Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 345)

Glossary G–4
Publication 2755-833
E
EAN
Acronym for European Article Numbering System, the international
standard bar code for retail food packages.
element
1) A single binary position in a character. 2) Dimensionally the
narrowest width in a character, bar or space.
encoded area
The total linear dimension consisting of all the characters of a code
pattern, including start/stop characters and data.
G
guard bars
The bars at the ends and center of a UPC and EAN symbol. They
ensure a complete scan of the bar code.
H
helium neon laser
The type of laser most commonly used in bar code scanners.
Because the laser beam is bright red, bars must not be printed with
red ink. The bars would be indistinguishable from the background.
hex
Abbreviated form of the word hexadecimal. See hexadecimal.
hexadecimal numbering system.
A base-16 numbering system that uses the symbols 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, A, B, C, D, E, F.
host
(1) A central controlling computer in a network system. (2) Any
device on a network system that provides a controlling function to
another device on the network. (3) Any intelligent device for which
another device is providing a communication interface to a network.
host port
Serial port supporting RS-232, RS-422, RS-485 communications
interfaces through which a device can control the operation of the
decoder and receive decoded information.
I
Independent Mode
A scanner mode in which each scanner operates independently of the
other.