Datalogic Magellan 8300 Product Reference Manual page 276

UPC-A Minimum Reads (continued)
264
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.
UPC-A MINIMUM READS = 3
UPC-A MINIMUM READS = 4
Magellan™ 8300/8400