Symbol LS3478-ER, Справочное руководство

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Glossary GL-3
Class 2 Bluetooth Standard for Bluetooth radio that restricts the transmission
range to 10m in order to reduce the effect of the radio on
neighboring wireless systems.
Byte A sequential series of bits comprising one character and
handled as one unit. Usually encoded in the ASCII format, a
byte usually consists of eight bits and represents one
alphabetic or special character, two decimal digits or eight
binary bits.
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 A set of unambiguous rules specifying the way in which
data may be represented as numbers and letters used to
represent information.
Code 11
A high density numeric symbology requiring a checksum for
calculation. The Code 11 character set consists of bar code
symbols representing the numbers 0-9, a dash symbol, the
start character, and the stop character.
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.