three-channel transmission system
91How television works — Analog televisionUntil the advent of digital television and flat panel displays in the 1990s, all television was based on the transmission and reception of analog signals, displayed on a cathode ray tube. Although a number of different broadcast… …
92Smart grid — Public infrastructure …
93Modulation — For musical change of key, see Modulation (music). For other uses, see Modulation (disambiguation). Passband modulation v · d · e …
94Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
95Electric locomotive — Electric Trains redirects here. For the 1995 Squeeze single, see Electric Trains (song). An electric locomotive is a locomotive powered by electricity from an external source. Sources include overhead lines, third rail or an on board electricity… …
96Fiber-optic communication — An optical fiber junction box. The yellow cables are single mode fibers; the orange and blue cables are multi mode fibers: 50/125 µm OM2 and 50/125 µm OM3 fibers respectively. Fiber optic communication is a method of transmitting information from …
97Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
98Nikola Tesla — Tesla, aged 37, 1893, photo by Sar …
99Super Audio CD — Media type Optical disc Encoding Digital (DSD) Capacity up to 7.95 GiB/GB …
100University Radio Essex — is a campus radio station at the University of Essex serving Wivenhoe Park in Colchester. It was one of the original University radio stations in the UK and with the other pioneering campus radio stations at York, Brunel, Loughborough, Sussex,… …
