PSC Handheld Laser Bar Code Scanners Keyboard Wedge / Wand Emulation Interface - Manual (Page 47)

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Option QB or Option QC enable both UPC-A and UPC-E. If UPC is
enabled, any UPC label, with or without supplement, is read. The
supplement is read if Option QB is selected, and it is ignored if
Option QC is selected.
Expanded UPC-E is disabled by scanning Option QH, or is enabled
by scanning Option QI.
QH Disable Expanded UPC-E *#@
QI Enable Expanded UPC-E
Transmission of the first character in a UPC symbol (the number sys-
tem character) is disabled by scanning Option QD or enabled by
scanning Option QE.
QB
Enable UPC with 2 or 5 Digit
Supplement Enabled
QC
Enable UPC with 2 or 5 Digit
Supplement Disabled *#@
QD
Disable Transmission of Number
System Digit
QE
Enable Transmission of Number
System Digit *#@