Gepco 61801EZ-0.99 User Manual

Gepco International, Inc.  

P. 847

.795.9555  F

. 847

.795.8770  www

.gepco.com

APPENDIX

APPENDIX

–Alumuminum.

–Conductive aluminum foil

bonded to a non-conductive polyester tape.
Provides for improved flexlife and allows for
cables without pair jackets to have isolated
shields.

–Wire, which after final draw-

down, has been heated and slowly cooled to
remove the effects of cold working.

–The decrease in magnitude of a

wave as it travels through any transmitting medi-
um, such as cable or circuitry.  Attenuation is
measured as a ratio or as the logarithm of a
ratio (decibel).

–American Wire Gage. A wire diameter

specification. The higher the AWG number, the
smaller the wire diameter.

–Designation for appliance wiring material.

–A circuit so arranged that the

impressed voltages on each conductor of the
pair are equal in magnitude but opposite in
polarity with respect to ground.

–The difference between the upper

and lower limits of a given band of frequencies.
Expressed in Hertz.

–Bare copper.

–Bare copper clad steel.

–A unit that represents the logarithm of the

ratio of two levels. The number of bels is equal
to the logarithm10 of (P1/P2) 2 logarithm10
(11/12). See dB.

–A textile or metallic group of filaments

interwoven into a cylindrical structure to form a
covering over one or more wires or flattened
into a strap.

–Storage of electrically separated

charges between two plates having different
potentials.  The value depends largely on the
surface area of the plates and the distance
between them.  The unit of measurement is
expressed in farads.

–The capacitance between

two conductors with all other conductors, includ-
ing shield, short circuited to ground.

–Expanded or “foam” Teflon (fluori-

nated ethylene-propylene) consisting of individ-
ual closed cells of inert gas suspended in a
Teflon medium.  This results in a reduction of the
dielectric constant and an increase in the veloci-
ty of propagation percentage. 

–Expanded or “foam” poly-

ethylene, consisting of individual closed cells of
inert gas suspended in a polyethylene medium,
resulting in a reduction of dielectric constant and
an increase in velocity of propagation (%).

–The area of a circle one mil (.001”)

in diameter; 7.845 x 107 sq. in. Used in
expressing wire cross sectional area.

–coaxial.

–A cable consisting of two cylindri-

cal conductors with a common axis, separated
by a dielectic.

–Noise, caused by a difference in

“ground potential”.  By grounding at either end
rather than both (usually grounded at one
source) one can reduce this interference.

–An insulating or jacketing material

made by mixing two or more ingredients.

–A material suitable for carrying elec-

trical current.

–A type of interference caused by sig-

nals from one circuit being coupled into adja-
cent circuits.

–Decibel(s).

–Direct current resistance.

–Any insulating material between two

conductors which permits electrostatic attraction
and repulsion to take place across it.

–Also called permitivity.  That

property of a dielectric which determines the
amount of electrostatic energy that can be
stored by the material when a given voltage is
applied to it.  Actually, the ratio of the capaci-
tance of a capacitor using the dielectric to the
capacitance of an identical capacitor using a
vacuum as a dielectric.

–A class of long chain polymers capa-

ble of being crosslinked to produce elastic com-
pounds, e.g., polychloroprene and ethylen
propylene rubber.

–Referring to the combined elec-

tric and magnetic fields associated with move-
ments of electrons through conductors.

 –Electromagnetic interference.

–Unit of capacitance whereby a charge of

one coulomb produces a one volt potential dif-
ference.

–Solid Teflon (fluorinated ethylene-propy-

lene) Registered Trademark, Dupont Co.–A fluo-
rocarbon extrudable resin with good electrical
insulating properties and chemical and heat
resistance.

–The measurement of the ability of a

conductor or cable to withstand repeated bend-
ing.

–Feet.

–Gepco TPE jacket compound that is

extra-flexible, durable, and UL Listed.  Remains
flexible in high/low temperature environments.

–Registered trademark, Ausimon Corp.

–The total opposition a circuit, cable,

or componenet offers to alternating current.  It
includes both resistance and reactance and is
generally expressed in ohms.

–In a transmission

cable of infinite length, the ratio of the applied
voltage to the resultant current at the point the
voltage is applied.  Or, the impedance which
makes a transmission cable seem infinitely long,
when connected across the cable’s output termi-
nals. For a wave guide, it is the ratio of rms volt-
age to the total rms longitudinal current at cer-
tain points on a diameter, when the wave guide
is match-terminated.

–A measure of the attenuation of a

device by determining the output of a system
before and after the device is inserted into the
system.

–A material having good dielectric

properties which is used to separate close eletri-
cal components, such as cable conductors and
circuit components.

–Pertaining to wire and cable, the outer

sheath which protects against environment and
may also provide additional insulation.

–Kilometer.

–Meters.

–1000.

–Megahertz (one million cycles per second).

Formerly Mc.

–Millimeter.

–DuPont trade name for a polyester material.

–Any spurious or unwanted signal in a

cable or electrical circuit, e.g., EMI, RFI, tape, or
amplifier thermal noise.

–The term used to express resistance in an

electrical circuit where the resistance is directly
proportional to the voltage and inversely pro-
portional to the current.

–Polyethylene.

–Pico farad(s).

–The air return path of a central air han-

dling system, either ductwork or open space
over a dropped ceiling.

–A family of insulations derived

from the polymerizaton of ethylene gas and
characterized by outstanding electrical proper-
ties, including high I.R., low dielectric constant,
and low dielectric low across the frequency
spectrum.  Mechanically rugged, it resists abra-
sion and cold flow.

–A thermoplastic similar to poly-

ethylene but stiffer and having a higher soften-
ing point (temperature).

–A family of flexible, abrasion-

resistant polymers used for harsh environment
cables.

–A general purpose family of

insulations whose basic constituent is
polyvinylchloride or its copolyer with vinyl
acetate.  Plasticizers, stabilizers, pigments and
fillers are added in lesser quantity to improve
mechanical and/or electrical properties of this
material.

–Polypropylene.

™–Trademark of ADC

Telecommunications.  Camera connector for use
with triaxial cable.

–Polyurethane.

–Polyvinylchloride.

–Polyvinylidene flouride, a fluorocarbon

material.

–In cables, a metallic layer placed around

a conductor to prevent eletrostatic interference
between the enclosed wires and external fields.

–A conductor consisting of a sin-

gle wire.

–A conductor composed of

single solid wires twisted together, either singly
or in groups.

–Tinned copper.

–A material which softens when

heated or reheated and becomes firm on cool-
ing.

–Thermoplastic elastomer.

–A cable construction having three

coincident axes, such as conductor, first shield,
and second shield all insulated from one anoth-
er.

 –Registererd trademark of Kings

Electronics.  Camera connector for use with tri-
axial cable.

–(Underwriters Laboratories) A nonprofit inde-

pendent organization which operates a listing
service for electrical and electronic materials
and equipment.

–The speed of an electri-

cal signal down a length of cable compared to
speed in free space expressed as a percent. It is
the reciprocal of the square root of the dielectric
constant of the cable insulation.