UHD_FFT(1) User Commands UHD_FFT(1) NAME uhd_fft - Display spectrum from UHD receiver DESCRIPTION Show received signal spectrum Unable to access the X Display, is $DISPLAY set properly? SEE ALSO uhd_rx_cfile(1) uhd_rx_nogui(1) uhd_siggen(1) uhd_siggen_gui(1) uhd_fft 3.10.12.0 2026-08-16 UHD_FFT(1)