Symbol MK2200 MicroKiosk, Product Reference Manual

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Glossary - 2 MK2200 MicroKiosk for CE .NET 4.2 Product Reference Guide
Baud Rate. A measure of the data flow or number of signaling events occurring per second.
When one bit is the standard "event," this is a measure of bits per second
(bps). For example, a baud rate of 50 means transmission of 50 bits of data
per second.
Bit. Binary digit. One bit is the basic unit of binary information. Generally, eight
consecutive bits compose one byte of data. The pattern of 0 and 1 values
within the byte determines its meaning.
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.
BOOTP. A protocol for remote booting of diskless devices. Assigns an IP address to a
machine and may specify a boot file. The client sends a bootp request as a
broadcast to the bootp server port (67) and the bootp server responds using
the bootp client port (68). The bootp server must have a table of all devices,
associated MAC addresses and IP addresses.
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.