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There are two important factors that affect the maximum length of the cable. One is the data rate for the signal being sent and the other is the cable itself.

A co-ax cable that costs a few cents per foot will normally not have the same performance as one that is a dollar per foot. In general, the larger the diameter of the cable, the lower signal loss it will show for a given distance. All good cables will have a data sheet that sets out the losses for signals of certain frequencies.

Standard definition video needs a far lower data rate than high definition, so when carrying HD content, expect the signal to fail at a shorter distance than SD. As a very. very rough guide, expect SD to cope with several hundred feet of cable. HD may be limited to 100 feet or less for the equivalent cable.

Satellite and cable feeds use higher frequencies than baseband video and so signal loss is more of an issue.

If the cable is to be used as a satellite down feed for example, it is worth calculating the total cable run and asking for advice from a satellite installer. Similarly, many cable companies can offer advice if cable feeds need to be extended.

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14y ago

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