2011/12/4 Nakajo Tomoyuki <nak...@fukui-ut.ac.jp> > Dear all, > > I try to use uhd_fft.py. > > The viewing area is displayed, but, no waveform is displayed on viewing > area. > Please tell me how to manage the trouble. > > A result of uhd_fft.py is below, > > -------------------------------------------------------------------- > jupiter@jupiter-Prime-Series:/usr/local/bin$ ./uhd_fft.py -a > "addr=192.168.10.2" > linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.004.000-07c9d41 > > -- Opening a USRP2/N-Series device... > -- Current recv frame size: 1472 bytes > -- Current send frame size: 1472 bytes > > UHD Warning: > Unable to set the thread priority. Performance may be negatively affected. > Please see the general application notes in the manual for instructions. > EnvironmentError: OSError: error in pthread_setschedparam > -------------------------------------------------------------------
You are probably receiving a signal too small to be displayed in the default area of the FFT plot. Try setting the the ref level and dB/step or scroll (using a mouse wheel) down to see where the signal is. Tom
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