Quantum Data 801GC, 801GF, 801GX BriteBox contd, Brightness Control Adjustment test on the center

BriteBox — contd.

Test	Brightness uniformity
Purpose	The light output of most picture tubes varies
	slightly when measured across the CRT face. This
	test can be used to verify that the light output
	variation is within your spec limits.
Method	Select the inverted version and perform the
	Brightness Control Adjustment test on the center
	box. Then center the light meter probe in each of
	the corner squares and note the reading you get
	for each square. The deviation between each of
	the corner readings and the center reading should
	be within your spec limits.

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