This FM Radio that was created with very profound thoughts cause they wanted to please their listeners of various thoughts and taste of music with their programs of various kinds of music. This FM produce lot of interesting music, English Music and local Music with modern songs and great information of Music. Armstrong's first prototype FM broadcast transmitter, located in the Empire State Building, New York City, which he used for secret tests of his system between 1934 and 1935. Licensed as experimental station W2XDG, it transmitted on 41 MHz at a power of 2 kW. Because transmitted FM signals use more bandwidth than AM signals, this form of modulation is commonly used with the higher VHF or UHF frequencies used by TV, the FM broadcast band, and land mobile radio systems.
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Frequency modulation or FM is a form of modulation which conveys information by varying the frequency of a carrier wave; the older amplitude modulation or AM varies the amplitude of the carrier, with its frequency remaining constant. With FM, frequency deviation from the assigned carrier frequency at any instant is directly proportional to the amplitude of the input signal, determining the instantaneous frequency of the transmitted signal. These FM multiplex transmissions began in November 1934 and comprised of the principle station sound program and three sub carriers: a fax program, a synchronizing signal for the fax program and a broadcast "arrange" channel. These unique FM multiplex sub carriers were adequacy regulated.