bandwidth


bandwidth
/band"width', -with'/, n.
1. Telecommunications. the smallest range of frequencies constituting a band, within which a particular signal can be transmitted without distortion.
2. the transmission capacity of an electronic communications device.
[1925-30; BAND2 + WIDTH]

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Measurement of the capacity of a communications signal.

For digital signals, the bandwidth is the data speed or rate, measured in bits per second (bps). For analog signals, it is the difference between the highest and lowest frequency components, measured in hertz (cycles per second). For example, a modem with a bandwidth of 56 kilobits per second (Kbps) can transmit a maximum of about 56,000 bits of digital data in one second. The human voice, which produces analog sound waves, has a typical bandwidth of three kilohertz between the highest and lowest frequency sounds it can generate.

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      in electronics, the range of frequencies occupied by a modulated radio-frequency signal, usually given in hertz (cycles per second) or as a percentage of the radio frequency. For example, an AM ( amplitude modulation) broadcasting station operating at 1,000,000 hertz has a bandwidth of 10,000 hertz, or 1 percent (10,000/1,000,000). The term also designates the frequency range that an electronic device, such as an amplifier or filter, will transmit.

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Universalium. 2010.

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