Socket Mobile D740 Guía De Programación página 31

To enable or disable UPC-A, scan the appropriate barcode below.
UPC-A
Enable (default)
UPC-A Preamble
Preamble characters (Country Code and System Character) can be transmitted as part of a UPC-A
symbol. Select one of the following options for transmitting UPC-A preamble to the host device:
transmit system character only, transmit system character and country code ("0" for USA), or
transmit no preamble.
No Preamble
System Character (default)
31
UPC-A
Disable