Eric, If we start usrp_siggen.py, for instance, and set -f 0 (zero) or no frequency at all, what blocks gets activated?
Angilberto. --- Eric Blossom <[EMAIL PROTECTED]> wrote: > On Wed, Aug 30, 2006 at 01:28:33PM -0400, Lee Patton > wrote: > > On Wed, 2006-08-30 at 06:56 +0000, Eric Blossom > wrote: > > > On Tue, Aug 29, 2006 at 10:08:47PM -0400, Lee > Patton wrote: > > > > I've taken a shot at coming up with block > diagrams for the USRP and > > > > RFX2400. The diagram for the USRP is the > result of information I've > > > > gleaned from different messages in the list, > data sheets, and block > > > > diagrams created by other GNU Radio users > (specifically, Achilleas > > > > Anastasopoulos). The RFX2400 diagram was > created from Matt's drawings > > > > and associated data sheets. > > > > > > > > The diagrams can be found here: > > > > http://www.pattoncentral.org/gnuradio/diagram/ > > > > > > Nice diagrams! Thanks! > > > > Glad to. > > > > > Here are a couple of tweaks: > > > > > > The digital down-conversion should show a single > complex multiplier > > > instead of two real multipliers. > > > > Thanks. I'll make the change. A complex > multiplier is just a more > > efficient digital version of what I've drawn, > right? > > No. They're not equivalent. The naive complex > multiplier has 4 real > mulitipliers and two adders: > > (a + bj) * (c + dj) = (ac - bd) + (ad + bc)j > > > > Same comment on the digital up-conversion. > We've got "Block D" > > > enabled in the AD9862, thus it's functioning as > a complex multiplier. > > > > Okay. Out of curiosity, is "Block B" enabled too? > > Yes, if it needs to be. > > Eric > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
