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JĆ1
Appendix J
Glossary of Terms
attenuation:
signal reduction inherent in a transmission line or cable over a
given distance. The amount of loss is usually stated in decibels per kilometer at a
specific wavelength.
bend loss:
increased attenuation caused by bending a fiber cable at a radius
smaller than the recommended bend radius.
bend radius, minimum:
radius to which a fiber cable can be bent without
damaging the cable.
BNC series:
a radio frequency (RF) quick connect/disconnect connector covered
by Military Specification.
braid:
a weave of metal fibers used as a shield covering for an insulated
conductor or a group of insulated conductors.
breakout cable
: a tightlyĆbuffered multifiber fiberĆoptic cable.
buffer:
the coating immediately surrounding an individual optical fiber. It is used
for mechanical protection of the fiber.
cladding:
the glass or plastic outer coating of an optical fiber that surrounds the
core and keeps the light within the fiber. It is usually described by its diameter.
coaxial cable:
a cylindrical transmission line comprised of a center conductor, a
dielectric material, a shield (or an outer conductor), and usually covered by an
insulating jacket.
conduit:
a pipe, tube, or tile for routing and protecting electrical wires or cables.
connector:
a coupling device designed to connect conductors from one circuit
with those from another circuit.
core:
the central portion of an optical fiber that actually carries the light. It is
usually described by its diameter in microns. For example, 50/125 means 50
micron diameter core, 125 micron diameter cladding.
crimping tool:
a mechanical device that is used to crimp a contact and a ferrule
of a BNC Plug connector.
dielectric:
a material that serves as an insulator.
discontinuity:
a broken connection (open circuit), or loss of specified connection
characteristic.
dust cap:
a device attached to a connector to provide protection against dust
and foreign debris.
ferrule:
a short tube used to make a solderless connection to shielded or coaxial
cable.
fiberĆoptic link:
a data transmission system consisting of a transmitter, receiver,
and length of fiberĆoptic cable.
fiber optics:
light pulse transmission through optical fibers.
ground:
a connection between an electrical circuit and the earth, or some
conducting body (e.g., chassis) serving in place of earth.
heatĆshrinkable:
describes tubes, caps, sleeves, boots, or other forms of plastic
which shrink when heated to encapsulate, protect or insulate connections,
splices, terminations and other configurations.
impedance:
the total opposition a circuit, cable or component offers to
alternating current. It includes both resistance and reactance and is generally
expressed in ohms.
Содержание AutoMax 57C328
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