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
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.
CCW
counterclockwise.
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.
dBm
decibels relative to 1 milliwatt.
dBmV
decibels relative to 1 millivolt.
dBuV
decibels relative to 1 microvolt.
dBW
decibels relative to 1 watt.
DC
directional coupler.
dc, DC
direct current. An electric current flowing in one direction only and substantially constant in
value.
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