Abbreviations - Orban OPTIMOD 6300 Operating Manual

OPTIMOD 6300 DIGITAL
rent-limited, the fuse will usually open only if the power supply fails. Be sure to dis-
connect your Optimod from AC power before replacing the fuse!
Because of safety and EMI suppression requirements in the power supply, there are
no user-serviceable parts in it. In case of failure, replace the entire supply with an
Orban-supplied replacement (Orban part number 29270.000.01.1), which ensures
that your Optimod will continue to meet all regulatory requirements for safety and
emissions.

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
6-11
TECHNICAL DATA