• abrasive: Any of a numb of hard materials, such as aluminum oxide, silicon carbide, and diamond, that are powdered and carefully graded according to particle size, and used to shape and/or finish optical elements, including the end faces of optical fibers and connectors. Note: For finishing the end faces of optical fiber connectors, abrasive particles are adhered to a substrate of plastic film, in a fashion after that of sandpaper. The film is in turn supported by a hard, flat plate. The connector is supported by a fixture that holds it securely in the proper position for finishing. The grinding motion may be performed manually or by a machine.
• absolute delay: The time interval or phase difference between transmission and reception of a signal. (188)
• absolute gain: 1. Of an antenna, for a given direction and polarization, the ratio of (a) the power that would be required at the input of an ideal isotropic radiator to (b) the power actually supplied to the given antenna, to produce the same radiation intensity in the far-field region. Note 1: If no direction is given, the absolute gain of an antenna corresponds to the direction of maximum effective radiated power. Note 2: Absolute gain is usually expressed in dB. (188) Synonym isotropic gain. 2. Of a device, the ratio of (a) the signal level at the output of the device to (b) that of its input under a specified set of operating conditions. Note 1: Examples of absolute gain are no-load gain, full-load gain, and small-signal gain. Note 2.’ Absolute gain is usually expressed in dB. ( 188)
Defines standard
Replaced/Superseded by document(s)
Cancelled by
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| File | MIME type | Size (KB) | Language | Download | |
|---|---|---|---|---|---|
| FED STD- Telecommunications Glossary of Telecommunication Terms.PDF | application/pdf | 24.53 MB | English | DOWNLOAD! |
Provides definitions
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Foreword
This standard is issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. This document provides Federal departments and agencies a comprehensive source of definitions of terms used in telecommunications and directly related fields by international and U.S. Government telecommunications specialists.
Introduction
This glossary provides definitions for the fields subsumed by the umbrella discipline of telecommunications. Fields define herein include: antenna types and measurements, codes/coding schemes, computer and data communications (computer graphics vocabulary, file transfer techniques, hardware, software), fiber optics communication, facsimile types and techniques, frequency topics (frequency modulation, interference, spectrum sharing), Internet, ISDN, LANs (MANs, WANS), modems, modulation schemes, multiplexing techniques, networking (network management, architecture/topology), NII, NS/EP, power issues, PCS/UPT/cellular mobile, radio communications, routing schemes, satellite communications, security issues, switching techniques, synchronization/timing techniques, telegraphy, telephony, TV (UHF, VHF, cable TV, HDTV), traffic issues, transmission/propagation concerns (signal loss/attenuation, transmission lines), video technology, and wave propagation/measurement terminology.