Radio: Difference between revisions
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imported>Howard C. Berkowitz (New page: {{subpages}} '''Radio''' covers a variety of technologies by which information is imposed on electromagnetic radiation traveling without wires, through air or space. Modulation...) |
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Revision as of 12:30, 25 May 2008
Radio covers a variety of technologies by which information is imposed on electromagnetic radiation traveling without wires, through air or space. Modulation describes the set of processes of imposing the information on the unmodified carrier wave.
The frequency of the carrier wave is usually associated with a frequency band. The information may be voice, data, imagery or instrumentation signals such as radar