To see how the system operates, it is easier to refer to a diagram. In Figure 3-22 ... Another form of modulation that is being used more frequently is Orthogonal Frequency Division Multiplex (OFDM).

Wired transmission to the home is mostly by coaxial cable, using quadrature amplitude modulation (QAM), or by twisted pair, using OFDM over DSL. Physical media, i.e., DVD or Blu-ray, use an optical ...