CompuServe Messages

>> Also, when there is a moderate to extreme horizontal light transition in the image from the PAR, the verticle edges of the screen are distorted inward and continue to the top of the screen from the line where the light changes from dark to lighter. This happens on both verticle sides of the TV monitors. The greater the light transition from dark to light the greater the distortion. The distortion you are seeing at the top edge of the picture could be caused by over driven video. In a simple setup like the PAR or targa+ I would start by looking at the termination resistance. In a composite signal the sync would also be over driven. Be sure it's 75 ohms. An unusually high resistance could cause this distortion to occur. Other causes are erratic horizontal sync, but unlikely given the simplicity of your setup. Bending of the rectangular portions of the video raster are usually sync related. If you had a WFM, check out the front and back porches of the signal, the blanking and integrety of the burst. There might be some mis adjustment causing video/burst to interfere with the horizontal sync. Just moving your aspect ratio to overscan the problem is like putting a blindfold on. It does not cure the sync problem which will magnify when you dupe your work. In editing we use monitors designed to expose even the slightest problems to correct them early on. Good luck.