| 单词 | vestigial side band |
| 释义 | > as lemmasvestigial side band 2. Telecommunications. vestigial side band, a side band which is partially attenuated (usually at the higher frequencies) before transmission; frequently attributive, with reference to a system in which one full side band and one vestigial side band are transmitted (with or without the carrier), esp. to improve the transmission of low-frequency components of the signal. ΘΚΠ society > communication > telecommunication > [adjective] > band of frequencies wide-band1931 vestigial side band1940 society > communication > telecommunication > [noun] > signal > frequency or band of frequencies > band of frequencies sideband1921 frequency band1922 passband1922 waveband1923 S-band1946 baseband1952 guard band1956 vestigial side band1966 1940 D. G. Fink Princ. Television Engin. vii. 288 At the transmitter, the principal problem of vestigial side~band transmission (as the above-described system is called) is the design of a filter having the pass characteristics shown in Fig. 162. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) I. 352/1 In standard television broadcasting in the continental United States..the vestigial sideband has a bandwidth one-sixth that of a full sideband. 1979 A. A. Liff Colour & Black & White Television Theory & Servicing ii. 55 The FCC standards require that the lower sideband be transmitted in vestigial sideband form and that the upper sideband be transmitted in its entirety. < as lemmas |
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