Quantum Data 980 DP User Manual page 383

980 DP Video Generator - User Guide
11.176.9 Purpose
To present an undistorted display, the horizontal and vertical sweeps of the electron beam across the face of the
CRT should be at uniform speeds. Any non-uniformity in the sweep will cause portions of an image to be stretched
while other portions will be compressed. Non-linearity in a monitor can show up in several ways. It may be present
across the entire screen, a large portion of the screen, or it may be localized in a very small area.
11.176.10 Method
Adjust the display's linearity controls so that all of the boxes in the crosshatch are identical in size. You can
measure the boxes with a ruler or with a gauge made for the monitor under test. Any deviation should be within
your specification limits.
Page 383
Rev. A4
July 14, 2014