Hi Zygot,
thank you for your response and concise response. My concern was it possible and I was missing something . You answered my concern, the ARTY A7 can not input a 10MHz Ref . You have provide me with a back ground task of selecting a suitable board able to route a Ref into the clocking back bone / MRCC. I had a look for a comparison matrix of board capability, but nothing obvious on the DIGILENT web site, so will examine the different board types in detail.
My immediate requirement can be met using a less elegant alternative approach.
Thank you "Xilinx Series 7 SelectIO reference manual" recommendation - I now have and will digest.
Thank you for your assistance,
Regards,
Peter.