Amplitude
Modulation
Amplitude of the high-frequency carrier varies
according to the instantaneous value of the
low-frequency modulating signal.
Baseband
The band of frequencies occupied by the
signal in a carrier before the signal is
modulated in the carrier to form the
transmitted signal.
BPF
Band Pass Filter
Bursty
Data streams that are sporadic: bursts of data
transmission interspersed with periods of little
or no activity.
BW
Bandwidth: A measure of information-carrying
capacity of a communications channel. BW is
the difference between the highest and lowest
frequencies carried by a channel. Also the
speed (bit-rate velocity at which data can be
transferred and presented.
C/N;
also CNR
Carrier-to-Noise ratio, normally expressed in
dB: the ratio of peak carrier power to root
mean square (RMS) noise power (noise floor
at video bandwidth) adjacent to the carrier.
See Noise Offset.
CATV
Community Antenna Television, commonly
used to refer to Cable Television.
Channel
In the US a 6 MHz-wide band of frequencies
allocated for use in television broadcasting,
designated by number. For example, Channel
7 occupies the band from 174 to 180 MHz.
In Europe the standard is 8 MHz
Channel Plan
Analysis and enumeration/identification of
television channels present on a CATV
system