Symbol Technologies LS 400XI - Manual (Page 61)

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LS 400Xi 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
()
SYSTEM CHARACTER
( )
SYSTEM CHARACTER & COUNTRY CODE
(< COUNTRY CODE> )