14 Glossary
A
ACR (Advanced Code Reconstruction)
This powerful code reconstruction technology
considerably increases the code reading
capability in the case of damaged or very tilted
barcodes.
Aperture
Term used on the required CDRH warning labels to
describe the laser exit window.
B
Barcode
A pattern of variable-width bars and spaces that
represents alphanumeric data in machine-
readable form. The general format of a barcode
symbol consists of a leading margin, start
character, data or message character, check
character (if any), stop character, and trailing
margin. Within this framework, each recognizable
symbology uses its own unique format.
Barcode Label
A label that carries a barcode and can be affixed
to an article.
Baud Rate
A unit used to measure communications speed or
data transfer rate.
C
CDRH (Center for Devices and Radiological
Health)
This organization (a service of the Food and Drug
Administration) is responsible for the safety
regulations governing acceptable limitations on
electronic radiation from laser devices. Banner
devices are in compliance with the CDRH
regulations.
Code Positioning
Variation in code placement that affects the ability
of a scanner to read a code. The terms Pitch,
Skew, and Tilt deal with the angular variations of
code positioning in the X, Y and Z axes. Variations
in code placement affect the pulse width and
therefore the decoding of the code. Pulse width is
defined as a change from the leading edge of a bar
or space to the trailing edge of a bar or space over
time. Pulse width is also referred to as a
transition. Tilt, pitch, and skew affect the pulse
width of the code.
D
Decode
The process of translating a barcode into data
characters using a specific set of rules for each
symbology.
Decoder
As part of a barcode reading system, the
electronic package that receives the signals from
the scanner, performs the algorithm to interpret
the signals into meaningful data, and provides the
interface to other devices. The decoder is normally
integrated into the scanner.
E
EAN
European Article Number System. The
international standard barcode for retail food
packages.
F
FLASH
An on-board non-volatile memory chip.
Full Duplex
Simultaneous, two-way, independent transmission
in both directions.
H
Half Duplex
Transmission in either direction, but not
simultaneously.
Host
A computer that serves other terminals in a
network, providing services such as network
control, database access, special programs,
supervisory programs, or programming languages.
TCNM AD/EX Barcode Scanner
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