R820T and Gnuradio

Steve Markgraf steve at steve-m.de
Thu Nov 15 20:47:16 UTC 2012


On 15.11.2012 21:11, Ron Senykoff wrote:
> I have gnuradio running with the R820D DVB. Latest GQRX has the nice rf
> gain inside which REALLY helps. Has this been merged over to gr-osmosdr
> ? I recompiled probably just a few days, both from source.

gqrx uses gr-osmosdr as source block, so it's identical.

> I'm trying to figure out how to set gain from within gnuradio (is there
> a argument I can pass the device in the source block?).

Yes, the 'Gain' argument.

> Also using the OSMOSDR block I still see an LO like spike right in the
> middle.

gqrx uses an internal DC offset correction algorithm, which you'd need
to implement in your flowgraph as well if you want to remove the


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