On Sat, Feb 24, 2007 at 05:13:22PM -0500, Brian Padalino wrote: > On 2/24/07, Thibaud Hottelier <[EMAIL PROTECTED]> wrote: > >Hi all, > > > >I have dived into the fpga code and I have now much clearer picture of > >what is going on, but also much more questions :) > > > >The Tx CORDIC is disabled in the code I checked out. Why? > > I could be wrong, but I think the TX CORDIC is disabled due to the > fact that the samples being delivered over USB are already complex. > Any other frequency translation is done within the AD9862 transmit > path. > > Anyone can feel free to correct me if I am wrong.
You are correct ;) > >I have failed to find a description of how to control the AD9862 chip on > >the Analog Device web site. Where is this documented? > > http://www.analog.com/UploadedFiles/Data_Sheets/AD9860_9862.pdf > >I would like to be able to choose the power level and the channel used > >to transmit every packets. To choose the channel, is it possible to > >tweak the CIC Decimating filter to slightly alter the signal frequency > >or is it a better idea to do it in the AD9862? The CIC interpolator doesn't perform freq translation. If you want to change the channel, you'll want to issue the equivalent of a "tune" command (probably several sub-operations inband) immediately prior to sending the samples for the packet. Yes, I know you're waiting for me to flush out the packet format. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
