Datalogic Magellan 8300 Product Reference Manual page 353

Code 128 Add-ons Minimum Reads (continued)
Product Reference Guide
Remember to cover any unused bar codes on this and the facing
page to ensure that the scanner reads only the bar code you intend
to scan.
CODE 128 ADD-ONS MINIMUM READS = 3
CODE 128 ADD-ONS MINIMUM READS = 4
Other UPC/EAN Options
341