Control Of Remote Hubs In Addressable CATV Systems (1985)

By Andrew E. Hospador, General Instrument Corroration

The application of CATV systems in an urban environment encompassing large geographical areas, large numbers of subscribers and varying clusters of ethnic/demographic groups requires the distribution of signals from local hubs. Operation of these hubs can be controlled from an addressable computer at a remote location using digital communications techniques (protocols).

This paper discusses the control of remote hubs in addressable CATV systems. It examines both continuous and discontinuous communications, emphasizing a distributed intelligence approach.

Both one-way and two-way communications and the use of non-CATV cable signal paths are discussed. Also explored are the interface requirements for the converters, scramblers and data modulators being controlled. In addition, frequency agility techniques are described.

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