there' an issue reported by Huawei, said there's big jitter be found at the AD9880 output Hsync pin, I described the issue by attached doucment, thanks for your support.
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.
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.
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, I'll ask customer to verify your configuration. and get their feedback ASAP.
customer current setup as below
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
if the bigger jitter is expected behavior, it means it must have a retiming block between AD9880 and SiI9136, right?
Retrieving data ...