HandHeld Entertainment Document Reader 4800dr - Manual (Page 92)

7 - 6 4800dr Barcode Guide
OCR Modulo 10 Check Character
Scan this symbol to program the OCR template for a simple modulo 10 checksum of the digits 0 through 9.
OCR Modulo 36 Check Character
Scan this symbol to program the OCR template for a simple modulo 36 checksum of the digits 0 through 9 and the letters A
through Z.
OCR User-Defined Check Character
You can customize the check character calculation to suit your application. Each character of the check character alphabet can
be programmed in its proper order. The number of characters you enter determines the modulo value for the calculation. By
default, the check character computation is unweighted, but the imager also supports two weighted modulo 10 checking
schemes.
Example: To program a modulo 11 check character, you would enter the following 11 characters in order:
0123456789X
Also enter the OCR template:
dddddddc
Enable the OCR-A font, then scan the following string:
6512351X
The imager performs the following check character computation:
(6 + 5 + 1 + 2 +3 + 5 + 1 + X) modulo 11 = 0
Since the result is zero, the message is considered to be valid, so the reader outputs the message: 6512351
Programming a User-Defined Check Character
1. Scan the Enter OCR Check Character barcode, below.
2. Enter the characters in order. For each character, look up the corresponding hex value from the ASCII Conversion Chart
(Code Page 1252) , page A-3. Use the Programming Chart on the inside the back cover of this manual to scan the two
symbols for each hex value.
3. Scan the Save barcode on the inside back cover.
OCR Modulo 10 Check Character
OCR Modulo 36 Check Character
Enter OCR Check Character