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P470/370 RF Scanner Product Reference Guide
UPC-A Preamble
Three options are given for lead-in characters for UPC-A symbols transmitted to the host
device: transmit system character only, transmit system character and country code (“0” for
USA), and no preamble transmitted. The lead-in characters are considered part of the
symbol.
NO PREAMBLE
(<DATA>)
*SYSTEM CHARACTER
(<SYSTEM CHARACTER> <DATA>)
SYSTEM CHARACTER & COUNTRY CODE
(< COUNTRY CODE> <SYSTEM CHARACTER> <DATA>)