Symbol Technologies DS 3408 - Manual (Page 139)

Wand Emulation Interface 10-7
Polarity
Polarity determines how the digital scanner's Wand Emulation interface creates the Digitized Barcode Pattern (DBP). DBP is a digital
signal that represents the scanned bar code. Different decoders expect the DBP to be in a certain format. The DBP either has the
"highs" represent bars and the "lows" represent spaces (margins), or the "highs" represent spaces (margins) and the "lows" represent
bars.
Scan the appropriate bar code to select the polarity required by the decoder.
Ignore Unknown Characters
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 on the digital scanner. 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
the digital scanner emits an error beep.
*
Bar High/Margin Low
Bar Low/Margin High
*
Send Bar Codes With Unknown Characters
(Transmit)
Do Not Send Bar Codes With Unknown Characters
(Do Not Transmit)