Hi Firas, yes, it's only somewhat related. I posted a question about the USRP dynamic range a while ago (see link below) but didn't get a response. Maybe you can comment on it.
The algorithm I used to calculate the figure on the Y axis was the sum over an estimate of the power spectrum density. The estimate was calculated by averaging a 5000 FFTs of length 200, if I remember correctly. I then used the same setup to measure the power of other "stationary" but non-white signals in the bandwidth. Best regards, Jens Link: http://lists.gnu.org/archive/html/discuss-gnuradio/2007-09/msg00153.html On Wed, Dec 26, 2007 at 08:36:28AM -0800, Firas A. wrote: > > Hi, > > I think we are trying to do something different. We are trying to > investigate the possibility of increasing USRP dynamic range by modifying > some USRP FPGA stages. > By the way, what was the equation used to calculate the ADC output in dB in > you graph? > > Firas > > > Jens Elsner wrote: > > > > I noticed the discussion about the USRP dynamic range. > > > > A while ago I made some measurements with a noise generator to calibrate > > the USRP with a DBSRX daughterboard. > > > > The resulting graph is attached. > > > > Settings: room temperature, USRP, DBSRX, 2 MHz measurement bandwidth at > > 940 MHz center frequency, cable loss accounted for. > > > > Best regards, > > Jens Elsner > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > -- > View this message in context: > http://www.nabble.com/USRP-dynamic-range---DBSRX-measurements-tp14503069p14503859.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
