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Graham M · 18-06-2011, 08:33

QPSK (Quadrature Phase Shift Keying) and QAM (Quadrature Amplitude Modulation) are Modulation methods, IE ways of sending digital signals down the wires over distance whithout the signal degrading too much, IE that it is still recognisable for what it started out as when it reaches the other end of the cable.

18-06-2011, 08:33	#21
Graham M - Join Date: Jul 2003 Location: Poole, Dorset Age: 40 Services: FreeSat+ Tivo V-Box VM 60MBit Posts: 13,365	Re: VM Man with Leakage Aerial QPSK (Quadrature Phase Shift Keying) and QAM (Quadrature Amplitude Modulation) are Modulation methods, IE ways of sending digital signals down the wires over distance whithout the signal degrading too much, IE that it is still recognisable for what it started out as when it reaches the other end of the cable.