HP Point of Sale rp5000 HP USB Barcode Scanner Programming Reference Guide - Page 23
UPC-A Preamble, Character only, transmit System Character and Country Code
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Symbologies UPC-A Preamble Preamble characters are part of the UPC symbol consisting of Country Code and System Character. Three options are given for transmitting UPC-A preamble to the host device: transmit System Character only, transmit System Character and Country Code ("0" for USA), and no preamble transmitted. Select the appropriate option to match the USB host system. No Preamble () *System Character ( ) System Character & Country Code (< COUNTRY CODE> ) Programming Reference Guide 2-15
Symbologies
Programming Reference Guide
2–15
UPC-A Preamble
Preamble characters are part of the UPC symbol consisting of
Country Code and System Character. Three options are given for
transmitting UPC-A preamble to the host device: transmit System
Character only, transmit System Character and Country Code
(“0” for USA), and no preamble transmitted. Select the
appropriate option to match the USB host system.
No Preamble
(<DATA>)
*
System Character
(<SYSTEM CHARACTER> <DATA>)
System Character & Country Code
(< COUNTRY CODE> <SYSTEM CHARACTER> <DATA>)