- 47 - © 2018 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS652 User’s Manual3.3.10 Code 39 Security LevelThe engine offers four levels of decode security for Code 39 bar codes.There is an inverse relationship between security and engineaggressiveness. Increasing the level of security can reduce scanningaggressiveness, so select only the level of security necessary..• Code 39 Security Level 0: The engine operates in its most aggressivestate, while providing sufficient security indecoding most in-spec bar codes.• Code 39 Security Level 1: This default setting eliminates mostmisdecodes.• Code 39 Security Level 2: This option applies greater bar code securityrequirements if Security Level 1 fails toeliminate misdecodes.• Code 39 Level 3: If you selected Security Level 2, and misdecodes stilloccur, select this security level to apply the highestsafety requirements.NOTE Selecting this option is an extreme measure against mis-decoding severely out-of-specbar codes, and significantly impairs the decoding ability of the engine. If this level ofsecurity is required, try to improve the quality of the bar codes.
