Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Guia Da Instalação
Glossary
54
4024769 Rev A
frequency
The number of similar shapes in a communications or electrical path in a unit of time. For
example, the number of sine waves moving past a fixed point in a second.
example, the number of sine waves moving past a fixed point in a second.
frequency agile
The ability to change from one frequency to another without changing components.
frequency response
The effect that changing the frequency has on the magnitude of a signal.
frequency stability
A measure of the departure from nominal frequency value of a signal, with respect to time,
temperature, or other influence.
temperature, or other influence.
ft-lb
foot-pound. A measure of torque defined by the application of one pound of force on a lever
at a point on the lever that is one foot from the pivot point.
at a point on the lever that is one foot from the pivot point.
G
gain
A measure of the increase in signal level, relative to a reference, in an amplifier. Usually
expressed in decibels.
expressed in decibels.
H
Hertz
A unit of frequency equal to one cycle per second.
HFC
hybrid fiber/coaxial. A network that uses a combination of fiber optics and coaxial cable to
transport signals from one place to another. A broadband network using standard cable
television transmission components, such as optical transmitters and receivers, coaxial cable,
amplifiers, and power supplies. The broadband output stream is transmitted as an optical
signal, over the high-speed, fiber optic transmission lines to local service areas where it is
split, converted to electrical RF signals, and distributed to set-tops over coaxial cable.
transport signals from one place to another. A broadband network using standard cable
television transmission components, such as optical transmitters and receivers, coaxial cable,
amplifiers, and power supplies. The broadband output stream is transmitted as an optical
signal, over the high-speed, fiber optic transmission lines to local service areas where it is
split, converted to electrical RF signals, and distributed to set-tops over coaxial cable.
HMS
hybrid management sublayer. A set of ANSI/SCTE standards specifying an element
management system for hybrid fiber/coaxial networks. The standards establish key
protocols for the communication of status monitoring information between elements in the
network.
management system for hybrid fiber/coaxial networks. The standards establish key
protocols for the communication of status monitoring information between elements in the
network.