On Mon, Jan 26, 2009 at 09:03:32PM -0800, Johnathan Corgan wrote: > On Sun, Jan 25, 2009 at 9:21 PM, Kimminau Jr., Leo F. <[email protected]> wrote: > > > Using a PowerMac G5 to control the USRP, if I stop usrp_siggen.py, the USRP > > continues to transmit. Is this expected? > > No. > > > This behavior is different than on a PowerBook G4, where the USRP stops > > transmitting when usrp_siggen.py is stopped. > > Can you elaborate on any other differences between the configurations? > OS version, GNU Radio version, developer tools (GCC, swig, Python), > etc.? > > Thanks > > -Johnathan
I think this is a known problem (not sure there's a ticket on it). I believe that what is happening is that on the faster machine, the Tx pipeline in the FPGA is getting disabled before it has a chance to drain. The result of this is that the pipeline is halted with a non-zero constant value getting clocked into the DACs resulting in a carrier for all daughterboards that contain an LO. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
