Hand Held Products 4800p, User Manual

Page: 121 / 184

4800p 2D Imager User’s Guide 8 - 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 bar code, below.
OCR Modulo 36 Check Character
Enter OCR Check Character