[Discuss-gnuradio] FW: bladeRF - gr-osmosdr - gqrx - bandwidth?

[Ralph A. Schmid, dk5ras]

> -----Original Message-----
> From: Ralph A. Schmid, dk5ras [mailto:address@hidden
> Sent: Saturday, 14 September, 2013 10:14
> To: 'Sylvain Munaut'
> Cc: 'Alexandru Csete'; 'Brian Padalino'; 'GNURadio Discussion List'
> Subject: RE: [Discuss-gnuradio] bladeRF - gr-osmosdr - gqrx - bandwidth?
> 
> > Probably gqrx or gr-osmosdr treats the gain as a continuous value even
> > though on the LMS it's not, there is only a few discrete value.
> > They should be harmless warnings.
> 
> Yep, just wanted to mention it
> 
> I played a bit more, and I found that checking the iq balance option makes 
> things
> worse, not better. Maybe the real huge center DC peak is too much? Without iq
> balance checked it looks so far OK, much better than without the adjustable
> filter, and the previously mentioned situation around 800 MHz is a bit unfair 
> - I
> found that right below the LTE band there is a strong 785 MHz DVB-T 
> transmitter
> that mixes things up a bit. Outside the GSM 900 and 1800 bands the spurs 
> (spurs?
> Signals almost as fat as the original ones!) seem gone with properly adjusted
> filter.
> 
> Here some screenshots, taken with 10cm of wire directly plugged into the
> bladeRF; sitting on my table :)
> 
> http://dk5ras.dyndns.org/screenshots/
> 
> > Cheers,
> >
> >    Sylvain
> 
> Ralph.