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Advanced Scanner Configuration Guide
Revision: 2.0 , technical changes excepted
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.
CLSI Editing
An option which inserts a space after the 1st, 5th, and 10th characters of a 14-
characterCodabar symbol. Length includes start and stop characters.
Codabar
A discrete self-checking code with a character set consisting of digits 0 to 9 and six
additional characters: ( - $ : / , +).
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 93
An industrial symbology compatible with Code 39 but offering a full character ASCII
set and a higher coding density than Code 39.
Code Length
Number of data characters in a bar code between the start and stop characters,
not including those characters.
Continuous Code
A bar code or symbol in which all spaces within the symbol are parts of characters.
There are no intercharacter gaps in a continuous code. The absence of gaps
allows for greater information density.
CTS
Clear to send.
Dead Zone
An area within a scanner's field of view, in which specular reflection may prevent a
successful decode.
Decode
To recognize a bar code symbology (e.g., UPC/EAN) and then analyze the content
of the specific bar code scanned.
Decode Algorithm
A decoding scheme that converts pulse widths into data representation of the
letters or numbers encoded within a bar code symbol.
Depth of Field
The range between minimum and maximum distances at which a scanner can read
a symbol with a certain minimum element width.
Digitized Bar Pattern(DBP)
A digital representation of a decoded bar code.
Discrete 2 of 5
A binary bar code symbology representing each character by a group of five bars,
two of which are wide. The location of wide bars in the group determines which
character is encoded; spaces are insignificant. Only numeric characters (0 to 9)
and START/STOP characters may be encoded.
Discrete Code
A bar code or symbol in which the spaces between characters (intercharacter
gaps) are not part of the code.
EAN
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.
