54 PX940 User Guide
All Supported 1D Barcodes Overall Parameters
Content Description
R Max The highest reflectance in any element or quiet zone in a scan reflectance profile, or the highest
reflectance of any sample are in a two-dimensional matrix symbol.
Example:
<RMax>79.2%</RMax>
R Min The lowest reflectance in any element in a scan reflectance profile, or the lowest reflectance of any
sample area in a two-dimensional matrix symbol.
Example:
<RMin Grade="4.0">0.5%</RMin>
Min Edge
Contrast
The minimum difference between bar reflectance and space reflectance of two adjacent elements.
Example:
<ECMin Grade="4.0">67.2%</ECMin>
Symbol
Contrast
The difference between the highest and lowest reflectance values in a scan reflectance profile.
Example:
<SymbolContrast Grade="4.0">84.0%</SymbolContrast>
Modulation The ratio of minimum contrast to symbol contrast.
Example:
<Modulation Grade="4.0">80.0%</Modulation>
Defects Irregularities found within elements and quiet zones; measured in terms of element reflectance
non-uniformity.
Example:
<Defects Grade="4.0">8.5%</Defects>
Decodability A measure of the accuracy of its production in relation to the appropriate reference decode
algorithm.
Example:
<Decodability Grade="4.0">76.5%</Decodability>
Decode Decodable symbols shall comply with the symbology specification. Value in grade.
Example:
<Decode Grade="4.0"/>
Quiet Zone The areas to the left and right of the barcode that is free from text or graphics to successfully read
the barcode.
Example:
<QuietZone Grade="4.0"/>
Global
Threshold
The reflectance level midway between the maximum and minimum reflectance values in a scan
reflectance profile, used for the initial identification of elements.
Example:
<GlobalThreshold>42.5%</GlobalThreshold>
Print
Contrast
Signal
The contrast between bars and spaces or background.
Example:
<PCS>99.4%</PCS>
Average Bar
Gain
Average bar gain or loss in percentage
Example:
<BarGain>-1.1%</BarGain>
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General
Weight and Dimensions
