Check Digit Verification - Psion Teklogix Omnii XT10 User Manual

Appendix C: Bar Code Settings
Decoded (Internal) Scanners
Code 39
Choosing One discrete length allows you to decode only those codes containing a selected
length. Choosing Two discrete lengths allows you to decode only those codes containing two
selected lengths. Length within a range allows you to decode a code type within a specified
range from 2 to 55.

Check Digit Verification

When this parameter is enabled, the integrity of a "Code 39" symbol is checked to ensure
that it complies with specified algorithms.
Note: Only those "Code 39" symbols that include a MOD 43 check digit are decoded
when this parameter is enabled.
Transmit Check Digit
If the check digit is to be transmitted with the data, this parameter must be enabled.
Full ASCII
If this parameter is enabled, the characters +, %, and / are used as escape characters. The
combination of an escape character and the next character is converted to an equivalent
ASCII character.
Decode Performance
If this parameter is enabled, one of three decode levels can be chosen in the Decode Perfor-
mance Level parameter.
Decode Perf. Level
This parameter provides three levels of decode performance or "aggressiveness" for Code
39 symbols. Increasing the performance level reduces the amount of required bar code ori-
entation—this is useful when scanning very long and/or truncated bar codes. Keep in mind
that increased levels reduce decode security.
When you double-tap on this parameter, a dialog box is displayed in which you can enter a
decode performance level of between 1 and 3.
Psion Teklogix Omnii XT10 Hand-Held Computer User Manual C-13