WLS 8400 Product Reference Guide
GL-4
CDRH Class 2 No additional software mechanisms are needed to
conform to this limit. Laser operation in this class
poses no danger for unintentional direct human
exposure.
Character A pattern of bars and spaces which either directly
represents data or indicates a control function, such as
a number, letter, punctuation mark, or
communications control contained in a message.
Character Set Those characters available for encoding in a
particular bar code symbology.
Check Digit A digit used to verify a correct symbol decode. The
scanner inserts the decoded data into an arithmetic
formula and checks that the resulting number
matches the encoded check digit. Check digits are
required for UPC but are optional for other
symbologies. Using check digits decreases the
chance of substitution errors when a symbol is
decoded.
Codabar A discrete self-checking code with a character set
consisting of digits 0 to 9 and six additional
characters: ( - $ : / , +).
Code A set of unambiguous rules specifying the way in
which data may be represented as numbers and letters
used to represent information.
Code 128 A high density symbology which allows the
controller to encode all 128 ASCII characters without
adding extra symbol elements.
Code 3 of 9 (Code 39) A versatile and widely used alphanumeric bar code
symbology with a set of 43 character types, including
all uppercase letters, numerals from 0 to 9, and 7
special characters (- . / + % $ and space). The code
name is derived from the fact that 3 of 9 elements
representing a character are wide, while the
remaining 6 are narrow.
Code 49 This symbol is a stack of 2 to 8 rows. Each row
encodes row count information plus data characters.
For more information, go to the AIM web site or the
ANSI web site (see Stacked Symbol (2D Symbols)).