作者: Travis Halky , Steven E. Nielsen , Ronald Totten
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摘要: An RF hardline coaxial cable plant to facilitate voice and/or data services subscriber premises in one or more neighborhood nodes of a communication system by conveying upstream information over an path bandwidth. One radio frequency (RF) signals have carrier between approximately 5 MHz and 19.6 are modulated using quadrature amplitude modulation (QAM) with constituting at least some the information. example signal defines channel having average power, highest value for noise power bandwidth given node, as measured 24 hour period, is 25 decibels (dB) below less than 20 above floor associated node.