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The usage of frequencies within the United States is regulated by the Federal Communications Commission (FCC). When distributing initial spectrum licenses in a band the FCC divides the US geographically into a number of areas. [1] A mobile operator (or other interested party) must bid on each area individually.
Military aircraft also use a dedicated UHF-AM band from 225.0 to 399.95 MHz for air-to-air and air-to-ground, including air traffic control communication. This band has a designated emergency and guard channel of 243.0 MHz. [2] [8] Radio aeronautical navigation aids use other frequencies. Non-directional beacons (NDB)s operate on low frequency ...
The following chart lists frequencies on the broadcast company band, and which classes broadcast on these frequencies; Class A and Class B, 10,000 watt and higher (full-time) stations in North America which broadcast on clear-channel station frequencies are also shown.
US frequency allocations chart, 2016. Frequency allocation (or spectrum allocation) is the part of spectrum management dealing with the designation and regulation of the electromagnetic spectrum into frequency bands, normally done by governments in most countries. [1]
In the United States, radio frequencies made available by the Federal Communications Commission for use as UNICOM are: [8] Airports with an Air Traffic Control tower or FSS (Alaska only) on the airport. [8] 122.950 MHz; Airports without an Air Traffic Control tower or FSS on the airport. [8] 122.700 MHz; 122.725 MHz; 122.800 MHz; 122.975 MHz ...
Two separate frequency bands have been allocated by the FCC for air-ground telephone service. One at 454/459 MHz, was originally reserved for "general" aviation use (non-airliners) and the 800 MHz range, primarily used for airliner telephone service, which has shown limited acceptance by passengers.
In the Americas (defined as International Telecommunication Union (ITU) region 2), the FM broadcast band consists of 101 channels, each 200 kHz wide, in the frequency range from 87.8 to 108.0 MHz, with "center frequencies" running from 87.9 MHz to 107.9 MHz. For most purposes an FM station is associated with its center frequency.
Review of the 88 Expanded Band authorizations made by the Federal Communications Commission on March 17, 1997. [5] In the table below: For the "Original Standard Band Assignment" entries, the FCC's March 17, 1997 notification listed station's call signs and frequencies as of June 30, 1993, dating to when the stations initially notified the commission that they were interested in participating.