Welch Allyn SCANTEAM 3700 Wedge, Техническое руководство

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SCANTEAM 3700 Wedge Technical Manual
Glossary
AIM- is the Automatic Identification Manufacturers, Inc. AIM is an industry
organization that supports the application of all varieties of automatic
identification technology including bar codes. An important contribution has been
AIM's efforts to standardize bar code symbologies and the way they are identified
in data communication.
Algorithm- is a finite set of rules to solve a problem in a measurable number of
steps. It is a predetermined numerical calculation which is permanently
programmed into the data system's memory to provide a desired result (bar code
decoding, for example).
Ambient Light Immunity- describes the ability of a scanner to maintain its
specified scanning ability in the presence of external light sources. Usually,
scanners are specified for incandescent, florescent, and sunlight.
Analog- (used in contrast to Digital) describes a signal whose amplitude is
directly proportional to the physical factors responsible for the signal. An example
of this is an optical sensor's output depicting the bars and spaces of a bar code as it
sees" it.
ASCII- is an acronym for the American Standard Code for Information
Interchange. It is a data communications protocol for data transmission between
an originating and a destination interface. 128 coded characters are included,
comprising 96 noncommunications data characters and 32 control characters. It
should be noted that most bar code symbologies are unable to encode the full
ASCII set.
Asynchronous Serial Communication- is a form of data communication
transmission which occurs without a regular or predictable time relationship. The
transmission of data characters is one at a time.
Autodiscriminates- refers to the ability of the SCANTEAM 3700 to recognize
and decode multiple bar code symbologies.
Bar code- is an array of parallel bars and spaces arranged in a predetermined
pattern to represent data elements called characters.
Baud Rate- is a means of expressing data transmission speed, where baud"
equals the number of signal events per second (roughly equivalent to bits per
second).
Beam Velocity- is the speed of a laser's scanning beam on the target.
Bidirectional- refers to the ability of a scanner to scan a bar code in either a
left-to-right or right-to-left direction.