
A passband is the range of frequencies or wavelengths that can pass through a filter without being attenuated. 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. == Filters == In telecommunications, optics, and acoustics, a passband (a band-pass filtered sign...
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the primary wavelength interval of transmission of a gas filter.
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http://www.chemistry-dictionary.com/definition/passband.php
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