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ADV7343 Display problem

Hi ,

We are designing a board similar to circuit diagram

(RevD) Figure 89. ADV7342/ADV7343 Typical Application Circuit

We are output a NTSC interfaced and we see that there is yellow noise all over the output .

Place where we are not output , we have set it output as Black , but on the display we see yellow lines .

Please let me know if you have information with regards to this issue .

Thanking you

With best regards and wishes