Wasp Bar Code WLS 8400 ER Postnet Code, Print Contrast Signal PCS, Programming Mode, Quiet Zone

GL-12WLS 8400 Product Reference Guide

Postnet Code	Code developed by the U.S. Postal Service to assist in
	the automatic sorting of mail.
Print Contrast Signal (PCS)	Measurement of the contrast (brightness difference)
	between the bars 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.
Radio Frequency	Non-optical automatic identification devices that use
	radio waves to transmit data.
Radio Frequency Data Communication	Handheld or vehicle mounted units that send and
(RFDC)	receive messages by radio frequency. Information
	from the units is displayed on a screen for workers
	and allows real-time, two-way exchange of data
	between terminals when one terminal is mobile and
	the other is a host computer at a remote location.
Radio Frequency Identification (RFID)	The use of small radio transponders that are activated
	by a reading transmitter. The transponder carries a
	unique ID code or other information in its memory
	and can be read at a distance without line of sight.
Radio Frequency Tag	An electronic tag capable of receiving, storing and/or
	transmitting digital information.
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.