Ashly Power Amplifiers FET-200 - Manual (Page 12)

IMPEDANCE
Essentially the AC equivalent of resistance. It describes the drive
capability of an output, or the amount of drive required for an input at
any given signal level.
KHz
Kilohertz. 1,000 Hertz.
LEVEL
The magnitude of a signal, expressed in decxuels or volts.
LIMITER
An amplifier which reduces its gain as its input is increased beyond a
predetermined threshold. Usually used to protect audio systems against
sudden, high level signals, and possible overload.
Lliffi LEVEL
Meaning "somewhere around OdBV" as opposed to MIC level of around -40dBV.
MILLISECOND
1/lOOOtn of a second
MICROSECOND
1/1,000,000th of a second
OCTAVE
A logarithmic unit to compare frequencies. +1 Octave means double
frequency, -1 Octave means half frequency.
OHM
The unit of electrical resistance or impedance,
PHASE
Describes how well two signals are in step. In-phase means that positive
and negative peaks in two signals occur together, while out-of-phase
means they do not occur together. Variations in signal timing as well as
polarity can make two signals in or out of phase, or anywhere in between.
Phase is usually measured in degrees where 0 degrees is in-phase, 180
degrees is out-of-phase, and 90 degrees is in between (sometimes called
quadrature).
PREAMPLIFIER
The first stage of amplification, designed to boost very low level
signals to line level.
..Q..
A measurement describing the sharpness or broadness of a filter.
PvESONAiiCE
The tendency of an electrical or mechanical system to vibrate (or
oscillate) at a certain frequency.
SATURATION
The point at which the magnetic storage capability of a piece of
recording tape is exceeded.
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