OPTIMOD TECHNICAL DATA
6-
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
AT “advanced technology” IBM PC with 80286 or higher processor
BAL balance
BBC British Broadcasting Corporation
BNC a type of RF connector
CALIB calibrate
CIT composite isolation transformer
CMOS complementary metal-oxide semiconductor
COM serial data communications port
D/A (or D to A) digital-to-analog converter
dBm decibel power measurement. 0dBm = 1mW applied to a specified
load. In audio, the load is usually 600Ω.
dBu decibel voltage measurement. 0dBu = 0.775V RMS. For this appli-
cation, the dBm-into-600Ω 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 PC
DSP digital signal processor
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
HF high-frequency
HP high-pass
IC integrated circuit
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