| 单词 | transmitter |
| 释义 | transmitter 1 The equipment used to generate and broadcast radio-frequency electromagnetic waves for communication purposes. In transmitted-carrier transmission it consists of a carrier-wave generator, a device for modulating the carrier wave in accordance with the information to be broadcast, amplifiers, and an aerial system. In suppressed-carrier transmission , the carrier component of the carrier wave is not transmitted; one sideband (single-sideband transmission ) or both sidebands (double-sideband transmission ) are transmitted and a local oscillator in the receiver regenerates the carrier frequency and mixes it with the received signal to detect the modulating wave. 2 The part of a telephone system that converts sound into electrical signals. |
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