Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Installation Guide

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4015678 Rev B 
49
 
ampere. A unit of measure for electrical current. 
 
ac, AC 
alternating current. An electric current that reverses its direction at regularly recurring 
intervals. 
 
AFC 
automatic frequency control. An arrangement whereby the tuning of a circuit is automatically 
maintained within specified limits with respect to a reference frequency. 
 
AGC 
automatic gain control. A process or means by which gain is automatically adjusted in a 
specified manner as a function of input level or other specified parameters. 
 
attenuation 
The difference between transmitted and received signal strength due to loss through 
equipment, lines, or other transmission medium. Usually expressed in decibels. 
 
attenuator 
A passive device designed to reduce signal strength without distorting the waveform. 
Usually specified in dB. 
 
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. 
 
baud (Bd) 
A measure of signaling rate based on the number of signaling events per unit of time. 
 
Glossary