Philips Speechmike6284 Configuration Manual page 88

Scan Area
Scanner
Scanning Mode
Scanning Sequence
Self-Checking Code
Space
Specular Refl ection
Start/Stop Character
Substrate
Symbol
Symbol Aspect Ratio
Symbol Height
Symbol Length
Symbology Symbology Symbology
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Area intended to contain a symbol.
An electronic device used to scan bar code symbols and produce a
digitized pattern that corresponds to the bars and spaces of the
symbol. Its three main components are:
1. Light source (laser or photoelectric cell) - illuminates a
bar code.
2. Photodetector - registers the difference in refl ected light
(more light refl ected from spaces).
3. Signal conditioning circuit - transforms optical detector
output into a digitized bar pattern.
The scanner is energized, programmed, and ready to read a bar
code.
A method of programming or confi guring parameters for a bar code
reading system by scanning bar code menus.
A symbology that uses a checking algorithm to detect encoding
errors within the characters of a bar code symbol.
The lighter element of a bar code formed by the background
between bars.
The mirror-like refl ection of light from a surface which can "blind" a
scanner.
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.
A foundation material on which a substance or image is placed.
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.
The ratio of symbol height to symbol width.
The distance between the outside edges of the quiet zones of the fi rst
row and the last row.
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.
The structural rules and conventions for representing data within a
particular bar code type (e.g. UPC/EAN, Code 39).