MODULATOR AND DEMODULATOR FOR PASSIVE OPTICAL NETWORK

摘要

A system and method for carrying a return path signal from a cable system set top box (64) to a cable television head end via a passive optical network (12). The return path signal is received by a demodulator (110) for demodulating and decoding the signal. A digit representation of the return path signal is carried over the passive optical network (12) to an optical terminal unit (42) operative in conjunction with a modulator (116) for producing a radio frequency signal in response thereto for transmittal to the cable television head end.