What does the Decoded and Undecoded mean?
Barcode scanner that has built-in decoder is able to output the decoded signals that a computer can understand such as Keyboard wedge and RS-232C outputs. The undecoded reader basically outputs TTL level waveform which requires an additional decoder circuit / components, the undecoded barcode reader is normally used for system/hardware integration purposes where the system/hardware have the decoder circuit and IC designing already.
