Quantum Data 801GC, 801GF, 801GX manual SMPTE133

SMPTE133

Description	This image is based on a recommended practice
	(RP-133) test pattern designed by the Society of
	Motion Picture and Television Engineers (SMPTE).
	The original application was used in testing and
	evaluating medical imaging monochrome displays.
	The image now is used in many different display
	applications. The image is self scaling as to the
	number of active pixels and active lines used. Some
	of the image’s elements have minor differences
	from the original SMPTE specification. These
	differences are noted in descriptions of the
	individual elements.
	1) The image is drawn on a reference
		background having a 50% intensity level. The
		background covers the entire active video
		area.
	2)	Crosshatch – There are 10 boxes vertically.
		The number of horizontal boxes is based on
		the physical aspect ratio determined by the
		HSIZ and VSIZ parameters in the currently
		loaded format. The boxes are perfectly square
		with any fractional spaces placed around the
		outside edges of the image. The vertical lines
		are two (2) pixels thick while the horizontal
		lines are two (2) scan lines thick. Small crosses
		indicate the intersection of the horizontal and
		vertical lines when they are covered by other
		parts of the image. All parts of the crosshatch
		are normally drawn using a 70% intensity
		level. A 75% level is used in the secondary
		version.
	3)	Resolution Patch – The patch is made up of
		six (6) smaller boxes that are each about 6.25%
		of the height of the display. The boxes are
		made of alternating intensity (0 and 100%)
		stripes . The stripes run vertically and
		horizontally. The stripes may be one (1), two
		(2) or three (3) pixels wide each. Details of
		the patch are shown in the lower half of the

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