Thanks for the advice Sreeraj, but would a sampling rate mismatch stop the
flow graph  from executing at all?

If In the same flow graph I substitute the RTL-SDR by the UHD USRP Source
using the N210, the flow graph executes properly.

Joe


On Mon, May 6, 2013 at 8:58 AM, Marcus D. Leech <[email protected]> wrote:

> Indeed Marcus, I ll give the script a go as a last resort,  i m curious to
>> find out what causing it. To troubleshoot it I upgraded the working one on
>> 3.6.2 running on ubuntu 11.4 to 3.6.4.1, and guess what I m facing the same
>> issue reported initialy , it looks like it is related to the gnuradio
>> version !
>>
>>  Well, I looked at your .grc file, and it has some problems.
>
> Since the input rate isn't evenly divisible by the output rate (44.1kHz),
> your decimations aren't going to work very well, since they don't
>   work out evenly.   It may sort of stagger through on some versions and
> not others.
>
> You might want to use any of the resampler blocks--like the fractional
> interpolator, to make certain that samples are being delivered
>   at the correct rates.
>
>
>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
>
>
>
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