
M3000 Portable Bar Code Reader User's Guide
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APPENDIX I - CODE 93 SPECIFICATIONS
The Code 93 bar code symbology is a variable length alphanumeric code containing the full 128
ASCII character set. Each character is made up of 9 modules with three bars and three spaces. The
bars can be 1, 2, or 3 modules wide except for the start/stop character. The spaces can be 1, 2, 3, or
4 modules wide. Code 93 bar codes contain a mandatory two digits for data integrity.
CHARACTERISTICS
Character Set: 128 ASCII character set
Symbol Length: Variable
Check Digit: 2
Bi-directional Decoding: Yes
Maximum Density: 14.8 char./inch (using .0075 inch narrow element)
CHARACTER SET
The following tables represent Code 93 data. Table 1 defines all of the USS-93 character
assignments. Table 2 shows the full ASCII character set with the special control characters.
Table 1. USS-93 Character Assignments
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