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Markus, John Formerly, Consultant, Sunnyvale, California.
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A television broadcast, involving the transmission of the picture and sound portions of the program by separate transmitters at assigned carrier frequencies within the channel assigned to a television station. A telecast is intended for reception by the general public, just as is a radio broadcast. The picture may be either in black and white or in full color, using amplitude modulation, while the sound portion (in the United States) uses frequency modulation. The channels assigned for telecasts by the Federal Communications Commission, each 6 megahertz (MHz) wide, cover frequencies as follows: 54−72 MHz (channels 2 through 4), 76−88 MHz (channels 5 and 6), 174−216 MHz (channels 7 through 13), and 470−890 MHz (channels 14 through 83). See also: Radio spectrum allocation; Television; Television networks; Television receiver; Television standards; Television transmitter
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