off/on signal
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Signal processing — is an area of systems engineering, electrical engineering and applied mathematics that deals with operations on or analysis of signals, in either discrete or continuous time. Signals of interest can include sound, images, time varying measurement … Wikipedia
Signal Flare — is the name of several fictional characters in the various Transformers universes.Transformers: EnergonTransformers character name =Signal Flare caption =Signal Flare in Dreadwave Productions comics. affiliation =Autobot subgroup =Omnicon rank =… … Wikipedia
Signal/One — was a manufacturer of high performance SSB and CW HF radio communications transceivers initially based in St. Petersburg, Florida, USA. History The company started as a division of NCR in Florida. A key executive was Dick Ehrhorn, ham callsigns… … Wikipedia
Signal lamp — training during World War II. A signal lamp (sometimes called an Aldis lamp, named after Arthur C. W. Aldis who invented a widely used design) is a visual signaling device for optical communication (typically using Morse code). Modern signal… … Wikipedia
Signal-averaged electrocardiogram — Signal averaged electrocardiography (SAECG) is a special electrocardiographic technique, in which multiple electric signals from the heart are averaged to remove interference and reveal small variations in the QRS complex, usually the so called… … Wikipedia
Off-hook tone — The off hook tone (also receiver off hook tone or off hook warning) is a telephony signal used to alert a user that the telephone has been left off hook for an extended period, effectively disabling the telephone line. See permanent signal.… … Wikipedia
Signal-to-noise ratio — For signal to noise ratio in statistics, see Cohen s d. Signal to noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined… … Wikipedia
Signal Corps in the American Civil War — U.S. Army Signal Corps station on Elk Mountain, Maryland, overlooking the Antietam battlefield. The Signal Corps in the American Civil War comprised two organizations: the U.S. Army Signal Corps, which began with the appointment of Major Albert J … Wikipedia
Signal Corps (United States Army) — U.S. Army Signal Corps Coat of Arms Active 3 March 1863 – Present Country … Wikipedia
Signal 1 — Infobox Radio station name = Signal One airdate = 5 September 1983 frequency = 96.4 MHz, 96.9 MHz, 102.6 MHz, DAB share = 13.9% share as of = September 2007 share source = [cite web|url=http://www.rajar.co.uk/listening/quarterly… … Wikipedia
Off-the-air — For the Adult Swim television series, see Off the Air (TV series). In telecommunication, the term off air or off the air has the following meanings: In radio communications systems, pertaining to a radio station or television station that is… … Wikipedia
