picture signal transmitter
31Amateur radio repeater — An amateur radio repeater is an electronic device that receives a weak or low level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation. Many repeaters are… …
32Indian Head test card — The Indian Head Test Card was a black and white television test pattern which was introduced in 1939 by RCA of Harrison, New Jersey as a part of the RCA TK 1 Monoscope. 20th century television later became so important socially that this purely… …
33Digital television in Canada — (more specifically, digital terrestrial television in Canada or digital over the air television (OTA) in Canada) is transmitted using the ATSC standards developed for and in use in the United States. Because Canada and the U.S. use the same… …
34MIMO — This article is about MIMO in wireless communication. For other uses, see MIMO (disambiguation). Understanding of SISO, SIMO, MISO and MIMO (note that the terms input and output refer to the radio channel carrying the signal, not to the devices… …
35Quadrature amplitude modulation — (QAM) (Pronounced IPA|kwa:m) is a modulation scheme which conveys data by changing ( modulating ) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature… …
36Signals intelligence — SIGINT redirects here. For the UNIX signal, see SIGINT (POSIX). RAF Menwith Hill, a large site in the United Kingdom, part of ECHELON and the UK USA Security Agreement. Signals intelligence (often contracted to SIGINT) is intelligence gathering… …
37Digital television — List of digital television broadcast standards DVB standards (Europe) DVB S (satellite) DVB S2 DVB T (terrestrial) DVB T2 DVB …
38Remote control — For other uses, see Remote control (disambiguation). A television remote control unit (RCU) A remote control is a component of an electronics device, most commonly a television set, used for operating the television device wireless …
39WNBC — This article is about the current Channel 4 in New York City. For broadcast stations that previously used the WNBC call sign, see WNBC (disambiguation). WNBC Logo used on website New York, New Yor …
40Electromagnetic interference at 2.4ghz — can affect various devices.This article details the different users of the 2.4ghz band, how they cause interference to other users and how they are prone to interference from other users.PhoneMany cordless telephones in the US and Canada use the… …
