On Tue, Oct 09, 2007 at 05:11:52PM -0400, [EMAIL PROTECTED] wrote: > Thanks- > > I just downloaded, compiled and installed this latest revision. When I > test multi_scope.py in the mutli-antenna examples directory with this > release I get the same issue. Please note, I have the LF_RX > daughterboards, so I change the daughterboard ID from BASIC to LF in the > python code. I also eliminate the second factor of 4 decimation in the > host (sw_decim = 4) by setting it to 1. I then run with the following > command: > > multi-antenna]$ ./multi_scope.py -f0 -d250 -g0 > > while acquiring a 10 kHz 0.3 V p-p signal. The max value shown in the > waveform on the gui is just over 25,000, which is way too much compared to > the standard usrp_fft.py, which by the way is no longer in the examples > directory; I used one from a previous release. If I increase the input > voltage level to 0.4 V p-p, I get a jagged waveform with sharp > discontinuities. > > So, my problem remains. Any ideas?
What's your test signal? Is it your 100kHz wide signal? Can you try it with -d 400 as described below? Eric > On Tue, 9 Oct 2007, Eric Blossom wrote: > > >With the halfbands, it's flat to about 70% of the passband. > >decim = 320 gives 200kS/s complex baseband, a bit more than you'll > >need. > > > > > >Without the halfbands, I'd use about 4x the bandwidth of interest, > >then filter and decimate in the host for the final channel selection. > >In your case, I'd use decim = 160 giving 400kS/s. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
