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

 

Glossary 

50 

4022871 Rev C 

BW 

bandwidth. A measure of the information-carrying capacity of a communications channel, for 
example the range of usable frequencies that can be carried by a CATV system. The 
bandwidth corresponds to the difference between the lowest and highest frequency that can 
be carried by the channel. 

 

C 

C/N or CNR 

carrier-to-noise ratio. The ratio, in decibels, of the carrier to that of the noise in a receiver's IF 
bandwidth after specified band limiting and before any nonlinear process such as amplitude 
limiting and detection takes place. 

 

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, DC 

direct current. An electric current flowing in one direction only and substantially constant in 
value. 

 

distribution system 

The part of a CATV system consisting of the transmission medium (coaxial cables, fiber optic 
cables, etc.) used to carry signals from the headend system to subscriber terminals. 

 

duplexer 

A device which permits the connection of both a receiver and a transmitter to a common 
antenna. 

 

E 

EMC 

electromagnetic compatibility. A measure of equipment tolerance to external electromagnetic 
fields. 

 

EQ 

equalizer. 

 

equalization 

The process of compensating for an undesired result. For example, equalizing tilt in a 
distribution system. 

 

ESD 

electrostatic discharge. Discharge of stored static electricity that can damage electronic