If a user wants to operate the FMCDAQ2 board at a lower sample rate, possibly 800MSPS rather than 1GSPS, can the on-board crystal be replaced with a 100MHz crystal? Will this still be within the range under these conditions for the AD9523 to operate and for the JESD interface PLL to work? Any other issues? What is the lowest recommended oscillator frequency that can be used where the board will continue to operate, given the components on the board and the values hard coded into the customer GUI.
The sample rate of 1GSPS looks like it's hard coded into the customer GUI, but if a lower sample rate is possible, the user can simply scale his frequency values, so the software shouldn't be an issue. It's a sampling system, everything should scale, please let me know if there is anything I'm missing.