Texas Instruments MATRIX 3000 Peak Detector, Level Detector, Level Value, Aspect Ratio Overlay

Section 3: Operation

Peak Detector

The “Peak Detector” is a fast method for defining individual input levels, and can improve the accuracy of input levels set by the Auto Input Level function. Enabling the “Peak Detector” activates a special operating mode for detecting only pixels that are considered black or white—all other levels are displayed as a mid-level gray. When used with a 16-step grayscale pattern in which the two black and white bands are known to be at opposite edges of the image, you can watch these isolated areas while adjusting individual blacklevels and input drives until both bands are just visible. Images from this source will then display correct blacks and whites without crushing or washing out.

NOTE: If using Peak Detector with PIP, both images must have the same color space.

Level Detector

The “Level Detector” checkbox enables specific thresholds for blacks and whites— input levels that fall below a specified Level Value (see below) are displayed as black, and all others are displayed as white. It aids in Odd Pixel Adjustment. To use:

	1.	Enable “Level Detector” and display a continuous grayscale.
	2.	Set “Level Value” to near black (such as 200).
	3.	Adjust Offsets to minimize area of black stripe.
	4.	Set “Level Value” to near white (such as 800).
	5.	Adjust Gains to minimize area of white stripe.
	Level Value
	Level Value defines the value to be used by the Level Detector in recognizing blacks
	and whites. See Level Detector, above.
	Aspect Ratio Overlay
	Selecting this option with a checkmark will overlay a number of common aspect ratio
	boxes on top of the source image. This is very helpful during the setup of the projector
	and can be turned off after desired specifications have been achieved.
System Configuration	f The single “Option Card” entry in the Configuration menu identifies which optional
OPTIONAL INPUT MODULES	input module (a.k.a. cards) is present at INPUT 5 (Option 1). If the option slot is
	empty, the corresponding read-only menu entry does nothing. If there is a module
	installed, the corresponding menu entry may activate a submenu of further options
	pertaining to that module.

For example, if the Dual SD/HD-SDImodule is installed at INPUT 5 (Option 1). The Option 1 Card submenu provides controls for configuring the various connections on this multi-input, multi-output module. As desired for your application, you can define 1) which physical input loops through to which output, and 2) which functional input (main or PIP signal) loops through to which output.

013-100149-02 Rev. 1 (01/07) Christie DS+60/DW30/Matrix 3000 User’s Manual 3-47