Quantum Data 801GC, 801GF, 801GX manual Smpte contd

SMPTE — contd.

Test	Deflection linearity
Method	If the overall height and width of the display’s
	active video area match the sizes in the format,
	the large circle should be perfectly round. Each
	box in the crosshatch pattern should be the same
	size and shape. For more information on testing
	linearity, please see the discussion on the Linearty
	test image.
Test	High contrast resolution
Method	All the 0 and 100% level stripes in all the resolution
	patches should be separate and distinct.
Test	Low contrast resolution and noise
Method	All the mid-level 2 on - 2 off stripes in all the
	resolution patches should be visible and distinct.
	This is a sensitive test for noise in the display’s
	video amplifiers.
Test	Quick gamma check
Method	The average brightness level of the small gamma
	dither box should match the brightness of the larger
	surrounding box. This is a visual check to see if
	the display’s gamma correction is producing the
	correct mid-level response.
Test	Video gain linearity and gamma
Method	The individual gray-scale boxes all should be at
	their indicated levels. A small aperture photometer
	is usually required to get accurate and repeatable
	readings.
Test	Contrast and brightness check
Method	On a display with properly adjusted brightness
	and contrast controls, both the 5% and 95% contrast
	boxes should be clearly visible inside their larger
	surrounding 0% and 100% boxes.

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