Installation Guide

4035812 Rev B 25
A
ac, AC
alternating current. An electric current that reverses its direction at regularly recurring
intervals.
AC-3
audio compression - 3.
analog channel
A channel that occupies a fixed location in a 6 MHz bandwidth within the 54 MHz to 550
MHz range of the RF band. Analog video channels deliver one traditional broadcast television
channel in each 6 MHz band.
ASI
asynchronous serial interface. Allows the intermittent transfer of data one bit at a time rather
than in a steady stream.
attenuation
The difference between transmitted and received signal strength due to loss through
equipment, lines, or other transmission medium. Usually expressed in decibels.
B
baseband
The original band of frequencies occupied by the signal before it modulates the carrier
frequency to form the transmitted signal. Characteristic of any network technology that uses a
single carrier frequency and requires all stations attached to the network to participate in
every transmission.
BTSC
Broadcast Television Systems Committee. An EIA committee created to develop a standard
for Multi-channel Television Sound (MTS) broadcasting. The standard adopted was
developed by Zenith Electronics Corporation (transmission parameters) and dbx, Inc. (noise
reduction system).
C
CATV
cable television.
Glossary