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The following other wikis use this file: Usage on anp.wikipedia.org टेलिविज़न; Usage on da.wikipedia.org Analog tv; Usage on de.wikipedia.org
A television transmitter is a transmitter that is used for terrestrial (over-the-air) television broadcasting.It is an electronic device that radiates radio waves that carry a video signal representing moving images, along with a synchronized audio channel, which is received by television receivers ('televisions' or 'TVs') belonging to a public audience, which display the image on a screen.
In transmitters several correction and equalization stages are used after modulation. In direct modulation these stages must be developed separately for each output RF (so called channel). On the other hand, in superheterodyne transmitters since a single intermediate frequency signal is used, only one type of stage for IF is developed.
Block diagram for a typical analog monochrome television receiver. The tuner is the object which, with the aid of an antenna, isolates the television signals received over the air. There are two types of tuners in analog television, VHF and UHF tuners. The VHF tuner selects the VHF television frequency.
TVRadioWorld TV stations directory; W9WI.com (Terrestrial repeater and TV hobbyist information) TV Coverage maps and Signal Analysis; A History of Television at the Canada Science and Technology Museum; The Encyclopedia of Television at the Museum of Broadcast Communications; The Evolution of TV, A Brief History of TV Technology in Japan NHK
A low-noise block downconverter (LNB) is the receiving device mounted on satellite dishes used for satellite TV reception, which collects the radio waves from the dish and converts them to a signal which is sent through a cable to the receiver inside the building.
Here we show block diagrams for typical superheterodyne receivers for AM and FM broadcast respectively. This particular FM design uses a modern phase locked loop detector, unlike the frequency discriminator or ratio detector used in earlier FM receivers. A schematic of a simple superhet broadcast FM receiver.
DVB-T, short for Digital Video Broadcasting – Terrestrial, is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 [1] and first broadcast in Singapore in February 1998.
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