Rockwell Automation 2755 2D Hand-Held Scanner - Manual (Page 125)

Glossary G–11
Publication 2755-6.4
Programming Mode
The state in which a scanner is configured for parameter values.
Q
Quiet Zone
A clear space, containing no dark marks, which precedes the start
character of a bar code symbol and follows the stop character.
R
Reflectance
Amount of light returned from an illuminated surface.
Resolution
The narrowest element dimension which can be distinguished by a
particular reading device or printed with a particular device or
method.
Row Indicators
To help synchronize a PDF417 symbol’s structure, codewords which
collectively indicate which row a particular one is, which is the left
and right side of that row, how many rows are in the symbol, what
security level is encoded in the symbol, and how many data columns
are in the rows. Left Row Indicators occur in each row immediately
after the Start pattern; Right Row Indicators occur in each row
immediately after the Stop pattern.