Symbol Technologies DS 3408 - Manual (Page 115)

USB Interface 8-9
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.
Emulate Keypad
When enabled, all characters are sent as ASCII sequences over the numeric keypad. For example ASCII A would be sent as “ALT
make” 0 6 5 “ALT Break”.
*Send Bar Codes with Unknown Characters
(Transmit)
Do Not Send Bar Codes with Unknown Characters
(Disable)
*Disable Keypad Emulation
Enable Keypad Emulation