Rjs Inspector D4000 Laser (FIRMWARE version A.05 and E User Manual Page 57

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Operators Guide Appendix I
002-5568 RJS, Minneapolis, MN
51
Appendix I (Quiet Zone Analysis)
Quiet Zone Analysis
The Laser Inspector trims data gathered during a scan to approximately 10 times the X
dimension on each side of a bar code for all symbologies except UPC and EAN. The areas
are assumed to be quiet zones and are included in the symbol analysis. If a low reflectance
object is detected in these areas, the message Warning QZ/SS is displayed. This means a
quiet zone is too narrow or the start (or stop) code may have extra elements encoded.
Quiet Zone Analysis for UPC and EAN symbols are described in the following tables. In
cases where an addendum is included in the bar code, an addendum gap analysis is also
performed.
Table I-1 (Acceptable Parameters for Symbols
Without Addendums)
Symbology Leading QZ Trailing QZ
UPC-A 9X Minimum 9X Minimum
UPC-E 9X Minimum 7X Minimum
EAN-13 11X Minimum 7X Minimum
EAN-8 7X Minimum 7X Minimum
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