![]() ![]() Bedford, Journal of the Royal Society of Arts, 11 Feb. To transmit such synchronising pulses we have to sacrifice a certain proportion of the transmission time, this apparently involving a corresponding increase of transmission bandwidth but, in fact, we already have to sacrifice transmission time to allow “flyback” of the scanning spot. Most people who began using bandwidth in the 1990s or later employ it primarily in the sense given by our second definition: “the capacity for data transfer of an electronic communications system.” While this word came to prominence through use to describe data transfers over the Internet, we do see its use in this manner prior to the 1990s. Goldsmith says that a band width of five kilocycles is required for a 24-line picture 20 kilocycles for a 48-line picture and 80 kilocycles for a 96-line picture. Vreeland, The Christian Science Monitor (Boston, MA), 3 Feb. Increased sensitivity and selectivity are thus secured with no diminution in the band width. Thomas Preston, The Theory of Light, 1890 Since the displacement of any band system increases as the wave length, or band width, decreases, it follows that du and dw have opposite signs, and hence the abnormal displacement increases the normal effect of the interposed plate. The earliest uses of this word, coming in the late 19th century, carry the meaning “a range within a band of wavelengths, frequencies, or energies.” The word appears to have been applied initially to light waves, and subsequently to radio and television. The term has broadened from "data capacity" to "personal capacity."īandwidth is more similar to telescope than to electrocardiograph it entered our language allied closely with science and technology, but which is gradually branching out into non-specialized use.
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