Bruhtesfa Ebrahim wrote: > Eric Blossom wrote: >> On Thu, Feb 12, 2009 at 02:17:05PM -0800, Johnathan Corgan wrote: >>> Actually, what you're now describing is more like not receiving any >>> signal at all--the small line at DC is residual DC offset from the >>> ADC, and the noise is simply that, noise that gets amplified according >>> to the gain setting. At a certain point the noise power exceeds the >>> small DC offset. >>> >>> Johnathan >> >> Agreed about no (or low) signal, though I think the small line at DC >> is a truncation artifact in the FPGA. >> >> Eric >
Hey all, What I understand from a repeated experiment is, only the carrier frequencies which undergo direct downconversion by the daughterboard(frequencies for which DDC=0 in FPGA) show such a behaviour. For instance, for f=5.76GHz there is the problem stated above, but for f=5.7605GHz there is no such a problem. But, why such dependence for the direct down conversion frequencies? I am using the frequencies like, f=5.7605GHz for now.But,will there be any effect on my output due to using these fractional frequencies? Bruhtesfa, -- Posted via http://www.ruby-forum.com/. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
