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Clear Channel is the largest owner of full-power AM, FM, and shortwave radio stations and twelve radio channels on XM Satellite Radio, and is also the largest pure-play radio station owner and operator. The group was in the television business until it sold all of its TV stations to Newport Television in 2008. The term "clear channel" comes from AM broadcasting, referring to a channel (frequency) on which only one station transmits. In U.S. and Canadian broadcasting history, "clear channel" (or class I-A) stations had exclusive rights to their frequencies throughout most of the continent at night, when AM stations travel very far due to skywave. WOAI in San Antonio, Clear Channel's flagship station, was such a station. |