Main Page | See live article | Alphabetical index Bandwidth is the width, usually measured in Hertz, of a frequency band. It can also be used to describe a signal, in which case the meaning is the width of the smallest frequency band within which the signal can fit. Bandwidth is related to the amount of information that can flow through a channel through the Nyquist-Shannon sampling theorem. The bandwidth of an electronic filter is the part of the filter's frequency response that lies within 3 dB of its peak. The term bandwidth is also used, informally, and by extension from the above, to mean the amount of data that can be transferred through a connection in a given time period. Bandwidth is normally based on the frequencies used and the spectral spread of the information caried on the frequency. See also Shannon's law. Modulation. Signalling schemes. Baud rate. Narrowband Broadband. Latency. List of device bandwidths Latency vs Bandwidth This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.