Reference Guide

Symbologies
242
Code 128 Security Level
Parameter # 751 (SSI # F1h EFh)
Code 128 barcodes 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 barcodes. 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 barcodes.
• Code 128 Security Level 1: A barcode 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 barcode security requirements if
Security Level 1 fails to eliminate misdecodes.
• Code 128 Security Level 3: If you selected Security Level 2, and misdecodes still occur, select this
security level to apply the highest safety requirements. A barcode must be successfully read three
times before being decoded.
note Selecting this option is an extreme measure against mis-decoding severely out-of-spec barcodes.
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 barcodes.
Code 128Security Level 0
(0)
*Code 128 Security Level 1
(1)
Code 128 Security Level 2
(2)
Code 128 Security Level 3
(3)
guide-user-color-8.5x11.book Page 242 Monday, June 1, 2020 5:43 PM
Draft v 10