- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
An electromagnetic waveguide (a) that consists solely of dielectric materials, (b) in which the dielectric propagation medium has a rectangular cross section, (c) that has a width, thickness, and refractive indices that determine the operating wavelength and the modes the guide will support beyond the equilibrium length, (d) that may be cladded, protected, distributed, and electronically controllable, and (e) that may be used in various applications, such as in integrated optical circuits (IOCs) in which their shape is geometrically more convenient than the optical fibers that are circular in cross section, that are used in fiber optic cables for long-distance transmission. Note: Their principle of operation is the same as that for optical fibers that are circular in cross section. . Synonym planar waveguide.
Industry:Telecommunications
An electromagnetic waveguide (a) that is tubular, usually with a circular or rectangular cross section, (b) that has electrically conducting walls, (c) that may be hollow or filled with a dielectric material, (d) that can support a large number of discrete propagating modes, though only a few may be practical, (e) in which each discrete mode defines the propagation constant for that mode, (f) in which the field at any point is describable in terms of the supported modes, (g) in which there is no radiation field, and (h) in which discontinuities and bends cause mode conversion but not radiation.
Industry:Telecommunications
An electronic analog or digital base switching unit containing the central call processing functions which service the host office and its remote locations.
Industry:Telecommunications
An electronic circuit designed to produce an ideally stable alternating voltage or current.
Industry:Telecommunications
An electronic circuit that consists of many individual circuit elements, such as transistors, diodes, resistors, capacitors, inductors, and other active and passive semiconductor devices, formed on a single chip of semiconducting material and mounted on a single piece of substrate material. Synonyms yychip, microcircuit.
Industry:Telecommunications
An electronic circuit that controls an oscillator so that it maintains a constant phase angle relative to a reference signal. Note: Phase-locked loops are widely used in space communications for coherent carrier tracking and threshold extension, bit synchronization, and symbol synchronization.
Industry:Telecommunications
An electronic conference in which participants exchange computer messages via a moderator who may accept, modify, or reject them.
Industry:Telecommunications
An electronic counter-countermeasure (ECCM) in which communications nets' operating frequencies are widely separated from each other, causing a requirement to spread jamming power over wider frequency bands and thus compelling a reduction of available jamming power on any single channel or frequency, or causing a requirement for more jamming power or more jamming equipment.
Industry:Telecommunications
An electronic device or electronic equipment modification designed to gain unauthorized interception of information-bearing emanations.
Industry:Telecommunications
An electronic instrument used to characterize and locate faults in metallic cables (e.g., twisted pair, coax. ) Note 1: A TDR transmits a fast rise time pulse along the conductor. The resulting reflected pulse is measured at the input as a function of time and displayed on the instrument or plotted, as a function of cable length. Note 2: A TDR may be used to verify cable impedance characteristics, splice and connector location and associated losses, and estimate cable lengths.
Industry:Telecommunications
