This Recommendation provides data transmission systems using phase-shift keying (PSK) and quadrature
amplitude modulation (QAM) over HF channels. Information is contained in Annex 6 for data rates from
3 200 to 12 800 bit/s.
ITU-R F.763-5-2005 history
2005ITU-R F.763-5-2005 Data Transmission over HF Circuits Using Phase Shift Keying or Quadrature Amplitude Modulation