-45-   © 2018 unitech Electronics Co., Ltd. All rights reserved. 
unitech is a registered trademark of unitech Electronics Co., Ltd.
 
MS282 User’s Manual 
 
3.3.16 UPC-A Preamble 
Preamble characters are part of the UPC symbol, and include Country 
Code and System Character. Select the appropriate option for transmitting 
a UPC-A preamble to match the host system: 
•Transmit System Character only 
•Transmit System Character and Country Code (“0” for USA) 
•Transmit no preamble.     
 
No Preamble (<DATA>) 
 
System Character (<SYSTEM CHARACTER> <DATA>)* 
 
System Character & Country Code(< COUNTRY CODE> 
<SYSTEM CHARACTER> <DATA>)