Motorola DS3478 - Manual (Page 243)

Symbologies 13 - 71
Security Level
The digital scanner offers four levels of decode security for UPC/EAN bar codes. Select higher security levels for
lower quality bar codes. There is an inverse relationship between security and decode speed, so be sure to choose
only that level of security necessary for the application.
Security Level 0
This default setting allows the digital scanner to operate fastest, while providing sufficient security in decoding
“in-spec” UPC/EAN bar codes.
Security Level 1
As bar code quality levels diminish, certain characters become prone to misdecodes before others (i.e., 1, 2, 7, 8).
If the digital scanner is misdecoding poorly printed bar codes, and the misdecodes are limited to these characters,
select this security level.
Security Level 2
If the digital scanner is misdecoding poorly printed bar codes, and the misdecodes are not limited to characters 1,
2, 7, and 8, select this security level.
Security Level 3
If the digital scanner is still misdecoding, select this security level. Be advised, selecting this option is an extreme
measure against misdecoding severely out of spec bar codes. Selecting this level of security can significantly
impair the decoding ability of the digital scanner. If this level of security is necessary, try to improve the quality of
the bar codes.