Abbreviations - Orban Optimod-FM 8300 Operating Manual

OPTIMOD-FM DIGITAL

Abbreviations

Some of the abbreviations used in this manual may not be familiar to all readers:
A/D (or A to D) analog-to-digital converter
AES Audio Engineering Society
AGC automatic gain control
A-I analog input
A-O analog output
BAL balanced (refers to an audio connection with two active conductors and one shield sur-
rounding them).
BBC British Broadcasting Corporation
BNC a type of RF connector
CALIB calibrate
CIT composite isolation transformer
CMOS complementary metal-oxide semiconductor
COFDM Coded Orthogonal Frequency Division Multiplex — a robust type of digital modulation using
many narrow-bandwidth, low data rate, mutually non-interfering carriers to achieve an ag-
gregate high data rate with excellent multipath rejection.
COM serial data communications port
D/A (or D to A) digital-to-analog converter
dBm decibel power measurement. 0 dBm = 1mW applied to a specified load. In audio, the load
is usually 600. In this case only, 0 dBm = 0.775V rms.
dBu decibel voltage measurement. 0 dBu = 0.775V RMS. For this application, the dBm-into-
600 scale on voltmeters can be read as if it were calibrated in dBu.
DI digital input
DJ disk jockey, an announcer who plays records in a club or on the air
DO digital output
DOS Microsoft disk operating system for IBM-compatible PC
DSP digital signal processor (or processing). May also refer to a special type of microprocessor
optimized for efficiently executing arithmetic.
EBU European Broadcasting Union
EBS Emergency Broadcasting System (U.S.A.)
EMI electromagnetic interference
ESC escape
FCC Federal Communications Commission (USA regulatory agency)
FDNR
frequency-dependent negative resistoran element used in RC-active filters
FET field effect transistor
FFT fast Fourier transform
FIFO first-in, first-out
G / R gain reduction
HD Radio
See IBOC
HF high-frequency
HP high-pass
IBOC "In-Band On-Channel" — a form of digital radio commercialized by iBiquity Corporation
where the digital carriers use a form of COFDM modulation and share the frequency alloca-
tion of the analog carriers. Also known by its trademarked name of "HD Radio."
IC integrated circuit
IM intermodulation (or "intermodulation distortion")
I/O input/output
ITU International Telecommunications Union (formerly CCIR). ITU-R is the arm of the ITU dedi-
cated to radio.
JFET junction field effect transistor
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TECHNICAL DATA