Upc-A Preamble - Symbol DS 3478 Product Reference Manual

13-16 DS 3478 Product Reference Guide
UPC-E1 Check Digit
*
Transmit UPC-E1 Check Digit

UPC-A Preamble

Preamble characters are part of the UPC symbol consisting of Country Code and System Character. There are three options for
transmitting a UPC-A preamble to the host device:
• Transmit System Character only.
• Transmit System Character and Country Code ("0" for USA).
• Transmit no preamble.
Select the appropriate option to match the host system.
System Character & Country Code
(< COUNTRY CODE> <SYSTEM CHARACTER> <DATA>)
No Preamble
(<DATA>)
Do Not Transmit UPC-E1 Check Digit
*
System Character
(<SYSTEM CHARACTER> <DATA>)