Subsidiary communications authority

（重定向自FM subcarrier）

Subsidiary Communications Authorization (SCA) in the United States, and Subsidiary Communications Multiplex Operation (SCMO) in Canada, is a subcarrier on a radio station, allowing the station to broadcast additional services as part of its signal.

单词	FM subcarrier
释义	FM subcarrier 英语百科 Subsidiary communications authority （重定向自FM subcarrier） Subsidiary Communications Authorization (SCA) in the United States, and Subsidiary Communications Multiplex Operation (SCMO) in Canada, is a subcarrier on a radio station, allowing the station to broadcast additional services as part of its signal.
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