Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF).
Sutro Tower is a unique three-legged 977 ft (298 m) tall TV and radio lattice tower located in San Francisco, California. Rising from a hill between Twin Peaks and Mount Sutro near Clarendon Heights, it is a prominent feature of the city skyline and a landmark for city residents and visitors. The tower was the tallest structure in San Francisco from the time of its completion in 1973 until it was surpassed by the Salesforce Tower in 2018.
Sweat Mountain is a mountain in far northeastern Cobb County, Georgia, in the suburbs north of Atlanta. The exact GNIS location of its summit is 34°4′1″N84°27′20″W, and it has an official (USGS) elevation of 1,688 ft (515 m) above mean sea level. It is the second-highest point in the county behind Kennesaw Mountain, and second in the core metro Atlanta area, behind Kennesaw Mountain, which is also in Cobb County. It is fifth if the exurban counties further north are considered.
Broadcast engineering or radio engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting. Audio engineering and RF engineering are also essential parts of broadcast engineering, being their own subsets of electrical engineering.
A diplexer is a passive device that implements frequency-domain multiplexing. Two ports are multiplexed onto a third port. The signals on ports L and H occupy disjoint frequency bands. Consequently, the signals on L and H can coexist on port S without interfering with each other.
KREX-TV is a television station in Grand Junction, Colorado, United States, serving as the CBS affiliate for Colorado's Western Slope region. Owned by Nexstar Media Group, it is a sister station to low-power, Class A MyNetworkTV affiliate KGJT-CD, channel 27 ; Nexstar also operates Fox affiliate KFQX under a shared services agreement (SSA) with owner Mission Broadcasting. The three stations share studios on Hillcrest Avenue in Grand Junction, where KREX-TV's transmitter is also located.
A broadcast transmitter is an electronic device which radiates radio waves modulated with information content intended to be received by the general public. Examples are a radio broadcasting transmitter which transmits audio (sound) to broadcast radio receivers (radios) owned by the public, or a television transmitter, which transmits moving images (video) to television receivers (televisions). The term often includes the antenna which radiates the radio waves, and the building and facilities associated with the transmitter. A broadcasting station consists of a broadcast transmitter along with the production studio which originates the broadcasts. Broadcast transmitters must be licensed by governments, and are restricted to specific frequencies and power levels. Each transmitter is assigned a unique identifier consisting of a string of letters and numbers called a callsign, which must be used in all broadcasts.
A television antenna is an antenna specifically designed for use with a television receiver (TV) to receive over-the-air broadcast television signals from a television station. Television reception is dependent upon the antenna as well as the transmitter. Terrestrial television is broadcast on frequencies from about 47 to 250 MHz in the very high frequency (VHF) band, and 470 to 960 MHz in the ultra high frequency (UHF) band in different countries. Television antennas are manufactured in two different types: "indoor" antennas, to be located on top of or next to the television set, and "outdoor" antennas, mounted on a mast on top of the owner's house. They can also be mounted in a loft or attic, where the dry conditions and increased elevation are advantageous for reception and antenna longevity. Outdoor antennas are more expensive and difficult to install but are necessary for adequate reception in fringe areas far from television stations. The most common types of indoor antennas are the dipole and loop antennas, and for outdoor antennas the Yagi, log periodic, and for UHF channels the multi-bay reflective array antenna.
KRBC-TV is a television station in Abilene, Texas, United States, affiliated with NBC. It is owned by Mission Broadcasting, which maintains joint sales and shared services agreements (JSA/SSA) with Nexstar Media Group, owner of dual CBS/Telemundo affiliate KTAB-TV, for the provision of certain services. The two stations share studios on South 14th Street in western Abilene; KRBC-TV's transmitter is located on Texas State Highway 36 in neighboring Callahan County.
A digital channel election was the process by which television stations in the United States chose which physical radio-frequency TV channel they would permanently use after the analog shutdown in 2009. The process was managed and mandated by the Federal Communications Commission for all full-power TV stations. Low-powered television (LPTV) stations are going through a somewhat different process, and are also allowed to flash-cut to digital.
Holston Mountain is a mountain ridge in Upper East Tennessee and southwest Virginia, in the United States. It is in the Blue Ridge Mountains part of the Appalachian Mountains. Holston Mountain is a very prominent ridge-type mountain in Tennessee's Ridge and Valley Region, about 28 miles (45 km) long, running from southwest to northeast, covering about 268 square miles (690 km2). Its highest summit is Holston High Point, on which a Federal Aviation Administration (FAA) aircraft navigational beacon is located, at an elevation of 4,280 feet (1,300 m) above mean sea level. The second and third highest points are Rye Patch Knob, at 4,260 feet (1,300 m) above mean sea level and Rich Knob, at 4,240 above mean sea level respectively. The fourth highest point is Holston High Knob where an old dismantled Cherokee National Forest fire tower marks the elevation at 4,136 feet (1,261 m) above mean sea level.
Sharp's Ridge is a steep ridge in Knoxville, Tennessee, north of the city's downtown. A 111-acre (45 ha) area of the 7-mile (11 km) ridge is maintained as Sharp's Ridge Memorial Park, a city park dedicated to the honor of the area's war veterans. The ridge also is the site of a transmitting antenna farm that serves most of Knoxville's broadcasters. The highest ground point on the ridge is an abandoned fire tower located at 1,391 feet (424 m) above mean sea level. The ridge itself averages 200 to 300 feet above the surrounding valley floor, allowing panoramic views of the Great Smoky Mountains and adjacent ranges to the east and the Cumberland Plateau and Cumberland Mountains to the west.
A broadcast relay station, also known as a satellite station, relay transmitter, broadcast translator (U.S.), re-broadcaster (Canada), repeater or complementary station (Mexico), is a broadcast transmitter which repeats the signal of a radio or television station to an area not covered by the originating station.
Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves. They are received by another antenna connected to a radio receiver. In addition to communication, radio is used for radar, radio navigation, remote control, remote sensing, and other applications.
Farnsworth Peak is a peak located on the northern end of the Oquirrh Mountain range, approximately 3.5 miles (6 km) south east of Lake Point, Utah and 18 miles (29 km) south west of Salt Lake City, Utah, United States. The mountain is named for Philo Farnsworth, the inventor of the first completely electronic television. It is used mainly for radio and television transmission, but could potentially become part of a ski resort owned by nearby Kennecott Land. On the eastern side of the mountain, the land is completely private, and access is restricted. The peak can be reached by hiking from the Tooele side, which is mostly public land. The Bureau of Land Management land extends from Ridge Peak west to the base of the mountain. Public access to this land is available off SR-36 near Lake Point, Utah. Several cattle gates need to be opened and closed, but are access roads to hiking, mountain biking, and horseback riding areas.
The digital transition in the United States was the switchover from analog to exclusively digital broadcasting of terrestrial television programming. According to David Rehr, then president and CEO of the National Association of Broadcasters, this transition represented "the most significant advancement of television technology since color TV was introduced." For full-power TV stations, the transition went into effect on June 12, 2009, with stations ending regular programming on their analog signals no later than 11:59 p.m. local time that day.
In broadcasting, a transposer or translator is a device in or beyond the service area of a radio or television station transmitter that rebroadcasts signals to receivers which can’t properly receive the signals of the transmitter because of a physical obstruction. A translator receives the signals of the transmitter and rebroadcasts the signals to the area of poor reception. Sometimes the translator is also called a relay transmitter, rebroadcast transmitter or transposer. Since translators are used to cover a small shadowed area, their output powers are usually lower than that of the radio or television station transmitters feeding them.
Sugarloaf is a hill in the Port Hills, 8 km (5.0 mi) south of central Christchurch in New Zealand. The hill is home to the main television and FM radio transmitter for Christchurch and the wider Canterbury region.
WKUT-LD is a low-power television station broadcast from.a transmitter located just north of Elizabethtown, Kentucky, United States. Owned by HC2 Holdings, the station serves as an Oxygen affiliate, broadcasting on UHF channel 20, but through the use of PSIP, it is displayed on tuners as virtual channel 25. While the station is nominally licensed to Bowling Green, the station is actually based in Elizabethtown, Kentucky, and serving southern portions of the Louisville market.
