| 单词 | carrier current |
| 释义 | > as lemmascarrier current carrier current n. Telecommunications an alternating current on which a signal is superimposed for transmission by means of an electrical conductor. ΚΠ 1915 Trans. Amer. Inst. Electr. Engineers 34 ii. 2109 A carrier current modulated in amplitude in accordance with the variations in a telephone current, is however, not a single frequency system at all. 1922 Encycl. Brit. XXXII. 712/2 The appurtenances specially developed for accomplishing this selection [of frequencies] in carrier current telephony are known as ‘band-pass electrical filters’. 1967 M. F. Buchan Electr. Supply x. 296 As the two ends of the system may be some distance apart, an information link is required, and this may be a pilot cable, a radio link, or carrier currents superimposed on the system itself. 2001 J. Walker Rebels on Air xi. 227 He also turned to radio, getting involved with the prison's carrier-current station and, after his release, with WRFG in Atlanta. < as lemmas |
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