Ashly FET-200 - Definition of Terms

DEFINITION OF TERMS AS USED IN THIS MANUAL
ACTIVE
ectronic circuits which use devices such as transistors and
c rcuits, and which are capable of voltage and power gain as
OSS. xrcuits using only resistors, capacitors, transformers,
referred to as passive.
integrated
well as
etc., are
AMPLITUDE
voltage level of a signal. May be measured in volts or decibels,
era y corresponds to the volume or intensity of an audio signal.
BALAfJCED
^ circuit arrangement in which two conductors are designated as
signa ~)» and the third is a shield and chassis ground. The
sigua ines are of opposite polarity at any given moment, and are of
equal potential with respect to ground, balanced input amplifiers are
use on a Ashly SC series products^to improve hum and noise rejection,
umpering signal minus (—) to ground provides an unbalanced input.
BREATHING
A usually undesirable fluctuation of background noise
compressor action. (Also called "Pumping.”)
resulting
from
BUTTERWORTH
f particular filter response shape. The response is
ssentially flat within the pass-band, is 3dB down at the cutoff
frequency, and continues to attenuate at a constant slope. Also called a
maxima y t at or critically damped” filter shape, it is very popular
for crossovers and shelving filters.
CENTER FREQUENCY
The frequency (or
parametric equalizer
boost/cut control has
pitch) at which a filter is most effective. In a
» it refers to the frequency where a particular
maximum effect.
COMPRESSOR
An amplifier wliich reduces
predetermined "threshold."
its gain as its input is increased
beyond a
DAMPING
A force which opposes the tendency of a system to oscillate,
dB
A unit by wnich audio levels can be COMPARED. Often thoroughly
misun erstood are the concepts that decibels represent the level of a
signal compared to some reference level (15 dB cut means a certain level
ess an a previous level the absolute level of the signal need not
decibels are a logarithmic unit. Some handy numbers
to remember when dealing with decibels;
+3 dB - Double Power +10 dB = lOX Power
+6 dB - Double Amplitude, +20 dB = lOX Amplitude, lOOX Power
Quadruple Power
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