User Manual

Glossary B-2STRATA TX Operator’s Guide/Tech Ref Manual
BDC Block Down Converter
BER Bit Error Ratio
The ratio of bits containing errors to the total number
of bits in the signal, over a time period.
BiasT A type of interconnection between the IDU and the
ODU. In Bias T wiring, IF and DC are combined and
carried on the coax cable up the ODU; blocking
circuitry prevents the DC from entering the IDU.
BISS Basic Interoperable Scrambling System
A means of encrypting and decrypting a digital signal
to prevent unauthorized reception. The encryption
and decryption are controlled by a digital key, which
is shared at both the transmitting and receiving
location.
BISS-1 BISS encryption that uses a fixed key.
BISS-E BISS encryption that uses an encrypted key.
BNC Bayonet lock coaxial connector
BPF Band Pass Filter
bps or b/sec Bits per second
BPSK Binary Phase Shift Keying
BW Bandwidth
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
Table B-1: Useful Terms (Continued)
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.
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.
CSI Channel-State Information
CW Carrier Wave
DAB Digital Audio Broadcasting
dB Decibel
A logarithmic measurement of power or voltage,
applied to audio and RF signals.
dBm A unit of measurement referenced to one milliwatt.
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
DMUX,
DEMUX
Demultiplexer
Table B-1: Useful Terms (Continued)