Class Series Programmer’s Manual 181Appendix GBar Code DetailsUnless otherwise noted all bar codes depicted here were produced using the ratio/module values of 00 andheight fields of 000 to cause the printer to produce symbols using default bar widths and height fields. SeeAppendix F for the default values.A: Code 3 of 9Valid Characters: 0-9, A-Z, - . * $ / + % and the space character.Variable Length.Valid bar widths: The expected ratio of wide to narrow bars can range from 2:1 to 3:1.The following example prints a code 3 of 9 bar code with a wide to narrow bar ratio of 3:1:LD111A00000001501000123456789121100000000100Barcode AEB: UPC-AValid Characters: 0-9Length: 12 digits. If the user provides 11 digits, the printer will compute the checksum. If the userprovides the checksum, the printer will check that it matches the expected checksum. If it does notmatch, the printer will print out all zeros and the expected checksum. See Appendix P.Valid bar widths: The fourth character of record is the width of the narrow bar in dots. All other barsare a ratio of the narrow bar (2 times, 3 times, and 4 times the narrow bar width).The following example prints a UPC-A bar code:LD111B000000015010001234567890121100000000100Barcode BE
