Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Installation Guide
Glossary
50
4015678 Rev B
BIOS
basic input/output system.
blanking level
The amplitude of the front and back porches of the composite video signal. The blanking level
separates the range containing picture information from the range containing synchronization
information.
separates the range containing picture information from the range containing synchronization
information.
Bps
bits per second. The total number of bits sent in a second of time.
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.
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.
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.
power being ten times the common logarithm of this ratio.
dBc
decibels relative to a reference carrier.
dBm
decibels relative to 1 milliwatt.
dBmV
decibels relative to 1 millivolt.
dBuV
decibels relative to 1 microvolt.