OUTLINE FOR PRODUCT REFERANCE MANUAL
Z-3070 CCD BARCODE SCANNER
Scanning mode The scanner is energized, programmed, and ready to
read a bar code.
Space
The lighter element of a bar code formed by the
background between bars.
Speculum
Reflection
The mirror-like direct reflection of light from a surface,
which can cause difficulty decoding a barcode.
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.
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 zones (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).
Tolerance
Allowable deviation from the nominal bar or space
width.
UPC
Universal Product Code. A relatively complex
numeric symbology. Each character consists of two
bars and two spaces, each of which is any of four
widths. The standard symbology for retail food
packages in the United States.
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