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Chapter 7Bar Codes
UPS 11
The UPS 11 structure is shown in Figure 25 and described below.
Figure 25. UPS 11 Structure
Quiet Zone
Both ends of the bar code structure require blank quiet zones. The q uiet
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
Thesta rt/stop codes identify the leading and trailing end of the bar code. Each
of the UPS 11 subsets uses a unique start code and a common stop code,
both automatically provided.
Data Field
UPS 11 is a special case of Code 128 (page 237). This bar code is restric ted
to 10 data characters. The first character must be 0 through 9 or A through Z.
The remaining nine digits must be 0 through 9.
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