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Chapter 3. Coaxial Cable > In-House TV Wiring

3.1. In-House TV Wiring

3.1.1. In-House Wiring Configuration

In a new construction, coaxial cables are connected from a central location near the TV signal source, be it a cable TV or a satellite dish, to every room where an in-house TV wiring connection should be available. This configuration forms a star topology. A multiport splitter is located at the center of the star. Depending upon the number of rooms to be served, some times an amplifier is inserted between the video source and the multiport splitter to raise the signal level, compensating signal losses caused by branch splitting. Assuming that signal separation loss is 15 dB between two output ports of every splitter stage, the minimal signal separation loss is 15 dB between coaxial cable outlets.

For in-house wiring installed by cable TV companies on existing homes, splitters are usually randomly installed at the cable TV entrance point and some other convenient splitting points. This configuration forms a star daisy-chain topology similar to that of the in-house telephone wiring except a splitter is used at every cable branch point. The maximum signal separation loss for the general star daisy-chain follows the same rule of thumb described for the star topology.


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