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? Regards, Tarun Mani Tiwari MSEE student, Multimedia Comm Lab, UT Dallas On 10/11/07, Martin Dvh <[EMAIL PROTECTED]> wrote: > > [EMAIL PROTECTED] wrote: > > I'm sure you are right about the gui taking the majority of the cycles, > > but it's the real-time feedback that makes gnuradio so attractive. > > Ideally one would beable to switch them on and off as needed during > > operation of the program, which it is my understanding will be possible > > with the implementation of mblocks. > > > > As things stand now, is there a "refresh rate" control that I can > > modify, so that the scope sinks use less cycles? > Yes, you can set the following parameters. > sink param default less cycles Function > oscope frame_decim 1 >1 keep one block in > every "frame_decim" > fft fft_rate 15.0 <15.0 refresh rate of > fft_display > > so for less GUI cycles set frame_decim to 10 or even 100 > set fft_rate to 5.0 or even 1.0 > > I wished that fft_rate was set to 5.0 default because allmost allways 15.0is > too much a load on my machines. > > Greetings, > Martin > > > > thanks, > > eric > > > > On Wed, 10 Oct 2007, Eric Blossom wrote: > > > >> On Wed, Oct 10, 2007 at 06:07:04PM -0400, [EMAIL PROTECTED] wrote: > >>> Ok, that works in principle, but I'm finding that I cannot sustain the > >>> same data rate as before on a fast dual core machine. > >>> > >>> I'm acquiring all 4 channels, and I'm doing both low-pass and > high-pass > >>> filtering on all of them. I am also displaying 5 sinks > >>> simultaneously; 1 > >>> fft and 4 scopes. > >> > >> You'll most likely find that the bulk of your cycles are spent in the > >> gui. Try disabling it. > >> > >>> So, in the long term it would help to have this sorted out in the > >>> fpga if > >>> that's possible; is that impossible as things stand now, or is there > >>> sufficient space in the 4rx no hb fpga? > >> > >> IIRC, the std_4rx_0tx.rbf configuration uses about 86% of the FPGA. > >> > >> Eric > >> > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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