Radiance per unit wavelength interval at a given wavelength, expressed in watts per steradian per unit area per wavelength interval.

The ratio of an optical detector's electrical output to its optical input, as a function of optical wavelength.

The wavelength interval over which the magnitude of all spectral components is equal to or greater than a specified fraction of the magnitude of the component having the maximum value.
Note 1: In optical communications applications, the usual method of specifying spectral width is the full width at half maximum. This method may be difficult to apply when the spectrum… (Read More →)

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See electromagnetic spectrum, optical spectrum.

See electromagnetic spectrum.

The pattern of radio signal frequencies, amplitudes, and phases, which pattern characterizes the output of a particular device and tends to distinguish it from other devices.

Reflection from a smooth surface, such as a mirror, which maintains the integrity of the incident wavefront.

Synonym bit robbing.

The power in dBm of a speech signal measured using a technique equivalent to Method B of ITU-T Recommendation P.5
6. [T1.255-1997]