- 87 - © 2018 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS652 User’s Manual3.14 Symbology-Specific SecurityFeatures3.14.1 Redundancy LevelThe engine offers four levels of decode redundancy. Select higherredundancy levels for decreasing levels of bar code quality.As redundancy levels increase, the engine’s aggressiveness decreases.Scan one of the following bar codes to select the redundancy levelappropriate for the bar code quality:• Redundancy Level 1 - The engine must read the following code typestwice before decoding:♦ Codabar (8 characters or less)♦ MSI (4 characters or less)♦ D 2 of 5 (8 characters or less)♦ I 2 of 5 (8 characters or less)• Redundancy Level 2 - The engine must read all code types twice beforedecoding.• Redundancy Level 3 - The engine must read code types other than thefollowing twice before decoding, but must readthe following codes three times:♦ Codabar (8 characters or less)♦ MSI (4 characters or less)♦ D 2 of 5 (8 characters or less)♦ I 2 of 5 (8 characters or less)• Redundancy Level 4 - The engine must read all code types three timesbefore decoding.
