In any technology or process involving (a) sampling a signal, e.g., an electrical signal or (a series of images of) a moving subject; (b) processing, storing, or transmitting representations of the samples; and (c) replicating the original signal from the representations: the production of artifacts as a result of sampling at intervals too great to permit faithful replication of the… (Read More →)

A bundle of optical fibers in which the relative spatial coordinates of each fiber are the same at the two ends of the bundle.
Note: Such a bundle may be used for the transmission of images. Synonym coherent bundle.

A procedure by which the error rate of a signaling link is measured during the initial alignment process. [After T1.11
0. 2-1992] [After T1.226-1992]

The short-term variations between the optimum sampling instants of a digital signal and the sampling clock derived from it. [T
1. Rpt17-1993]

An equipment condition in which all trunks (paths) in a given trunk group are busy.
Note: All-trunks-busy registers do not indicate subsequent attempts to reach trunk groups.

Synonym all-silica fiber.

An optical fiber composed of a silica-based core and cladding.
Note: The presence of a protective polymer overcoat does not disqualify a fiber as an all-silica fiber, nor does the presence of a tight buffer. [FAA] Synonym all-glass fiber.

One half of the time average over the sum of the squares of the differences between successive readings of the frequency deviation sampled over the sampling period.
Note: The Allan variance is conventionally expressed by y2(). The samples are taken with no dead-time between them. Synonym two-sample variance.

In adaptive high-frequency (HF) radio automatic link establishment (ALE), a general broadcast that does not request responses and does not designate any specific addresses.
Note: This essential function is required for emergencies ("HELP"), sounding-type data exchanges, and propagation and connectivity tracking. [After FED-STD-1045A]

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