Glossary
A-3
MRX4000 PLUS
Operator’s Guide/
Technical Reference Manual
CCITT
International Telegraph and Telephone Consultative
Committee
A telecommunications standardizing committee of
the ITU.
CCPS
Command & Control Power Supply
CENELEC
European Committee for Electrotechnical
Standardization
CNR
Carrier-to-Noise Ratio
COFDM
Coded Orthogonal Frequency Division Multiplexing
Composite
(Baseband)
A band or grouping of frequencies and/or subcarriers,
including video, occupied by the signal in a radio
transmission system. Also called Baseband.
Co-channel
interference
Interference caused by two video transmitters
broadcasting on the same channel of the same
frequency (for example, on channel 2 in the 2 GHz
band).
CR4
Code Runner 4
Crossover
cable
A Category 5 (CAT5) network cable used to connect
two computers. The cable crosses over (reverses)
pins 1 and 3 and pins 2 and 6 of the cable’s RJ-45
connectors. The transmitter (TX) pins are therefore
connected to the corresponding receiver (RX) pins,
plus to plus and minus to minus.
CSI
Channel-State Information
CV
Composite Video
Video signal in which the chrominance (color) and
luminance (brightness) information are combined in
one signal. S-Video separates the chrominance and
luminance into individual signals.
CW
Carrier Wave
Table A-1: Useful Terms (Continued)
DAB
Digital Audio Broadcasting
dB
Decibel
A logarithmic measurement of power or voltage,
applied to audio and RF signals.
dBm
A measure of RF signal strength defined as “decibels
relative to one milliwatt (mW).” A 1 mW signal has a
signal strength of 0 dBm. A signal weaker than 1 mW
has a negative dBm value, and a signal stronger than
1 mW has a positive dBm value.
DCC
Distribution Command and Control
DCE
Data Communications Equipment
A device that communicates with a DTE device. In
practical terms, the DCE is usually a modem and the
DTE device is usually a computer.
De-
emphasis
Reducing the amplitude of high frequency
components of an analog audio signal. Done on the
receive end of an analog link to take out emphasis
added on the transmit side.
DFT
Discrete Fourier Transform
DHCP
Dynamic Host Configuration Protocol
A protocol for automating the configuration of
computers that use TCP/IP.
DMUX,
DEMUX
Demultiplexer
DQPSK
Differential Quadrature (Quaternary) Phase-Shift
Keying
DRL
Data Return Link
Table A-1: Useful Terms (Continued)
Summary of Contents for MRX4000 PLUS
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