Symbol LS 2106 Product Reference Manual page 33

Decode Redundancy
Use this parameter to indicate whether the scanner must read a bar code one time (Level 0),
two times (Level 1) or three times (Level 2) before decoding it. A higher level of redundancy
ensures the accuracy of a decode in, for example, poor quality symbols.
LEVEL 0
LEVEL 1
LEVEL 2
Parameter Menus
4-13