Symbol LS 4071, Product Reference Manual

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Parameter Menus
UPC/EAN Security Level (Cont’d)
UPC/EAN Security Level 2
If you are experiencing mis-decodes of poorly printed bar codes, and the mis-
decodes 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 that selecting this option is an extreme measure
against mis-decoding severely out of spec bar codes. Selection of this level of
security significantly impairs 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