12 - 74 MT2070/MT2090 User Guide
Redundancy Level
Parameter # 4Eh
The device offers four levels of decode redundancy. Select higher redundancy levels for decreasing levels of bar
code quality. As redundancy levels increase, the device’s aggressiveness decreases.
Select the redundancy level appropriate for the bar code quality.
Redundancy Level 1
The following code types must be successfully read twice before being decoded:
Redundancy Level 2
The following code types must be successfully read twice before being decoded:
Redundancy Level 3
Code types other than the following must be successfully read twice before being decoded. The following codes
must be read three times:
Table 12-2
Redundancy Level 1 Codes
Code Type Code Length
Codabar or less
MSI 4 characters or less
D 2 of 5 8 characters or less
I 2 of 5 8 characters or less
Table 12-3
Redundancy Level 2 Codes
Code Type Code Length
All All
Table 12-4
Redundancy Level 3 Codes
Code Type Code Length
MSI 4 characters or less
D 2 of 5 8 characters or less
I 2 of 5 8 characters or less
Codabar 8 characters or less
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