jitter be found at AD9880 output Hsync pin

Hi William,

I'll pass this on but this part is part I nearly 10 years old, there is little support available. It was known to have high output jitter compared to parts from today so this may be expected behavior.

Dave

Hi William,

As Dave mentioned, there is very little support material available for this old product. I'm polling others within our organisation to check if anyone had seen a similar issue before. I'll come back here when I've had a response.

Best regards,

Joe

Hi William,

Can you ensure that the customer is using the following TMDS PLL settings:

These are the latest recommended settings. These settings also apply to the AD9380, AD9381, AD9396, AD9397 and AD9398.

Thanks,

Joe

Hi, Joe,

thanks, I'll ask customer to verify your configuration. and get their feedback ASAP.

Hi, Dave,

if the bigger jitter is expected behavior, it means it must have a retiming block between AD9880 and SiI9136, right?

customer current setup as below

Hi, Joe,

Huawei has tested your setup

there's still big jitter, and, customer corrected that the jitter not found at the HS pin, HS pin is OK, the jitter is found by the VS pin,  sorry for this

Taken offline.