Rice Lake Motorola DS457 Laser Scanner - Manual (Page 416)

Glossary - 6 DS457 Fixed Mount Imager Integration Guide
RS-232.
An Electronic Industries Association (EIA) standard that defines the connector, connector pins, and signals
used to transfer data serially from one device to another.
S
Scan Area.
Area intended to contain a symbol.
Scanning Mode.
The scanner is energized, programmed and ready to read a bar code.
Scanning Sequence.
A method of programming or configuring parameters for a bar code reading system by scanning
bar code menus.
SDK.
Software Development Kit
Self-Checking Code.
A symbology that uses a checking algorithm to detect encoding errors within the characters of a
bar code symbol.
Shared Key.
Shared Key authentication is an algorithm where both the AP and the MU share an authentication key.
Space.
The lighter element of a bar code formed by the background between bars.
Specular Reflection.
The mirror-like direct reflection of light from a surface, which can cause difficulty decoding a bar
code.
Start/Stop Character.
A pattern of bars and spaces that provides the scanner with start and stop reading instructions
and scanning direction. The start and stop characters are normally to the left and right margins of a horizontal code.
Substrate.
A foundation material on which a substance or image is placed.
Symbol.
A scannable unit that encodes data within the conventions of a certain symbology, usually including start/stop
characters, quiet zones, data characters and check characters.
Symbol Aspect Ratio.
The ratio of symbol height to symbol width.
Symbol Height.
The distance between the outside edges of the quiet zones of the first row and the last row.
Symbol Length.
Length of symbol measured from the beginning of the quiet zone (margin) adjacent to the start
character to the end of the quiet zone (margin) adjacent to a stop character.
Symbology.
The structural rules and conventions for representing data within a particular bar code type (e.g. UPC/EAN,
Code 39, PDF417, etc.).
T
Terminal Emulation.
A “terminal emulation” emulates a character-based mainframe session on a remote
non-mainframe terminal, including all display features, commands and function keys.
Tolerance.
Allowable deviation from the nominal bar or space width.