Printronix LQH-HWTM Printer User Manual


 
EAN 8
119
Quiet Zone
Both ends of the bar code structure have blank quiet zones. The quiet zones
must be at least 0.25 inches wide and completely blank to ensure accurate
reading of the start/stop codes and to prevent adjacent bar codes from
overlapping. The IGP automatically produces the left quiet zone; you must
provide sufficient space on the form for the right quiet zone.
Start/Center/Stop Codes
The start/center/stop codes are special character codes marking those
portions of the bar code. These codes are automatically provided.
Data Field
The bar code symbol uses a series of varying width bars and spaces to
represent a limited character set (numbers 0-9 and Special Characters Start,
Center, and Stop). The bars and spaces vary in width from one to four
modules. Each character consists of two bars and two spaces that total seven
modules. The symbol coding of the left data field is different from the right
data field to permit read direction sensing.
The optional 2- or 5-digit add-on data, placed at the end of the bar code,
typically identifies a periodical issue number or price, respectively.
Readable Data
The human readable data field provides a readable interpretation of the bar
code data. It can either be suppressed or printed above or below the bar code
symbol.
Check Digit
The modulo-10 check digit is automatically calculated and inserted in the bar
code symbol. The check digit verifies accurate scanning.