Re: [Discuss-gnuradio] question about overruns with simple flowgraph

[Marcus D. Leech]

On 08/06/2013 09:07 PM, Stephen wrote:
> > I tend to use the fractional interpolator--you can get exact rate
> > matching that way.  It doesn't seem that expensive, particularly when I
> > use it at the
> >    "low speed" part of the graph near the audio subsystem.
> I tried that and it worked. But it adds a small amount of hiss. I also
> tried the fractional resampler. It added a lot of hiss and a high pitch
> whine. The polyphase arbitrary resampler added a more hiss than the
> fractional interpolator but less than the fractional resampler.
>
> stephen
If you're downsampling, you do need to make certain that the bandwidth 
of your incoming signal (regardless of its rate) is appropriate for
  the final bandwidth after the resampler.



--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org