In facsimile, a frequency modulationsystem where one frequency represents picture black and another frequency represents picture white[?]. Frequencies between these two limits may represent shades of gray
An intentional frequency change used for modulation purposes
... The racial makeup of the town is 89.82% White, 1.47% African American, 0.20% Native American, 1.45% Asian, 0.02% Pacific Islander, 3.86% from other races, and ...