Forum Discussion
Altera_Forum
Honored Contributor
13 years agoIt's tough to diagnose a tricky problem like this one.
It definitely sounds timing related. Have you read through this nice timequest tutorial http://www.alterawiki.com/uploads/3/3f/timequest_user_guide.pdf ? You might want to go though it and make sure your SDC file fully constrains all your clock domains and I/O. Other than that, maybe you can try signal tapping your fifos for your video quadrants and try and determine if they are under / overflowing and ferret out the cause of this if for some strange reason it is not timing related.