The data in a Code 39 may not contain the checksum code. If there is, the checksum code is
the last character of the data. The checksum code is the value added from all data collected,
to check if the data is correct.
After you set the "Code 39 without Checksum" function, the scanner will recognize all Code
39 normally. The scanner defaults enabling "Code 39 without Checksum".
After you set the "Enable and Transmit Code 39 Checksum", the scanner will take the last
digit of the Code 39 data output as checksum and transmit it as normal data collected but
won't be able to recognize Code 39 without checksum.
After you set the "Enable but Do not Transmit Code 39 Checksum" function, the scanner will
take the last digit of the Code 39 output as checksum but won't transmit it. And it won't be
able to read Code 39 without checksum.
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