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Aerials mounted on the rooftops of houses in England. Aerials are attached to roofs in various ways, usually on a pole to elevate it above the roof. This is generally sufficient in most areas. In some places, however, such as a deep valley or near taller structures, the antenna may need to be placed significantly higher, using a guyed mast or mast.
Analog television system by nation Analog color television encoding standards by nation. Every analog television system bar one began as a black-and-white system. Each country, faced with local political, technical, and economic issues, adopted a color television standard which was grafted onto an existing monochrome system such as CCIR System M, using gaps in the video spectrum (explained ...
The Short-term Analog Flash and Emergency Readiness Act, or SAFER Act, (S. 3663, Pub. L. 110–459 (text)) is a U.S. law that required the Federal Communications Commission (FCC) to allow the continuation of full-power analog TV transmissions in 2009 for an additional 30 days for the purpose of broadcasting public service announcements ...
VHF analog TV ceased in New Zealand on 1 December 2013. Channels 10 and 11 weren't added until the late 1980s (except Indonesia). VHF analog TV channel 1A is only used in Indonesia. VHF is currently no longer used for television in Indonesia (except in some regions until 2022) and only UHF is used for both analog and digital television, as in ...
Nevertheless, moving from a 100 kW low-VHF analog signal to a 1 MW UHF signal is still a considerable change, which some broadcasters estimated could cost up to $4 million per station (although most estimates were much lower, on the order of $400,000). For this reason, channels in the high-VHF region were kept for television use.
Full-power terrestrial broadcasts using the analog NTSC standard was required by law to cease by June 12, 2009. [88] Some television sets will continue to use analog NTSC tuners if connected to an analog cable system, or a converter box (which may receive digital signals over the air, from a cable system, or from a satellite system).
Analog satellite receivers were still used by 6% of households in 2010 as the highest in Europe. The analog satellite transmissions (broadcasting on Astra 19.2°E) were switched off on 30 April 2012, being the last in Europe. However, analog cable is still used by about 30% of the population and 55% of all cable broadcasts.
The LFR remained as the main aerial navigation technology until it was replaced by the VOR system in the 1950s and 1960s. The Adcock antenna array has been widely used commercially, and implemented in vertical antenna heights ranging from over 40 m (130 feet) in the LFR network, to as small as 13 cm (5 inches) in tactical direction finding ...