Master Catalog Page 576 Glossary

Alpha Wire 1-800-52 ALPHA Specifications subject to change. For complete specifications and availability, visit 576 shrink tubing Tubing which has been extruded, cross-linked and non cross-linked, and mechanically expanded which when reheated will return to its original diameter. signal A current used to convey information, either digital, analog, audio or video. signal cable A cable designed to carry current of usually less than one ampere per conductor. simplex Mode of data transmission in one direction only. Usually on a two-wire facility. sintering A method of heat sealing. Fusion of a spirally applied tape wrap jacket by the use of high heat to a homogenous continuum. Usually employed for fluorocarbon, non-extrudable materials. SIS XLP switchboard wire. skin effect The phenomenon in which the depth of penetration of electric currents into a conductor decreases as the frequency increases. sleeving A braided, extruded or woven tube. SNR Signal-to-noise ratio. soldering sleeves Shrinkable tubing with a solder preform used for highest reliability soldering connections or shield grounding. solid conductor A conductor consisting of a single wire. span In flat cables, the distance from the reference edge of the first conductor to the reference edge of the last conductor (in cables having flat conductors), or the distance between the centers of the first and last conductors (in cables having round conductors), expressed in inches or centimeters. spark test A test designed to locate imperfections (usually pin-holes) in the insulation of a wire or cable by application of a voltage for a very short period of time while the wire is being drawn through the electrode field. specific gravity The ratio of the density (mass per unit volume) of a material to that of water. specific inductive capacity (SIC) See dielectric constant. spiral wrap The helical wrap of a material over a core. splice A mechanical device or fusion process that permanently bonds two fibers together without a connector producing extremely low loss. spool Circular container on which wire is wound for storage or transit normally refers to sizes smaller than 18" in diameter. stability factor The difference between the percentage power factor at 80 volts/mil and at 40 volts/mil measured on wire immersed in water at 75C for a specified time. static condition Used to denote the environmental conditions of an installed cable rather than the conditions existing during cable installation. STP Shielded twisted pair cable. strand A single uninsulated wire. stranded conductor A conductor composed of single solid wires twisted together, either singly or in groups. strip force The force required to remove a small section of insulating material from the conductor it covers. structural return loss (SRL) Expresses the amount of signal lost in negative terms, and occurs when signals reflect back to points of transmission. suggested working voltage AC voltage that can be applied between adjacent conductors. Supra-Shield Alpha Wire's trade name for foil/braid combination used for maximum shielding effectiveness. surface resistivity The resistance of a material between two opposite sides of a unit square of its surface. It is usually expressed in ohms. surge A temporary, large increase in the voltage or current in an electric circuit or cable. sweep test A method to determine the frequency response of a cable, by generating an RF voltage whose frequency is varied at a rapid constant rate over a given range. switchboard cable The cable used within and between the central office main frames and the switchboard. tank test A voltage dielectric test in which the test sample is submerged in water and voltage is applied between the conductor and water as ground. Glossary

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