I am using GNU Radio 3.7.7.2 and I checked out out and built gr-rds.
> > > However RDS Decoding is not working. I found that there are to two
> > > connections have dashed lines (see picture). And in the terminal all I
> > > get is Error: Cannot create connection. But I could not find a hint,
> > > what is going wrong. Can somebody tell me, what to check for?
> > >
> > > Best regards,
> > > Mike
> > >
> > >
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