Worth Data 7000 Code 39 Advanced Features and Functions

can vary from a low of .75 characters per inch (cpi) to a high of 9.4 cpi. There should be a ¼" "quiet zone"
(white space) to the left and right of the bar code.
Code 39 uses an asterisk (*) as a start and stop character. This character must precede and follow the data in
the bar code. The RF Terminal gives you the option of transmitting or not transmitting these characters
when the bar code is read.
Exact specifications for Code 39 and other bar code symbologies can be obtained from ANSI at the address
below:
American National Standards Institute
Customer Service
11 West 42nd St.
New York, NY 10036
http://web.ansi.org
document ANSI/AIM BC1-1995
Code 39 has several advanced features and functions that are discussed further in this appendix.
Code 39 Advanced Features and Functions
Mod 43 Check Character
Standard Code 39 can be printed with a "Mod 43 Check Character". This Mod 43 check character cannot
be used with Full ASCII Code 39. Assigning a value to each character in the data to be bar coded from the
table as follows derives the check character:
Char value Char value Char value Char value
0 0 B 11 M 22 X 33
1 1 C 12 N 23 Y 34
2 2 D 13 O 24 Z 35
3 3 E 14 P 25 - 36
4 4 F 15 Q 26 . 37
5 5 G 16 R 27 space 38
6 6 H 17 S 28 $ 39
7 7 I 18 T 29 / 40
8 8 J 19 U 30 + 41
9 9 K 20 V 31 % 42
A 10 L 21 W 32
Mod 43 Check character calculation for Code 39
Here is an example to illustrate how the check character is calculated for bar code data of 123XYZ:
Take the sum of the values assigned to each character:
1 + 2 + 3 + 33 + 34 + 35 = 108
1 2 3 X Y Z
Divide the sum by 43: (thus the name modulus 43)
108/43 = 2 with a Remainder of 22
Find the character corresponding with the remainder.
M (value 22) is the CHECK CHARACTER
The data becomes 123XYZM, with M added as the Mod-43 check character.