Are you saying that if you feed the same 1MHz wide AWGN noise source (at -100dBm) to the input at the time you run rx_samples_to_file that you cannot see your source because it is below the noise level?
On Tue, Aug 11, 2020 at 8:21 AM Jon Beniston via USRP-users < [email protected]> wrote: > Hi, > > At 436MHz with a gain setting of 76dB, NF of 5dB, BW of 2MHz, I expect the > noise floor of the B210 to be around -174+5+10*log10(2e6)=-105dBm > > When I run the SDR Console software, this is what it appears to be. If I > feed in a 1MHz wide AWGN noise source at -100dBm, it can be seen 5dB about > the floor. > > However, when I try to capture the same data using the MatLab USRP > interface > or the rx_samples_to_file program (with same gain and sample rate), the > noise floor seems to be at around -90dBm. > > (E.g: rx_samples_to_file.exe --duration 1 --rate 2000000 --freq 436e6 > --gain > 76) > > Any idea why this might be? Possibly something silly, but I can't seem to > figure out what. > > Thanks, > Jon > > > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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