I'm a student from Belgium and I'm trying to use an AD9859 for my thesis project. I made my own PCB. As i don't manage to make it work, I decided to check the problem step by step. As Sync_CLK is not outputting anything, I suspect my clock reference to be wrong. I'm using a clipped sinewave TCXO (http://be.farnell.com/fr-BE/txc/7z-26-000mbg-t/tcxo-gps-26mhz-2-x-1-6mm-clipped/dp/2096010 :
TXC 7Z-26.000MBG-T TCXO, GPS, 26MHZ, 2 X 1.6MM, CLIPPED SINE)
as clock reference. As a student, I find it difficult to understand the clock reference section of the datasheet so I maybe made a mistake there. Can you please enlighten me?