Honeywell Xenon 1900 User Manual page 208

UPC-E0 Addenda Required
When Required is scanned, the scanner will only read UPC-E bar codes
that have addenda. Default = Not Required.
Required
UPC-E0 Addenda Separator
When this feature is On, there is a space between the data from the bar
code and the data from the addenda. When turned Off, there is no space.
Default = On.
* On
UPC-E0 Check Digit
Check Digit specifies whether the check digit should be transmitted at the
end of the scanned data or not. Default = On.
* On
7 - 30
* Not Required
Off
Off