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fDesc[0] = "PSK31 is an amateur radio communications mode , that uses phase modulation and special character coding. <br /> The 31 baud BPSK modulation system used in PSK31 was introduced by SP9VRC in his SLOWBPSK. Instead of the traditional frequency-shift keying, the information is transmitted by patterns of polarity-reversals (sometimes called 180-degree phase shifts).";

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