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Test System For FDM Network Disclosure Number: IPCOM000066329D
Original Publication Date: 1979-Feb-01
Included in the Prior Art Database: 2005-Feb-19

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Abramson, P Deerhake, WJ Irvin, DR [+details]


In two-way frequency division multiplex (FDM) communication systems, it is desirable to have wide-band repeater amplifiers at specified intervals to make up for the attenuation of the cable and other losses in the system. These amplifiers form series strings with up to 8 to 10 amplifiers in series. Since this is a two-way system, at each physical amplifier location, there are two amplifiers, one for each direction. These amplifiers are respectively in the outbound cable and the inbound cable. The amplifiers are generally located remotely from the center of the system, i.e., the "head end" in a CATV network or the host computer in an interactive data transmission system. In many systems these amplifiers may be located in dropped ceilings, and access to the amplifiers is very inconvenient.