Patent ID: 9635309
Date: 2017-04-25
CPC Classifications: H04H,H04L,H04N

Claim:
1. A method for receiving data downstream from a head end at a node through a fiber optic network, said method comprising: (a) receiving at the node a series of digital codewords each representing an instantaneous power level of a radio frequency (RF) spectrum based on a headend conversion clock, wherein the RF spectrum is a composite RF spectrum input to a head end transmitter that includes a combination of CATV content having respective frequency bands within the RF spectrum, wherein each digital codeword represents the instantaneous power level of the composite RF spectrum at intervals of the headend conversion clock; (b) recovering a clock rate, used by the headend conversion clock to generate the codewords, for use by a node conversion clock; (c) determining the respective power levels of the RF spectrum from each of the received digital codewords for converting the series of digital codewords in to one or more analog signals representing the composite RF spectrum of the combined cable television (CATV) content, the conversion of digital code words performed via the node conversion clock and a digital to analog converter (DAC) located in the node remote from the head end; (d) preparing one or more analog signals representing the composite RF spectrum for distribution over a coaxial network; and (e) propagating the one or more analog signals to one or more users over the coaxial network.