Datalogic Matrix 400, Manual, Page: 39 / 86

SYMBOL VERIFICATION OVERVIEW
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Modulation (MOD)
Modulation is a measure of the uniformity of reflectance of the dark and light modules
respectively.
Some printing/background factors may reduce the apparent margin between the reflectance
of a module and the Global Threshold.
Print Growth
Print Growth refers to the deviation (larger or smaller) of actual element size from intended
element size due to printing problems.
When a symbol is printed, the ink can spread when it comes in contact with the substrate
causing an Overprinting effect.
If there is not enough ink, or if there is some other problem with printing equipment, the result
may be an Underprinting effect.
Underprinting Overprinting
Symbol Contrast (SC)
Symbol Contrast tests that the two reflective states in the symbol, namely Light and Dark, are
sufficiently distinct within the symbol.
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