- 39 - © 2018 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS652 User’s Manual3.2.33 Code 128 Security LevelCode 128 bar codes are vulnerable to misdecodes, particularly when Code128 Lengths is set to Any Length. The engine offers four levels of decodesecurity for Code 128 bar codes. There is an inverse relationship betweensecurity and engine aggressiveness. Increasing the level of security canreduce scanning aggressiveness, so select only the level of securitynecessary.• Code 128 Security Level 0 - The engine operates in its most aggressivestate, while providing sufficient security indecoding most in-spec bar codes.• Code 128 Security Level 1 - This option eliminates most misdecodeswhile maintaining reasonableaggressiveness.• Code 128 Security Level 2 - This option applies greater bar codesecurity requirements if Security Level 1fails to eliminate misdecodes.• Code 128 Security Level 3 - If you selected Security Level 2, andmisdecodes still occur, select this securitylevel to apply the highest safetyrequirements.NOTE: Selecting this option is an extreme measure against mis-decoding severelyout-of-spec bar codes, and significantly impairs the decoding ability of the engine.If this level of security is required, try to improve the quality of the bar codes.
