Motorola LS1203 用户手册

Symbologies 8 - 47

Enable Bi-directional Redundancy to add security to linear code type security levels. When enabled, a bar code 
must be successfully scanned in both directions (forward and reverse) before reporting a good decode.

The Code 39 and Codabar symbologies have an intercharacter gap that is customarily quite small. Due to various 
bar code printing technologies, this gap may grow larger than the maximum size allowed, causing the scanner to 
be unable to decode the symbol. If this problem is encountered, scan Large Intercharacter Gaps to tolerate 
out-of-specification bar codes.