In North America, terrestrial television is broadcast on designated channels numbered 2 through 69. Except for a few instances, consumer televisions and recorders come with these frequencies pre-programmed in, as opposed to what sometimes occurs in other places around the world. Traditionally, the frequencies are divided into two sections, the very high frequency (VHF) band and the ultra high frequency (UHF) band, but in reality, the VHF band is further subdivided into two more sections, VHF-Lo (band I) and VHF-Hi (band III). In between lies the FM band (band II) used for frequency-modulated radio transmissions and a VHF radio band typically used by civil service agencies and aircraft (often called the airband). World map showing North America A satellite composite image of North America. ... Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... This article is about the radio frequency. ... In most of the world, the FM broadcast band, used for broadcasting FM radio stations, goes from 87. ... Frequency modulation (FM) is a form of modulation which represents information as variations in the instantaneous frequency of a carrier wave. ... A civil servant or public servant is a civilian career public sector employee working for a government department or agency. ... A Japan Airlines Boeing 747-400. ... Note: This article title may be easily confused with AirBand The airband or air band is the band of frequencies used for radio communication in aviation. ...

On many FM radios, the audio for channel 6 can often be picked up by turning the tuner dial all of the way toward the low end, at 87.75. Since there is no guard band, there is a slight overlap between that channel and the low FM band on most receivers. The volume is quite low as the deviation or modulation for TV audio is only ±25 kHz, versus ±75kHz for FM. FM channel 200, centered at 87.9 (87.8 to 88.0), is only used for class D stations forced out of the rest of the FM band by a full-power station, and only if there is no nearby TV 6. The abbreviations FM, Fm, and fm may refer to: Electrical engineering Frequency modulation (FM) and its most common applications: FM broadcasting, used primarily to broadcast music and speech at VHF frequencies FM synthesis, a sound-generation technique popularized by early digital synthesizers Science Femtometre (fm), an SI measure of length... A schematic representation of hearing. ... A tuner is a device to adjust the resonant frequency of an antenna or transmission line to work most efficiently at one frequency or band of frequencies. ... A guard band is a small part of the radio spectrum in between radio bands, for the purpose of preventing interference. ... In radio terminology, a receiver is an electronic device that receives a radio signal from an antenna and decodes the signal for use as sound, pictures, navigational-position information, etc. ... SPL is a three-letter abbreviation with multiple meanings, including: Sound pressure level Scottish Premier League Standard PHP Library Sun Public License SPL_notation Sentence Plan Language - a notation used in Natural_language_processing Senior Patrol Leader SPL_(computer_science) short for Set Priority Level SPL: Sha Po Lang, (殺破狼) a 2005 Hong Kong film. ... In radio, frequency deviation is the result of frequency modulation. ... Modulation is the process of varying a carrier signal, typically a sinusoidal signal, in order to use that signal to convey information. ... The hertz (symbol: Hz) is the SI unit of frequency. ... This is the list of broadcast station classes. ...

Channels 70 through 83 were removed from the bandplan to make way for AMPS cellular telephone service; these channels were mainly used in the U.S., and mainly for translators, some of which continued in operation if their frequencies were not in use for cellular. Channel 37 is allocated to radio astronomy and may not be used by any station. A bandplan or band plan is a plan for utilizing a particular band of radio frequencies, that are a portion of the Electromagnetic spectrum . ... Advanced Mobile Phone System or AMPS is the analog mobile phone system standard, introduced in the Americas during the early 1980s. ... Cellular redirects here. ... In broadcasting, a translator is an FM radio station or a TV station which acts as a full-duplex repeater. ... Microwave image of 3C353 galaxy at 8. ...

Channels 14 through 19 are used for two-way radio in major cities, intended for use on a non-interference basis, although the transition to digital television (DTV) has caused problems in certain instances when a previously unused channel has begun to be used for DTV broadcasts. The same holds true for wireless microphones and medical telemetry devices in that band. A two-way radio is simply a radio that can both transmit and receive (a transceiver). ... Interference of two circular waves - Wavelength (decreasing bottom to top) and Wave centers distance (increasing to the right). ... Digital television (DTV) uses digital modulation and compression to broadcast video, audio and data signals to television sets. ... Wireless is an old-fashioned term for a radio receiver, referring to its use as a wireless telegraph; now the term is used to describe modern wireless connections such as in cellular networks and wireless broadband Internet. ... An Oktava condenser microphone. ... See drugs, medication, and pharmacology for substances that are used to treat patients. ... Telemetry is a technology which allows the remote measurement and reporting of information of interest to the system designer or operator. ... A Device can be taken to mean: an electrical device designed to carry power, but not use it. ...

In many regions, the allocation of new digital TV channels is focused on channels 15 through 50, although some of the more crowded television markets use other channels as available. Through virtual channel numbering, many digital TV stations appear to be on the same channel they used previously. For example, a station that originally broadcast on channel 4 but now has a digital signal available on channel 32 will usually appear as 4-1 or 4.1 on a DTV receiver. Several subchannels can be multiplexed together, so 4-1 through 4-5 might be used by one station. The subchannel numbered as 0 (that is, 4-0) is designated for the analog broadcast. Digital television (DTV) uses digital modulation and compression to broadcast video, audio and data signals to television sets. ... A media market, broadcast market, or simply market is a region where the population can receive the same (or similar) television and radio station offerings, and may also include other types of media including newspapers or Internet content. ... In telecommunications, a virtual channel is a channel designation which differs from the actual radio channel or frequency which the signal travels. ...

Channels 52 through 69 will be removed from television service in the United States when the transition to DTV broadcasting is complete. Some of this radio spectrum has already been auctioned for use in other services, and may be used on a non-interference basis by those licensees. Almost no stations are being assigned to channel 6, although this has not officially been removed from the bandplan. Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. ... An auctioneer and her assistants scan the crowd for bidders An auction is the process of buying and selling things by offering them up for bid, taking bids, and then selling the item to the highest bidder. ... It has been suggested that Licensing (strategic alliance) be merged into this article or section. ...

The VHF bandplan was modified multiple times up until 1948. The last change in that section was the deletion of channel 1, which had originally been intended to be a low-power (less than 1,000 watts) LPTV community channel. Channel 1 was removed early on for amateur radio, now called the six-meter band. Amateur television (ATV) is used on four UHF channels just below 14, especially for repeater output and direct communications. ATV repeater inputs may also be on other channels not near the broadcast bands. 1948 (MCMXLVIII) was a leap year starting on Thursday (the link is to a full 1948 calendar). ... This article is about the non-existent United States TV channel. ... Low-power broadcasting is the concept of broadcasting at very low power and low cost, to a small community area. ... Mrs. ... Amateur television (ATV) is the hobby of transporting broadcast-quality video and audio over radio waves allocated for amateur radio using the broadcast standards of NTSC in North America and Japan, and PAL or SECAM in Europe and elsewhere, using the full refresh rates of those standards. ... For other meanings, see repeater (disambiguation). ...

The FM audio carrier is always 4.5 MHz above the VSB video carrier, and the total channel bandwidth is 6MHz. The lower channel boundary is 1.25MHz lower than the video carrier's center frequency, the upper is 4.75MHz above. (See NTSC for more details.) Analog stations must be separated by at least one channel, except where a gap already exists (such as between channels 4/5, 6/7, and 13/14. Digital channels can operate adjacent channel to any station, which is the only reason so many channels could be removed from service for DTV. A carrier wave, or carrier is a waveform (usually sinusoidal) that is modulated (modified) to represent the information to be transmitted. ... MegaHertz (MHz) is the name given to one million (106) Hertz, a measure of frequency. ... Wikipedia does not yet have an article with this exact name. ... Bandwidth is a measure of frequency range, measured in hertz, of a function of a frequency variable. ... NTSC is the analog television system in use in Korea, Japan, United States, Canada and certain other places, mostly in the Americas (see map). ... In broadcasting an adjacent channel is an AM, FM, or TV channel that is next to another channel. ...

VHF bands

This article is about the non-existent United States TV channel. ...

UHF band

* Channel no longer allocated to broadcast television

See also

• North American cable television frequencies