Quantum Data 801GC, 801GF, 801GX manual Hatch64W

Hatch64W

Description	This is still another version of a crosshatch pattern
	that may be called for by some manufacturers’
	test procedures. The primary version consists of
	an 8 by 8 white crosshatch on a black background.
	A white rectangular patch is added in the center.
	The secondary version inverts the image to black
	lines and box on a white background.

Purpose	This is a general purpose test image that can be
	used to check and adjust video scan linearity and
	geometry and color convergence. The large white
	rectangle also allows for checking a display’s high
	voltage regulation. This is done by observing the
	vertical lines at the left and right edges of the
	image. They should be fairly straight and not pull
	in the area of the white rectangle.

4-34 Chapter 4: Built-In Images Model 801GC, 801GF & 801GX¥Rev. X1