Wasp Bar Code WPS100 Percent Decode, Print Contrast, Signal PCS, Quiet Zone, Reflectance, Scanner

	Glossary
Percent Decode	The average probability that a single scan of a bar code would result
	in a successful decode. In a well-designed bar code scanning system,
	that probability should approach near 100%.
Print Contrast	Measurement of the contrast (brightness difference) between the bars
Signal (PCS)	and spaces of a symbol. A minimum PCS value is needed for a bar
	code symbol to be scannable. PCS = (RL - RD) / RL, where RL is the
	reflectance factor of the background and RD the reflectance factor of
	the dark bars.

Programming Mode The state in which a scanner is configured for parameter values. See

	SCANNING MODE.
Quiet Zone	A clear space, containing no dark marks, which precedes the start
	character of a bar code symbol and follows the stop character.
Reflectance	Amount of light returned from an illuminated surface.
Resolution	The narrowest element dimension which is distinguished by a
	particular reading device or printed with a particular device or method.
RSS	Reduced Space Symbology: A family of space efficient symbologies
	developed by UCC.EAN.
Scan Area	Area intended to contain a symbol.
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.

Space	The lighter element of a bar code formed by the background between
	bars.

Specular Reflection The mirror-like direct reflection of light from a surface, which can cause difficulty decoding a bar code.

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