Honeywell 2020 - Manual (Page 110)

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UPC E0 and UPC E1 Addenda Separator
When this feature is on, there is a space between the data from the barcode
and the data from the addenda. When turned off, there is no space.
Default = 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.
UPC E0 Number System
The numeric system digit of a U.P.C. symbol is normally transmitted at the
beginning of the scanned data, but the unit can be programmed so it will not
transmit it.
Default = On.
Off
* On
Off
* On
Off
* On