Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Glossary
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
CCW
counterclockwise.
CF
continuous feed.
CW
continuous wave.
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.
diplex filter
A filter which divides the frequency spectrum into a high frequency segment and a low
frequency segment so that two different signals can be sent down the same transmission path.
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.
DPU
digital processing unit.
E
EC
European Community.
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