Motorola DS3478 - Manual (Page 166)

11 - 8 Symbol DS3478 Product Reference Guide
Code 39 Full ASCII Conversion
By default, this parameter replaces characters that do not have a corresponding character in the Code 39
symbology set with a space. Enable this parameter to encode the data sent to the scanner emulation host in Code
39 Full ASCII. This setting requires that the host be able to interpret Code 39 Full ASCII data.
This setting applies only if you enabled Convert All to Code 39.
*Do Not Convert Code 39 To Full ASCII
(Disable)
Convert Code 39 To Full ASCII
(Enable)