LS 2106 Product Reference Guide
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. |
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 A solid state device which produces visible laser light. Laser light
(VLD) | emitted from the diode has a wavelength of 670 to 680 nanometers. |
