Motorola LS9203 用户手册
Symbol LS9203 Product Reference Guide
9-28
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 host system.
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 host system.
No Preamble
(<DATA>)
*
System Character
(<SYSTEM CHARACTER> <DATA>)