beautypg.com

Telex Integrated Signal Processor ISP-100 User Manual

Page 125

background image

A-3

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.