Video Test Generator User Guide

802BT/802R Video Test Generator User Guide 39
3. Repeat steps 1 and 2 for all formats and test images. Use the following guidelines to
verify proper operation:
• When testing geometry with the Hatch images (for example, TVHatch and
Hatch20), look for distortion with concave or convex lines near the periphery of the
display. Look for irregular spacing on the cross hatch patterns.
• When testing photometry such as chrominence, use the TVBar100 & TVBar_75
(TV formats only), ColorBar, SMPTE133 or SMPTEbar images. Look for missing
bars which may indicate a dead or unconnected channel. Also, look at the transition
between the bars; they should be sharp and distinct. Each bar also should be
uniform in color and intensity across its entire width.
• To test luminance you can use the SMPTE133 (grayscale portion) image. To test
gamma correction you can use the SMPTE133 (checkerbox portion) image. The
detailed methods for verifying these parameters on the SMPTE133 image are
provided in Appendix B, “Image Reference.”
• When testing focus with the Focus or Text images, the characters in all areas of the
display should be well-formed and in focus.
• When testing resolution with the Grill images, you should be able to see individual
and distinct stripes in all areas of the display at all four resolutions.
• When testing for centering use the TVOutline and Outline images. The detailed
methods for verifying centering with the Outline images (Outline0, Outline1,
Outline2, Outline3) are provided in Appendix B, “Image Reference.”
• When testing for high voltage regulation with the Regulate image, observe the
outline at the edges of the image. They should stay in place and not pull away from
the area of the large white blinking patch (when it appears).