On Fri, Sep 22, 2006 at 05:38:54PM -0400, Mark Sullivan wrote: > When I inject a signal at a -45 dBm level on the "RX-B" sma connector on a > Basic RX daughtercard, I see a copy of the signal on the "RX-A" side when I > use usrp_fft.py. The level is 10-20 dB below that of what I see if I move > the signal from "RX-B" to "RX-A," but this seems like too much coupling. > Using a 50 ohm termination on the unconnected sma connector helps a little > bit. I see no copy of the signal from either input of the other Basic RX > daughtercard. Any thoghts, anyone? > > Best regards, > > Mark Sullivan
Hi Mark, There's a chance that the code that determines the rx digital mux setting isn't handling this case properly. Assuming that the Basic Rx is on the "A" side, please try this: $ usrp_fft.py -R a:0 -f <freq> and try moving the test signal from RX-A to RX-B and this: $ usrp-fft.py -R a:1 -f <freq> and move the test signal from RX-A to RX-B What happens? Thanks, Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
