Texas Instruments MATRIX 3000, DW30 System Configuration Test Pattern, Test Pattern Grey Level

Section 3: Operation

System Configuration	f Test Pattern
DIAGNOSTICS / CALIBRATION	Choose the desired internal test
	pattern to display, or select OFF
	to turn off a test pattern.
	Alternatively, use the Test key
	for cycling through test patterns.
	NOTE: There is a center line
	(both horizontal and vertical) in
	the Edge Blending test pattern.
	The intersection of these lines is
	the true center of the projector’s
	display area.
	Test Pattern Grey Level
	Set the desired level of grey for displaying in the full gray field test pattern.
	Freeze Image
	Enter a check mark to freeze (stop) an image on a single frame. This diagnostic tool is
	useful if you need to examine in detail a still version of an incoming image that cannot
	be “frozen” at the source. For example, in moving images it is sometimes difficult to
	observe artifacts such as external de-interlacing/resizing and signal noise. Remove the
	checkmark to return back to normal.
	Color Enable
	Select which color or colors you want to see. This is useful while working with color
	temperature, input levels or other special setup parameters. Colors can also be
	enabled/disabled by entering the corresponding function code listed on the back of the
	standard IR remote.
	Odd Pixel Adjustment
	NOTES: 1) Factory-set and rarely required by user. 2) Source must be >90 MHz.
	When using certain RGB sources, you may need to adjust the normal gain or offset of
	odd pixels in relation to even pixels. This will smooth out very narrow (1-pixel wide)
	“checks” or vertical stripes that indicate adjacent “on” and “off” pixels. Using the
	Level Detector simplifies this process (see Figure 3.23):
	1. Use an external analog native-sized continuous grayscale test pattern with at least
	256-levels.
	2. Turn “Level Detector” on.
	3. Set “Level Value” to ~200. The image should now be black-and-white (or black-
	and-one color, if you use “Color Enable” function).
	4. Adjust offset. Half of the pixels will move, the other half will not.
	5. Adjust until the two transition regions overlap. The stripe of noise will be
	minimized, defined by the value in the slidebar.
	6. Set “Level Value” to ~800. The image should now be black-and-white.
	7. Repeat Steps 4 and 5, but adjusting gain.
	8. Repeat Steps 3-7 for all remaining colors. Your RGB source should now be OK.

013-100149-02 Rev. 1 (01/07) Christie DS+60/DW30/Matrix 3000 User’s Manual 3-45