Symbol LS4000P Series, Product Reference Manual

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Glossary-3
Glossary
CTS Clear to send.
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.
Decoder
Asynchronous Serial
Interface (DASI) A half-duplex asynchronous serial interface with two hardware handshaking
lines.
Depth of Field The range between minimum and maximum distances at which a scanner can
read a symbol with a certain minimum element width.
Digitized Bar Pattern
(DBP) A digital representation of a decoded bar 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.
Discrete Code A bar code or symbol in which the spaces between characters (intercharacter
gaps) are not part of the code.
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.
Host Computer A computer that serves other terminals in a network, providing such services
as computation, database access, supervisory programs, and network control.
IEC International Electrotechnical Commission. This international agency
regulates laser safety by specifying various laser operation classes based on
power output during operation.
IEC (825) Class 1 This is the lowest power IEC laser classification. Conformity is ensured
through a software restriction of 120 seconds of laser operation within any
1000-second window and an automatic laser shutdown if the scanner's
oscillating mirror fails.
Intercharacter Gap The space between two adjacent bar code characters in a discrete code.