15 - 30 DS6878 Product Reference Guide
Code 128 Security Level
Parameter # 751
Code 128 bar codes are vulnerable to misdecodes, particularly when Code 128 Lengths is set to Any Length.
The digital scanner offers four levels of decode security for Code 128 bar codes. There is an inverse
relationship between security and digital scanner aggressiveness. Increasing the level of security can reduce
scanning aggressiveness, so select only the level of security necessary.
•
Code 128 Security Level 0: This setting allows the digital scanner to operate in its most aggressive
state, while providing sufficient security in decoding most in-spec bar codes.
•
Code 128 Security Level 1: A bar code must be successfully read twice, and satisfy certain safety
requirements before being decoded. This default setting eliminates most misdecodes.
•
Code 128 Security Level 2: Select this option with greater bar code security requirements if Security
Level 1 fails to eliminate misdecodes.
•
Code 128Security Level 3: If you selected Security Level 2, and misdecodes still occur, select this
security level to apply the highest safety requirements. A bar code must be successfully read three times
before being decoded.
NOTE Selecting this option is an extreme measure against mis-decoding severely out-of-spec bar codes.
Selecting this level of security significantly impairs the decoding ability of the digital scanner. If this level of
security is required, try to improve the quality of the bar codes.
Code 128Security Level 0
(0)
*Code 128 Security Level 1
(1)
Code 128 Security Level 2
(2)
Code 128 Security Level 3
(3)
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