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MC3000 User GuideGL-4
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.
Dead Zone An area within a scanner's field of view, in which specular
reflection may prevent a successful decode.
Decode To recognize a bar code symbology (e.g., UPC/EAN) and
then analyze the content of the specific bar code scanned.
Decode Algorithm A decoding scheme that converts pulse widths into data
representation of the letters or numbers encoded within a
bar code symbol.
Decryption Decryption is the decoding and unscrambling of received
encrypted data. Also see, Encryption and Key.
Depth of Field The range between minimum and maximum distances at
which a scanner can read a symbol with a certain minimum
element width.
Discrete Code A bar code or symbol in which the spaces between
characters (intercharacter gaps) are not part of the code.
Discrete 2 of 5 A binary bar code symbology representing each character
by a group of five bars, two of which are wide. The location
of wide bars in the group determines which character is
encoded; spaces are insignificant. Only numeric characters
(0 to 9) and START/STOP characters may be encoded.
EAN European Article Number. This European/International
version of the UPC provides its own coding format and
symbology standards. Element dimensions are specified
metrically. EAN is used primarily in retail.
Element Generic term for a bar or space.
Encoded Area Total linear dimension occupied by all characters of a code
pattern, including start/stop characters and data.
ESD Electro-Static Discharge
ESN Electronic Serial Number. The unique hardware number
associated with a cellular device, which is transmitted to
the system when the device communicates with the
cellular system.
Ethernet Ethernet communication port. Allows a wired interface to a
radio network.
Flash Memory Flash memory is nonvolatile, semi-permanent storage that
can be electronically erased in the circuit and
reprogrammed. Mobile computers may use Flash memory
to store the operating system (ROM-DOS), the terminal
emulators, and the Citrix ICA Client for DOS.
FTP See File Transfer Protocol.