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A passband is the range of frequencies or wavelengths that can pass through a filter.

A bandpass-filtered signal (that is, a signal with energy only in a passband), is known as a bandpass signal contrary to a baseband signal.<ref> {{#invoke:citation/CS1|citation |CitationClass=book }}</ref>

Passband sections
Intro   Filters    Digital transmission    Details    See also   References  

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