Motorola SYMBOL LS9203 - Manual (Page 151)

USB Interface 7-17
USB Ignore Unknown Characters
This option applies only to the HID Keyboard Emulation device and IBM device. Unknown characters are characters the host does not
recognize. When Send Bar Codes With Unknown Characters is selected, all bar code data is sent except for unknown characters,
and no error beeps sound. When Do Not Send Bar Codes With Unknown Characters is selected, bar codes containing at least
one unknown character are not sent to the host, and an error beep sounds.
*Send Bar Codes With Unknown Characters
Do Not Send Bar Codes With Unknown Characters
(Disable)