Zebra DS457 Series User Manual

12 - 84 DS457-XX20004ZZWW Fixed Mount Imager Integration Guide
GS1 DataBar Limited Margin Check
Parameter # 728 (SSI # F1h D8h)
The imager offers four levels of decode security for GS1 DataBar Limited bar codes. There is an inverse
relationship between the level of margin check and imager aggressiveness. Increasing the level of margin
check can reduce scanning aggressiveness, so select only the level of margin check necessary.
• Margin Check Level 1 – No clear margin required. This complies with the original GS1 standard, yet can
result in erroneous decoding of a DataBar Limited bar code when scanning some UPC symbols that start
with digits 9 and 7.
• Margin Check Level 2 – Automatic risk detection. This level of margin check can result in erroneous
decoding of DataBar Limited bar codes when scanning some UPC symbols. If a misdecode is detected,
the imager operates in Level 3 or Level 1.
• Margin Check Level 3 – Margin check level reflects the newly proposed GS1 standard that requires a
five times trailing clear margin.
• Margin Check Level 4 – Security level extends beyond the standard required by GS1. This level of
margin check requires a five times leading and trailing clear margin.
GS1 DataBar Limited Margin Check Level 1
(1)
GS1 DataBar Limited Margin Check Level 2
(2)
*GS1 DataBar Limited Margin Check Level 3
(3)
GS1 DataBar Limited Margin Check Level 4
(4)

Zebra DS457 Series Specifications

General

Brand	Zebra
Model	DS457 Series
Category	Barcode Reader
Language	English