On Sun, Feb 21, 2010 at 1:13 PM, Charles Brain <[email protected]> wrote: > Hello, > > I have been playing around with the USRP2, mainly to get a feeling for how > much data I can pass across the Ethernet. > > I have noticed something odd > > When I use sig_source_c with a sample rate of 20 Ms/s > and a frequency of 1 MHz with the WBX board set to 1 GHz and the > interpolation set to 20 I would have expected the output on the HP 8592L to > be at 1.001 GHz but it is at 1 GHz. I have tried various > combinations of sample rate and frequency and can make > little sense of what is happening. > > When I use the audio sink and use sig_source_f it works exactly how I > expected. > > What am I doing wrong ?
You should definitely be able to see something at 1.001GHz, but any residual DC offset will also cause a spike at 1.000GHz when using a vector modulator. What's your resolution bandwidth set at on your spectrum analyzer? Can you post a link to a screen shot or two? Brian _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
