Unitech MS842 Manuel d'utilisateur télécharger pdf (Page 72)

GS1 (Globe Standard 1) DataBar

GS1 DataBar Limited

GS1 DataBar Limited Security Level

The decoder offers four levels of decode security for GS1 DataBar Limited

barcodes. There is an inverse relationship between security and decoder

aggressiveness. Increasing the level of security may result in reduced

aggressiveness in scanning, so only choose the level of security necessary.

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Level 1 – No clear margin required. This complies with the original GS1

standard, yet might result in erroneous1 decoding of the DataBar Limited

barcode when scanning some UPC symbols that start with the digits “9” and “7”.

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Level 2 – Automatic risk detection. This level of security may result in erroneous

decoding of DataBar Limited barcodes when scanning some UPC symbols. If a

misdecode is detected, the decoder operates in Level 3 or Level 1.

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Level 3 – Security level reflects newly proposed GS1 standard that requires a

5X trailing clear margin.

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Level 4 – Security level extends beyond the standard required by GS1. This

level of security requires a 5X leading and trailing clear margin.

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Unitech MS842 Manuel d'utilisateur Page 72