Hello everyone,
Sorry to bother you again. Thank you for all the help and instructions you provided before. Here I have one more problem again. It seems that I cannot observe and output signal from channel1~4 and channel9~12.
First I plugged FMC116 to my VC707. Then I used the Differential Signaling Input Buffer (IBUFDS) to convert the LVDS signals from FMC116 to single-ended signals. After that, I routed those single-ended signals to the SMA connector on the VC707, connect them to the oscilloscope, and observe them.
I could always see outputs from channel5~8 and channel13~16. But when it came to channel1~4 and channel9~12, I could not observe any signal at all, no DCO signal, no OUTPUT_A, nor OUTPUT_B. At first I thought the ADCs responsible for those channels might have been broken. But when I tested those channels with the reference design you provided, they worked pretty well.
Could anyone give me a hint? What may be the reason?
Thank you very much!
Xun