POSIFLEX PG-200/2D-O, Advanced Manual

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Scan rate:
The number of scans (the attempts to recognise a barcode symbol optically) per time
unit.
Scanner:
See Scan engine.
Start bit:
A control bit used to indicate the start of a group of data bits being sent in
asynchronous transmission.
Stop bit:
A control bit used to indicate the end of a group of data bits being sent in
asynchronous transmission.
Structured append:
The possibility to concatenate multiple bar codes into one block of data. This method
is supported by most 2D bar codes.
Suffix:
One or more characters which accompany transported data. A suffix is put at the end
of the data and is part of the frame.
Symbology:
A set of rules specifying the way in which data may be represented.
Trigger:
A signal that initiates an action or a series of events. The trigger button on a bar code
reader will start the scan-engine and try to decode the scanned and digitized data.
TTL interface:
A serial interface that typically is used between embedded devices. The TTL standard
defines a logical "1" level at 5 volt.
USB:
An acronym for Universal Serial Bus. This bus allows for multiple and different
devices to connect to a single host, like a computer.
VCP:
An acronym for Virtual Communications Port. This will emulate the RS232 port for
the USB interface.