Rockwell Automation 2755 2D Hand-Held Scanner - Manual (Page 119)

Glossary G–5
Publication 2755-6.4
D
Dead Zone
An area within a scanner’s field of view, in which specular reflection
may prevent a successful decode.
Decode
To recognize a bar code symbology (e.g., UPC/EAN) and then
analyze the content of the specific bar code scanned. To translate the
bar/space pattern into defined characters within a defined symbology.
Discrete Code
A bar code or symbol in which the spaces between characters
(intercharacter gaps) are not part of the code.
Decode Algorithm
A decoding scheme that converts pulse widths into data
representation of the letters or numbers encoded within a bar code
symbol.
Depth of Field
The range between minimum and maximum distances at which a
scanner can read a symbol with a certain minimum element width.
Discrete Code
A bar code or symbol in which spaces between characters
(intercharacter gaps) are not part of the code (e.g., Code 39).
Discrete 2 of 5
A binary bar code symbology representing each character by a group
of five bars, two of which are wide. The location of wide bars in the
group determines which character is encoded; spaces are
insignificant. Only numeric characters (0 to 9) and START/STOP
characters may be encoded.