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FM radio channel assignments in the U.S. In the United States, FM broadcasting stations operate on a 20.2 MHz-wide frequency band, spanning from 87.8 MHz to 108 MHz. This is divided into 101 0.2 MHz-wide channels, which are designated as channels 200 through 300. In actual practice, few except the FCC use these channel numbers; the frequencies ...
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.
A period of allowing existing FM stations to broadcast on both the original "low" and new "high" FM bands followed, which ended at midnight on January 8, 1949, at which time all low band transmissions had to end. [17] In 1978 one additional frequency reserved for educational stations, 87.9 MHz, was allocated. [18]
Class B and D stations can be found on any frequencies from 540 kHz to 1700 kHz except where frequencies have been reserved for Class C stations. Class C stations can be found in the lower 48 US states on the frequencies of 1230 kHz, 1240 kHz, 1340 kHz, 1400 kHz, 1450 kHz, and 1490 kHz (commonly known as "graveyard" frequencies).
Low-power FM radio stations in the United States. Low-power FM radio stations (LPFM) started broadcasting in the year 2000 after the FCC began licensing of 100 watt and 10 watt local community radio stations across the United States and its territories. Many LPFM radio stations are on the air serving local areas of the country today.
An LPAM antennain a beer tent. Low-power broadcastingis broadcastingby a broadcast stationat a low transmitter power outputto a smaller service area than "full power" stations within the same region. It is often distinguished from "micropower broadcasting" (more commonly "microbroadcasting") and broadcast translators.
Very low frequency or VLF is the ITU designation [1] for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively. The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers).
87.5 FM is the first useable radio broadcast frequency on the FM radio band spanning between 87.5 and 108 FM or VHF Band 2.The use of 87.5 FM as the main carrier frequency of a legally established and licensed radio station is rare in most countries as it transmits signals slightly off band down to roughly 87.3 and possibly as low as 87.2 FM.