
Glossary-6
LS 1220 Product Reference Guide
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.
Self-Checking Code A symbology that uses a checking algorithm to detect encoding errors within
the characters of a bar code symbol.
Space
The lighter element of a bar code formed by the background between bars.
Specular Reflection
The mirror-like reflection of light from a surface which can “blind” a scanner.
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).
Tolerance
Allowable deviation from the nominal bar or space width.
TxD
Transmitted data.
UPC
Universal Product Code. A relatively complex numeric symbology. Each
character consists of two bars and two spaces, each of which can be any of
four widths. The standard symbology for retail food packages in the United
States.
Visible Laser Diode
(VLD)
A solid state device which produces visible laser light. Laser light emitted
from the diode has a wavelength of 670 to 680 nanometers.
Summary of Contents for LS 1220
Page 2: ...LS 1220 Product Reference Guide ...
Page 3: ......
Page 4: ...LS 1220 Product Reference Guide 70 12072 03 Revision A January 2003 ...
Page 23: ...1 8 LS 1220 Product Reference Guide Figure 1 3 LS 1220 Connector ...
Page 33: ...2 10 LS 1220 Product Reference Guide ...
Page 71: ...8 14 LS 1220 Product Reference Guide Figure 8 1 Hardware Handshaking ...
Page 97: ...9 6 LS 1220 Product Reference Guide Code Lengths cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 105: ...9 14 LS 1220 Product Reference Guide Prefix Suffix Values cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 108: ...9 17 Parameter Menus UPC Security Zone cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 120: ...9 29 Parameter Menus Intercharacter Delay cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 133: ......
Page 134: ......