Wasp Bar Code WLS 8400 FZ Scanner, Scanning Mode, Scanning Sequence, Self-Checking Code, Skew

Glossary GL-13

Scanner	An electronic device used to scan bar code symbols
	and produce a digitized pattern that corresponds to
	the bars and spaces of the symbol. Its three main
	components are:
	1. Light source (laser or photoelectric cell) -
	illuminates a bar code.
	2. Photodetector - registers the difference in reflected
	light (more light reflected from spaces).
	3. Signal conditioning circuit - transforms optical
	detector output into a digitized bar pattern.
Scanning Mode	The scanner is energized, programmed, and ready to
	read a bar code.
Scanning Sequence	A method of programming or configuring parameters
	for a bar code reading system by scanning bar code
	menus.
Self-Checking Code	A symbology that uses a checking algorithm to detect
	encoding errors within the characters of a bar code
	symbol.
Skew	Rotation of a bar code symbol on an axis parallel to
	the symbol's length.
Space	The lighter element of a bar code formed by the
	background between bars.
Space Width	The thickness of a space measured from the edge
	closest to the symbol start character to the trailing
	edge of the same space.
Specular Reflection	The mirror-like direct reflection of light from a
	surface, which can cause difficulty decoding a bar
	code.
Stacked Symbol (2D Symbols)	A 2-dimensional (2D) symbol with sequences of
	linear (width-coded) data that are stacked one upon
	another (i.e., PDF417).
Start/Stop Character	A pattern of bars and spaces that provides the scanner
	with start and stop reading instructions and scanning
	direction. The start and stop characters are normally
	to the left and right margins of a horizontal code.
Substrate	A foundation material on which a substance or image
	is placed.