Encoded Code 39 (Full Ascii) - Intermec 700 Series User Manual

Bar Codes
Code 11
Code 11 satisfies the requirements for a very high density, discrete numeric bar
code. The name Code 11 derives from 11 different data characters that can be
represented, in addition to a start or stop character.
The character set includes the 10 digits and the dash symbol. Each character is
represented by a stand-alone group of three bars and two intervening spaces.
Although Code 11 is discrete, it is not self-checking. A single printing defect can
transpose one character into another valid character. One or two check digits
obtain data security.
The specifications for Code 11 suggest that this code should have a narrow ele-
ment width of 7.5 mils. This results in an information density of 15 characters
per inch.
Code 39
Code 39 (C39) is the most widely used symbology among the industrial bar
codes. Most major companies, trade associations, and the federal government
find this code to fit their needs. The main feature of this symbology is the ability
to encode messages using the full alphanumeric character set, seven special
characters, and ASCII characters.
Programming for this symbology can be for any length that the application re-
quires. The application program for the 700 Series Computer handles symbology
that is at least one character but no more than 32 characters in length.
When programming the computer for Code 39, it is important to set the symbolo-
gy limit as close as possible (minimum and maximum bar code lengths being
scanned). Doing so keeps the computer bar code processing time to a minimum
and conserves battery power.
Bar code readers can respond to Uniform Symbology Specification symbols in
non-standard ways for particular applications. These methods are not for gener-
al applications, because of the extra programming required. Code 39 Full ASCII
is one example of non-standard code.
" NOTE:
See page C-8 to scan several Code 39 bar code labels available to change settings on your
700 Series Computer.
Encoded Code 39 (Concatenation)
If the first data character of a symbol is a space, the reader may be programmed
to append the information contained in the remainder of the symbol to a storage
buffer. This operation continues for all successive symbols that contain a leading
space, with messages being added to the end of previously stored ones. When a
message is read which does not contain a leading space, the contents are ap-
pended to the buffer, the entire buffer is transmitted, and the buffer is cleared.

Encoded Code 39 (Full ASCII)

If the bar code reader is programmed for the task, the entire ASCII character set
(128 characters) could be coded. This is done using two character sequences
made up of one of the symbols ("$",".","%","/") followed by one of the 26 letters.
C-4 700 Series Color Mobile Computer User's Manual
APPENDIX C