GLOSSARYApertureTerm used on the required CDRH warning labels to describe the laser exit window.BarcodeA pattern of variable-width bars and spaces which represents numeric oralphanumeric data in machine-readable form. The general format of a barcodesymbol consists of a leading margin, start character, data or message character,check character (if any), stop character, and trailing margin. Within this framework,each recognizable symbology uses its own unique format.Barcode LabelA label that carries a barcode and can be affixed to an article.Baud RateA unit used to measure communications speed or data transfer rate.CDRH (Center for Devices and Radiological Health)This organization (a service of the Food and Drug Administration) is responsible forthe safety regulations governing acceptable limitations on electronic radiation fromlaser devices. Datalogic devices are in compliance with the CDRH regulations.Code PositioningVariation in code placement that affects the ability of a scanner to read a code. Theterms Pitch, Skew, and Tilt deal with the angular variations of code positioning in theX, Y and Z axes. See pars. 2.2.1 and 2.5. Variations in code placement affect thepulse width and therefore the decoding of the code. Pulse width is defined as achange from the leading edge of a bar or space to the trailing edge of a bar or spaceover time. Pulse width is also referred to as a transition. Tilt, pitch, and skew impactthe pulse width of the code.DecodeThe process of translating a barcode into data characters using a specific set of rulesfor each symbology.DecoderAs part of a barcode reading system, the electronic package which receives thesignals from the scanner, performs the algorithm to interpret the signals intomeaningful data and provides the interface to other devices. The decoder is normallyintegrated into the scanner.EANEuropean Article Number System. The international standard barcode for retail foodpackages.32