On Mon, Jan 11, 2010 at 08:58:16AM -0800, Thomas wrote: > Hi, > I'm working on a project that requires using two receivers tuned the > same frequency simultaneously. Ideally, I would use identical > receivers, but I am using a TVRX card and a DBSRX card becuase those > are what I have available.
> I'm curious why the spectra of signals received with the TVRX seem > to be more spread out than with the DBSRX. An example is shown in > the link below. The upper plot is from the TVRX, and the lower plot > is from the DBSRX. This signal happens to be an ATSC carrier. Both > daughtercards are tuned the same frequency, and the FFT parameters > and so forth are identical. > http://img23.imageshack.us/img23/3206/screenshotusrpfft2.png > Does anyone know what causes this apparent spreading and if there is > anything I can do about it? > I purposely left out details of my configuration to keep this > message short, but feel free to ask for more information if this > isn't enough to answer my question. > Thank you, > Thomas Try setting the gains differently on the two boards. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
