signal device
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Signal integrity — or SI is a measure of the quality of an electrical signal. In digital electronics, a stream of binary values is represented by a voltage (or current) waveform. Over short distances and at low bit rates, a simple conductor can transmit this with… … 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 reflection — occurs when a signal is transmitted along a transmission medium, such as a copper cable or an optical fiber, some of the signal power may be reflected back to its origin rather than being carried all the way along the cable to the far end. This… … Wikipedia
signal — [sig′nəl] n. [OFr < VL signale < neut. of LL signalis < L signum, a SIGN] 1. Now Rare a token or indication 2. a sign or event fixed or understood as the occasion for prearranged combined action [a bugle signal to attack] 3. anything… … English World dictionary
signal — n *sign Analogous words: *alarm, tocsin, alert: *gesture, gesticulation: *motion, movement: *device, contrivance, contraption signal adj salient, striking, arresting, outstand … New Dictionary of Synonyms
Signal generator — A signal generator, also known variously as a test signal generator, function generator, tone generator, arbitrary waveform generator, digital pattern generator or frequency generator is an electronic device that generates repeating or non… … 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 box — A signal box or signal cabin is a building from which railway signals and points are controlled. The term signal cabin is used in Ireland, parts of Scotland and in Australia while in North America, the term interlocking tower predominates.… … Wikipedia
Signal tracer — A signal tracer is a piece of electronic test equipment used to troubleshoot radio and other electronic circuitry.Usually a very simple device, it normally provides an amplifier, and a loudspeaker, often battery powered and packaged into a small … Wikipedia
Signal Corps (United States Army) — U.S. Army Signal Corps Coat of Arms Active 3 March 1863 – Present Country … Wikipedia
