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The USA Network
USA Network (simply USA) is an American basic cable television channel owned by the NBCUniversal Television and Streaming division of Comcast's NBCUniversal through NBCUniversal Cable Entertainment. It was originally launched in 1977 as Madison Square Garden Sports Network, one of the first national sports cable television channels, before being relaunched under its current name on April 9, 1980. Since then, USA steadily gained popularity through its original programming, a long-established partnership with WWE and, for many years, limited sports programming that increased significantly in 2022 after the shutdown of NBCSN. As of September 2018, USA Network is commercially available to about 90.4 million households (98% of households with pay television) in the US. History Madison Square Garden Sports Network (1977–1980) USA Network originally launched on September 22, 1977, as the Madison Square Garden Sports Network (not to be confused with the New York City-area region ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1080i
1080i (also known as Full HD or BT.709) is a combination of frame resolution and scan type. 1080i is used in high-definition television (HDTV) and high-definition video. The number "1080" refers to the number of horizontal lines on the screen. The "i" is an abbreviation for "interlaced"; this indicates that only the even lines, then the odd lines of each frame (each image called a video field) are drawn alternately, so that only half the number of actual image frames are used to produce video. A related display resolution is 1080p, which also has 1080 lines of resolution; the "p" refers to progressive scan, which indicates that the lines of resolution for each frame are "drawn" on the screen in sequence. The term assumes a widescreen aspect ratio of 16:9 (a rectangular TV that is wider than it is tall), so the 1080 lines of vertical resolution implies 1920 columns of horizontal resolution, or 1920 pixels × 1080 lines. A 1920 pixels × 1080 lines screen has a total of 2.1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sling TV
Sling TV is an American streaming television service operated by Sling TV LLC, a wholly-owned subsidiary of Dish Network. Unveiled on January 5, 2015, at the Consumer Electronics Show, the virtual multichannel video programming distributor aims to complement subscription video on demand services for cord cutters, offering a selection of major cable channels and OTT-originated services that can be streamed through smart TVs, digital media players and apps. The service is available in the United States and Puerto Rico as of 2015. Sling TV is led by Erik Carlson, who also serves as the President and COO of Dish Network. The service's precursor, the ethnic television service DishWorld, was also brought under the auspices of Sling TV LLC and was rebranded as Sling International. Following an invitation-only beta launch of the service that began in January of that year, Sling TV formally launched on February 9, 2015. In August 2021, the service reached a total of 2.44 million subs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave Relay
Microwave transmission is the transmission of information by electromagnetic waves with wavelengths in the microwave frequency range of 300MHz to 300GHz(1 m - 1 mm wavelength) of the electromagnetic spectrum. Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay network. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter, but such systems are expensive and generally used only in specialist roles. Although an experimental microwave telecommunication link across the English Channel was demonstrated in 1931, the development of radar in World War II provided the technology for practical exploitation of microwave communication. During the war, the British Army introduced the Wireless Set No. 10, which used microwave relays to multiplex eight telephone channels over long distances. A link across the English Channel allowe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Satellite
A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military applications. Many communications satellites are in geostationary orbit above the equator, so that the satellite appears stationary at the same point in the sky; therefore the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite. Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently. The high frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth. The purpose of communications sate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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