I'm afraid we can only respond to questions that are in English on this forum.
Thank you.I have translated my problem in English.
There are three adv7441a in my design.The first and the second adv7441a capture analog vga signal with a resolution of 1920*1200 occurs when the image interference problem. 1920*1080 resolution in the acquisition occurs when a slight shake, but through debugging ADV744A of 0x6A register phase parameters can be debugged.But in 1920 * 1200 resolution, through the commissioning 0x6a, 0x37, 0xf4 these three registers, and can not fix the problem. The third ADV7441A will not cause this problem. Please experienced engineers, analyze the reasons, thank you!
What is the pixel rate and timing for this 1920x1200 format?
Also-- for new designs we recommend ADV7842. Only limited support is available for ADV7441A.
1920x1200 format is that refresh rate is 60hz,and horizontal frequency is 74khz,and pixel frequency is 154Mhz.ADV7441A has been used by my design,so please help me to analyze this problem.Thanks
Ok. 154Mhz should work. On your picture, the components all look out of sync with each other. That isn't something the ADV7441A could do as it has no buffereing. Have you tried putting a ramp on all three components and then looking at the output pixel bus to see how they are aligned coming out of the ADV7441A?
Thank you for your answer.But I am afraid that I don't know how I can do.You said that I tried putting a ramp on all three componets and then looking at the output pixel bus to see how they are aligned coming out of the ADV7441A.I don't know how i can debug my PCBA.Would you please elaborate on how to debug.
What I mean is to use a logic analyzer (or a scope with a lot of channels) to look at the values on the output pixel bus of the ADV7441A. If you are using a color ramp on the input then the RGB or YCbCr components should be known values and you can see whether the components are shifted coming out fo the ADV7441A.
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