On Thu, Oct 11, 2007 at 02:11:38PM -0500, Tarun Tiwari wrote: > Hi, > Thanks everybody, this thread helped me a lot to understand the multi > antenna cabability of gnuradio. > I tried to run the multi_scope.py on a cingle USRP having two rfx2400 > daughterboards with following changes in current multi_scope.py: > > 1) On line 44: nchan changed to 2 from 4 > 2) On Line 67: "len(self.subdev) != 4)" changed to "len(self.subdev) != 2)" > 3) On line 68 and 69: usrp_dbid.BASIC_RX changed to > usrp_dbid.FLEX_2400_RX_MIMO_B > > I generate sinusoid of 2.43G on a different machine/gnuradio and then run > the command ./multi_scope.py -f2.43G -d128 -g0 on another machine with above > changes, but i dont see anything other than noise on my scope. I tried > different rbf files std_2rxhb_2tx.rbf, multi_2rxhb_2tx.rbf and got nothing, > but the noise. > > Next I changed the fpga_filename to multi_4rx_0tx.rbf, but i got following > error: > Can't find fpga bitstream: multi_4rx_0tx.rbf > and program stoped with runtime error of "Can't open USRP" > > Any suggestion?
If you're using only two channels, stick with the default rbf "std_2rxhb_2tx.rbf". The RFX boards are quadrature. The Rx mux setting should be: self.u.set_mux(gru.hexint(0x00003210)) Not self.u.set_mux(gru.hexint(0xf3f2f1f0)) Try turning the gain up. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
