618
Appendix B
Image Reference
CheckBy3
Description
The active video area is equally divided into a 3x3 checkerboard of black and white boxes.
The primary version has four white boxes as shown in the image below. The secondary
version has five white boxes (reverse).
Test
Contrast ratio
Purpose
The pattern is based on a proposed ANSI method of measuring the contrast ratio of video
projection systems.
Method
Using a light meter probe, measure and record the light-level reading (in foot lamberts) in
the center of each of the black and white boxes. The contrast ratio is expressed as the
average of all of the white readings divided by the average of all of the black readings.
Summary of Contents for 802BT
Page 1: ...802BT 802R Video Test Generator User Guide ...
Page 52: ...42 Chapter 2 Testing Video Displays ...
Page 62: ...52 Chapter 3 Administrative Tasks ...
Page 118: ...108 Chapter 7 Using GPIB Interface ...
Page 194: ...184 Chapter 10 Testing EDID ...
Page 204: ...194 Chapter 11 Testing HDCP ...
Page 214: ...204 Appendix A Command Reference Commands by name ...
Page 595: ...Video Test Generator User Guide 585 ...
Page 611: ...Video Test Generator User Guide 601 ...
Page 612: ...602 Appendix A Command Reference ...
Page 716: ...706 Appendix B Image Reference ...
Page 744: ...734 Appendix C Error Messages ...