Glossary
A-2
MRX4000 PLUS
Operator’s Guide/
Technical Reference Manual
A & C
Alarm and Control
ACU
AC to DC Converter Unit
ADPCM
Adaptive Differential Pulse Code Modulation
AES
Audio Engineering Society
AES/EBU
Unofficial name for a digital audio standard
developed as a joint enterprise of the AES and the
EBU.
AFC
Automatic Frequency Control
AGC
Automatic Gain Control
AIS
Alarm Indication Signal (all one’s)
AMI
Alternate Mark Inversion, line code format for traffic
data.
AVG
Average
ASI
Asynchronous Serial Interface
A serial communications interface operating up to
270 Mbit/sec. Generally used in field news-gathering
operations.
ASYNC
Asynchronous
Digital communication in which there is no timing
requirement for transmission and in which the start of
each character is individually signaled by the
transmitting device.
ATSC
Advanced Television Systems Committee
The group that developed the ATSC digital television
standard for the US and other countries.
Table A-1: Useful Terms (Continued)
Baseband
A composite signal in which video and audio signals
are combined together, with video occupying
approximately 0-4.5 MHz and audio modulated onto
subcarriers in the 5-6 MHz range.
BB
Baseband
BDC
Block Downconverter
BER
Bit Error Ratio
The Bit Error Rate is the percentage of bits that have
errors relative to the total number of bits in the signal.
The rate is an indication of how often a packet or
other data unit has to be retransmitted because of an
error.
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
Table A-1: Useful Terms (Continued)
Summary of Contents for MRX4000 PLUS
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