Installation Guide

Glossary
50 78-4002497-01 Rev F
B
bit
binary digit. A bit is the smallest unit of information understood by a computer. A bit can
take a value of 0 or 1. A byte, which is made up of 8 bits, can represent a single character, such
as the letter A.
broadband
Indicating a capacity to carry signals occupying a large portion of the electromagnetic
spectrum. A broadband communications system is capable of delivering multiple channels or
services (voice, video, and data) to its subscribers.
C
CATV
community antenna television or cable television system. A broadband communications
system capable of delivering multiple channels of programming from a centralized set of
antennas, generally by coaxial cable, to a community. Many systems now integrate
microwave and satellite links into their design.
D
dB
decibel. One tenth of a bel, the number of decibels denoting the ratio of two amounts of
power being ten times the common logarithm of this ratio.
DC
directional coupler.
dc, DC
direct current. An electric current flowing in one direction only and substantially constant in
value.
DC/EQ
directional coupler/equalizer.
decibel
A unit for expressing the relative intensity of sounds or other signals.
directional coupler (DC) module
The directional coupler module determines the tap value of the unit. The DC value is selected
for each installation to provide the proper RF level input. A tap with low loss from input to
output and relatively low loss from input to take-off port, but relatively high loss from output
to take-off port.