Please help me to find an answer regarding to AD9970.
What is the right sampling position for SHP and SHD clocks?
If I use the SHD and SHP position as in Datasheet page 14, I got all black instead of light.
You will need to adjust the locations to account for the analog signal delay in your design. Try shifting both SHP and SHD together until you see some light response. Then, adjust each signal separately (holding the other constant) to "trace" the input waveform and find the optimum location for each one.
Should I keep SHD in front of SPH or reverse thir position?
Very appreciate for your generous help.
The order does not matter. Please see this similar AD9949 discussion for more details: http://ez.analog.com/message/42463#42463
I will let you know my result.
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