Scanner
A device that examines a printed pattern (barcode) and either passes the uninterpreted data
to a decoder or decodes the data and passes it onto the Host system.
Serial Port
An I/O port used to connect a scanner to your computer, identifiable by a 9-pin or 25-pin
connector.
Signal
An impulse or fluctuating electrical quantity (i.e.: a voltage or current) the variations of which
represent changes in information.
Symbol
A combination of characters including start/stop and checksum characters, as required, that
form a complete scannable barcode.
Trigger Signal
A signal, typically provided by a photoelectric sensor or proximity switch, which informs the
scanner of the presence of an object within its reading zone.
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