Relative transmission level
telecommunication, relative transmission level is the ratio of the signal power, at a given point in a transmission system, to a reference signal power.
ratiois usually determined by applying a standard test toneat zero transmission level point(or applying adjusted test tone power at any other point) and measuring the gainor loss to the location of interest. A distinction should be made between the standard test tone power and the expected medianpower of the actual signal required as the basis for the design of transmission systems.
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