Symbol SE 2223, Integration Manual

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Glossary-2
SE 2223/3223 Scan Engine Integration 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. CDRH Class I devices
are safe under reasonably foreseeable conditions of operation. Software
and other controls to limit exposure to laser light may be required to achieve
CDRH Class I operation. The CDRH time base for Class I devices is 10,000
seconds.
CDRH Class 2 CDRH Class II devices may not emit more than 1 milliwatt average radiant
power. For this scan engine, additional software controls are not necessary.
Eye protection for CDRH Class II devices is normally afforded by aversion
responses, including the blink reflex.
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.