Symbol LS 1220, Product Reference Manual

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Glossary-2
LS 1220 Product Reference Guide
Byte On an addressable boundary, eight adjacent binary digits (0 and 1)
combined in a pattern to represent a specific character or numeric value. Bits
are numbered from the right, 0 through 7, with bit 0 the low-order bit. One
byte in memory can be used to store one ASCII character.
CDRH Center for Devices and Radiological Health. A federal agency responsible
for regulating laser product safety. This agency specifies various laser
operation classes based on power output during operation.
CDRH Class 1 This is the lowest power CDRH laser classification. This class is considered
intrinsically safe, even if all laser output were directed into the eye’s pupil.
There are no special operating procedures for this class.
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 encodation 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.
CLSI Editing An option which inserts a space after the 1st, 5th, and 10th characters of a
14-character Codabar 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.