In analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the instantaneous frequency deviation, i.e.
The technology is used in telecommunications, radio broadcasting, signal processing, and computing. With a million-volt electric arc as a source of interference behind it, the AM receiver produced only a roar of static, while the FM receiver clearly reproduced a music program from Armstrong's experimental FM transmitter W2XMN in New Jersey.įrequency modulation ( FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
FM has better noise ( RFI) rejection than AM, as shown in this dramatic New York publicity demonstration by General Electric in 1940.
0 kommentar(er)
