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ADV7401 LLC1 jitter

Question asked by savery on Jul 4, 2011
Latest reply on Jul 6, 2011 by savery

I've got an application where the output of a ADV7401 is tied directly to a ADV7343. If I turn on the ADV7343 PLL then nothing works. The o-scope shows a horrible looking video signal. Looking at the LLC1 output of the ADV7401, which is tied to CLKINA of the ADV7343, I notice a lot of jitter.

 

There is a work around which is to simply turn the PLL of the ADV7343 off but that means no oversampling

 

Has anyone seen this? If so, how was it resolved?

 

Is the LLC1 output of the ADV7401 jittery or am I doing something wrong?

 

Thanks,

Shane

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