Mutual Interference Effects In DATA/CATV Systems (1973)

By Charles E. Sampson, Ross Telecommunications

The addition of data channels to CATV systems raises several problems for system designers. Among these are the determination of the best frequency slots and the proper signal levels for the data channels.

From a general intermodulation and distortion analysis this paper presents an evaluation of the mutual interference between data and TV channels. Undesired signal levels are presented for various frequency schemes and as a function of relative signal levels. By coupling this analysis with the susceptibility to interference of TV and data channels, suggestions are made regarding the design of the composite signal spectrum.

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