Code 93
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Code 93
The Code 93 bar code structure is shown in Figure 9 and described below.
Figure 9. Code 93Structure
Quiet Zone
Both ends of the bar code structure require blank quiet zones. The qui et
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. Be sure to provide sufficient space on the form for the quiet
zones.
Start/Stop Codes
The start/stop codes identify the leading and trailing end of the bar code.

Code 93DataField

The bar code symbol uses a series of varying width bars and spaces to
represent an extensive character set. The bars and spaces vary in width from
one through four modules. Each character consists of three bars and three
spaces that total 11 modules.
Readable Data
The optional readable data field provides a readable interpretation of th e bar
code data. It can be printed above or below the bar code symbol.
Check Digit
Them odulo-103 check digit is automatically calculated and inse rted in the bar
code symbol. The check digit verifies accurate scanning. The star t code is
included in the check digit algorithm.
DATAFIELD QUIETQUIET START STOP
LOWERGUARD BAND
CODE CODEZONE ZONE
OPTIONALREADABLE DATA FIELD
CHECKDIGIT
OPTIONAL
SR,SC
HEIGHT
POSITION
UPPERGUARD BAND