| 摘要 |
Communication between an upstream point, such as a TV-source headend (HE1) followed by a fiber optic line (FF1), and a number of downstream points, such as coaxial cable connected subscriber locations (SU1, SU2 -- SUN), is achieved by wavelength or frequency demultiplexing a spectrum of downstream radio-frequency signals with a surface-acoustic- wave (SAW) demultiplexer-multiplexer (in RO1) and distributing the demultiplexed signals to the downstream points, for example through the cables (CO1, CO2 -- CON). <IMAGE> |
