HP Point of Sale rp5000 HP USB Barcode Scanner Programming Reference Guide - Page 30
spec bar codes. Selection of this level of security may
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Symbologies UPC/EAN Security Level 2 If you are experiencing misdecodes of poorly printed bar codes, and the misdecodes are not limited to characters 1, 2, 7, and 8, select this security level. UPC/EAN Security Level 2 UPC/EAN Security Level 3 If you have tried Security Level 2, and are still experiencing misdecodes, select this security level. Be advised, selecting this option is an extreme measure against misdecoding severely out of spec bar codes. Selection of this level of security may significantly impair the decoding ability of the scanner. If this level of security is necessary, you should try to improve the quality of your bar codes. UPC/EAN Security Level 3 2-22 Programming Reference Guide
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Programming Reference Guide
Symbologies
UPC/EAN Security Level 2
If you are experiencing misdecodes of poorly printed bar codes,
and the misdecodes are not limited to characters 1, 2, 7, and 8,
select this security level.
UPC/EAN Security Level 2
UPC/EAN Security Level 3
If you have tried Security Level 2, and are still experiencing
misdecodes, select this security level. Be advised, selecting this
option is an extreme measure against misdecoding severely out of
spec bar codes. Selection of this level of security may
significantly impair the decoding ability of the scanner. If this
level of security is necessary, you should try to improve the
quality of your bar codes.
UPC/EAN Security Level 3