Hi Everyone, I've been working with Thomas Schmid's old 802.1.54 demodulation code. I've got it running well on the original USRP and have been trying to get the code to work with the USRP2. I basically just changed out the source block and yet could not properly demodulate a packet.
To investigate I used gr-utils/src/python/usrp2_rx_cfile.py to capture incoming data and then plotted it using gr_plot_fft.py. I noticed 2 things: 1. The first block of data read by the plotter seems to always display a strange dead signal, but all the other blocks have some In-phase data. 2. More importantly, I am not seeing any quadrature component in the IQ-plot (besides the noise at the beginning). I compared this to data from the USRP using usrp_rx_cfile.py and gr_plot_fft.py and am able to see IQ data. Is there a reason for this? A hardware issue? or a Setup issue? I am using the SVN revision 10306. I've posted the plots here: http://www.cs.ucla.edu/~septikus/usrp.html Thanks for any help you can provide! -Leslie _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
