On Wed, Apr 18, 2007 at 01:49:36PM +0200, Anmar wrote: > Eric Blossom wrote: > > > If you have two daughterboards you can send two independent signals. > yes, I have two daughterboards(Basic TX). I can now send two independent > signals from the two daugterboards, but the two signals have the same > phase. > > > > > If you start fresh from USRP power-up you can control the phase > > between the transmitted signals (this also depends on the > > daugherboards that you are using and how they are configured.) > > How can I control the phase on power-up?
IIRC, they come up with the same phase. > The > > power-up requirement is because from software we have no way to > > control the phase accumulator in the AD9862 digital up converter, > > however at power-up it has a constant value. > > But if the two signals come out of the FPGA with different phase, > because each one of the signals will go to different AD9862. I would > think that the phase should be controlled from the FPGA and the AD9862 > will have nothing to do with the phase, probably not :). You can control the phase in the FPGA. However, we're using the digital upconverter in the AD9862. That DUC has its own phase register. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
