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MS851 User’s Manual
3.1.16 UPC-E1 Preamble
Preamble characters (Country Code and System Character) can be
transmitted as part of a UPC-E1 symbol.
Select one of the following options for transmitting UPC-E1 preamble to the
host device: transmit system character only, transmit system character and
country code (“0” for USA), or transmit no preamble.