Interleaved 2 of 5 Security Level (Parameter #1121, SSI #F8h 04h 61h)
Interleaved 2 of 5 bar codes are vulnerable to mis‑decodes, particularly when Interleaved 2 of 5 Lengths is set to Any Length. The scanner offers four levels of decode security for Interleaved 2 of 5 bar codes. There is an inverse relationship between security and scanner aggressiveness. Increasing the level of security can reduce scanning aggressiveness, so select only the level of security necessary.
- Interleaved 2 of 5 Security Level 0—allows the scanner to operate in its most aggressive state, while providing sufficient security in decoding most in-spec bar codes.
- Interleaved 2 of 5 Security Level 1—eliminates most mis-decodes. A bar code must be successfully read twice, and satisfy certain safety requirements before being decoded.
- Interleaved 2 of 5 Security Level 2—applies greater bar code security requirements if Security Level 1 fails to eliminate mis‑decodes.
- Interleaved 2 of 5 Security Level 3—if Security Level 2 is selected and mis‑decodes still occur, select this security level to apply the highest safety requirements. A bar code must be successfully read three times before being decoded.
Selecting this option is an extreme measure against mis-decoding severely out-of-spec bar codes, and significantly impairs the decoding ability of the scanner. If this level of security is required, try to improve the quality of the bar codes.
Scan one of the following bar codes to set the Interleaved 2 of 5 security level. By default, this parameter is set to Level 1.
