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Glossary
Gate A device or circuit which has no output until it is triggered into operation by one
or more enabling signals, or until an input signal exceeds a predetermined
threshold amplitude.
Limiter A device or circuit whose output-signal amplitude remains at some
predetermined level in spite of wide variations of input-signal amplitude.
Limiting The restriction of the maximum peak amplitude of a signal to a designated
level.
Muting The act of preventing signal from being output.
Phase shift 1. A change in the displacement, as a function of time, of a periodic
disturbance having constant frequency. 2. The magnitude of such a change,
measured in fractions of a wavelength or in electrical degrees.
Polarity See PHASE SHIFT
QuickMAP The diagram outlining the processing components in a particular processing
setup.
QuickSET The group of component settings associated with a QuickMAP.
RS-232 A standard covering serial communications between computers and other
equipment.
Serial cable A cable used to connect between two serial ports. The connectors used are
typically DB-9, DB-25, or RJ-45.
Serial port A communications port located either on a computer or on computer
controlled equipment.
Threshold 1. The initial (observable) point of an effect, e.g., threshold of hearing. 2. A
predetermined point, such as a minimum current or voltage, for the start of
operation of a circuit or device.
Window An interval during which a circuit is gated open to permit signal sampling.
During this interval, a window is figuratively OPEN to the signal.