Ann ka note colore - N-X-T


Sheet3 Sheet2 Item List as of March 5, 2010 10'' x 15'' Printer Stand Particle Brd 20'' 28'' 30 Lt. Gray Tall/ 1 Shelf 1 Cabinet Binder, Poly Fiber Clear/Blue

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In radio and telecommunications, the frequency spectrum can be shared among many different broadcasters. The radio spectrum is the part of the electromagnetic spectrum corresponding to frequencies lower below 300 GHz, which corresponds to wavelengths longer than about 1 mm. The microwave spectrum corresponds to frequencies between 300 MHz (  GHz ) and 300 GHz and wavelengths between one meter and one millimeter. [5] [6] Each broadcast radio and TV station transmits a wave on an assigned frequency range, called a channel . When many broadcasters are present, the radio spectrum consists of the sum of all the individual channels, each carrying separate information, spread across a wide frequency spectrum. Any particular radio receiver will detect a single function of amplitude (voltage) vs. time. The radio then uses a tuned circuit or tuner to select a single channel or frequency band and demodulate or decode the information from that broadcaster. If we made a graph of the strength of each channel vs. the frequency of the tuner, it would be the frequency spectrum of the antenna signal.




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