OPTIMOD-FM DIGITAL
TECHNICAL DATA
6-13
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
Summary of Contents for 8300J
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Page 262: ...6 44 TECHNICAL DATA ORBAN MODEL 8300 8300 POWER SUPPLY PARTS LOCATOR...
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