Motorola Symbol LS4278 User Manual page 402

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GL-6
Symbol LS4278 Product Reference Guide
EAN
EAN/U.P.C.
Element
Encoded Area
Encryption
Error Correction
Error Detection
Error-Correction Characters
Error-Correction Level
Error-Detection Characters
Fixed Beam Bar Code Reader
GS1 DataBar
Guard Bars
Horizontal Bar Code
European Article Number. This European/international
version of the UPC provides its own coding format and
symbology standards. Element dimensions are specified
metrically. EAN is used primarily in retail.
A fixed-length, numeric 13-digit bar code symbol consisting
of 30 dark elements and 29 intervening light elements. Each
character is represented by 2 bars and 2 spaces over 7
modules. A bar may be comprised of 1, 2, 3 or 4 modules.
Each EAN/U.P.C. symbol consists of a leading quiet zone, a
start pattern, 7 left-hand data characters, a center bar
pattern, 5 right-hand data characters, a Modulo 10 check
character, a stop pattern and a trailing quiet zone. U.P.C. is
often considered a 12-digit code. The 13th digit of EAN/
U.P.C. symbol is a derived character in the left-most
position. In the case of U.P.C., this derived left-most
character is a 0.
Generic term for a bar or space.
Total linear dimension occupied by all characters of a code
pattern, including start/stop characters and data.
Encryption is the scrambling and coding of data, typically
using mathematical formulas called algorithms, before
information is transmitted over any communications link or
network. A key is the specific code used by the algorithm to
encrypt or decrypt the data.
A reader or decoder's use of mathematical schemes to
reconstruct or replace damaged or missing symbol
characters to enable the reading of the symbol data.
This occurs when error-correction characters detect that
the presence of errors in the symbol exceeds the error
correction capacity, and keeps the symbol from being
decoded as erroneous data.
Symbol characters used for error correction and detection,
calculated automatically from the other symbol characters.
An indicator of the number of characters used in a
symbology for error correction. A higher level of error
correction allows for correcting greater potential symbol
damage.
Symbol characters reserved for error detection that are
calculated automatically from the other symbol characters.
A scanning device where scanning motion is achieved by
moving the object relative to the reader; as opposed to a
moving beam reader.
Formerly RSS (Reduced Space Symbology): A family of
space efficient symbologies developed by UCC.EAN.
Bars located at both ends and the center of a UPC and EAN
symbol to provide reference points for scanning.
A bar code or symbol with an overall length dimension that
is parallel to the horizon, which resembles a picket fence.

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