A) The basic measurement of how well analogue to digital and digital to analogue conversion are performed. To test for linearity, a mathematically perfect diagonal line is converted and then compared to a copy of itself. The difference between the two lines is calculated to show linearity of the system and is given as a percentage or range of Least Significant Bits. b) The uniformity of scanning speed which primarily affects the accuracy of geometry along a horizontal or vertical line through the picture center.

c) The measurement of how accurately a piece of electronic equipment processes a signal (a measure of its transparency).