 The symbol rate of the new "Coded PHY" is the same as the Base Rate 1M PHY but in mode S=2 there are two symbols transmitted per data bit.In mode S=2 only a simple Pattern Mapping P=1 is used which simply produces the same stuffing bit for each input data bit.In mode S=8 there are eight symbols per data bit with a Pattern Mapping P=4 producing contrasting symbol sequences - a 0 bit is encoded as binary 0011 and a 1 bit is encoded as binary 1100.