From Anritsu Company

The performance of AM and FM broadcast stations is regulated in the United States by the Federal Communications Commission (FCC) and in other countries by their own regulatory bodies. Part 73 of the FCC rules lays out many detailed rules that broadcasters must obey. In those rules there are several classes of stations that are defined primarily by the output power and the antenna configuration of a broadcast station. The performance parameters that must be measured are based, in part, on the class of the station ¨C with the power output of the station being a fundamental determiner of some requirements.

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