On Thu, Nov 09, 2006 at 09:56:37PM -0800, Dan Halperin wrote: > Hi, > > A second question is: With the basic boards as described earlier, I > run [usrp_fft.py -f 1M -d 32] and then run the signal generator > [usrp_siggen.py -f 1M -i 32]. The spectrum I see has a small peak > (but, at 0db) centered at 0 and then a large peak >50db near +0.1MHz. > What is going on here?
Try usrp_siggen.py --help You specified the RF center frequency, but took the default for the signal generated at baseband (the -w <freq>). By default it's 100kHz, thus the peak near +0.1 MHz. Admittedly this is a somewhat unusual interface for somebody who may just want a sine wave out. On the other hand, this code originally existed to allow us to confirm that the system was working the way we expected it behind the scenes. I just checked in an update to usrp_siggen.py that now has the --help list the default values for additional properties. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
