PSK31 is one of the hottest new digital modes. It is a keyboard to keyboard mode of operation which is much narrower in bandwidth than most digital modes and in fact uses little more spectrum than a CW signal. The following displays reflect the spectrum display of properly transmitted signals.
BPSK Bandwidth Of Properly Transmitted Signal
QPSK Bandwidth Of Properly Transmitted Signal
FFT-Spectrum versus time, frequency and signal intensity
FFT-Spectrum versus frequency and signal intensity
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