Motorola MT2070 Specifications download pdf (Page 199)

Glossary - 3

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 is 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 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 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.

Cold Boot. A cold boot restarts a device and erases all user stored records and entries.

COM Port. Communication port; ports are identified by number, e.g., COM1, COM2.

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.

Cradle. A cradle is used for charging the terminal battery and for communicating with a host computer, and provides a

storage place for the terminal when not in use.

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Motorola MT2070 Specifications Page 199