Glossary:

ATIS Telecom Glossary

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material scattering

Of an electromagnetic wave, scattering that is attributable to the intrinsic properties of the material through which the wave is propagating.
Note 1: Ionospheric scattering and Rayleigh scattering are examples of material scattering.
Note 2: In an optical fiber, material scattering is caused by micro-inhomogeneities in the refractive indices of the materials used to fabricate the fiber, including the dopants… (Read More →)

matrixing

The accomplishment of a color coordinate transformation by computational, electrical, optical, or by other means. [After IEEE 100] [After SMPTE]

matte

An image or signal that represents or carries only transparent information that is intended to overlay or control another image or signal. [After SMPTE]

MAU

Abbreviation for medium access unit.

maximal-ratio combiner

A diversity combiner in which (a) the signals from each channel are added together, (b) the gain of each channel is made proportional to the rms signal level and inversely proportional to the mean square noise level in that channel, and (c) the same proportionality constant is used for all channels. Synonyms ratio-squared combiner, post-detection combiner, predetection combining, selective combiner.

maximum block transfer time

The maximum allowable waiting time between initiation of a block transfer attempt and completion of a successful block transfer.

maximum calling area

Geographic calling limits permitted to a particular access line based on requirements for the particular line.
Note: Maximum calling area restrictions are imposed for network control purposes.

maximum disengagement time

The maximum allowable waiting time between initiation of a disengagement attempt and successful disengagement.

maximum keying frequency

In facsimile systems, the frequency in hertz numerically equal to the spot speed divided by twice the X-dimension of the scanning spot.

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