Installation Guide

Table Of Contents
Glossary
52 78-4002497-01 Rev F
G
GHz
Gigahertz. A unit of frequency equal to one billion cycles per second.
GND
ground. A conducting connection, whether intentional or accidental, by which an electric
circuit or equipment is connected to the earth, or to some conducting body of relatively large
extent that serves in place of the earth.
H
headend
The local switching or processing center for the cable network in a hybrid fiber/coax network.
Location for equipment that receives data from a satellite (or other) source and reformats that
data for input to a broadband distribution network.
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.
Hz
hertz. A unit of frequency equal to one cycle per second.
I
in-lb
inch-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 inch from the pivot point.
ingress
The process whereby unwanted signals enter the cable system to occupy spectrum that would
otherwise remain free of signal energy.
L
LCSI
local craft serial interface.
LED
light-emitting diode. An electronic device that lights up when electricity passes through it.
LO
local oscillator.