What clocking options are available for the MxFEs? What modifications to the board are required to support external direct clocking of the MxFEs?
The entire clocking architecture of the Quad MxFE platform is described here on the wiki: https://wiki.analog.com/resources/eval/user-guides/quadmxfe/boardhardwaredetails#clocking_architecture
The clocking strategies for the MxFEs are as follows:
Normally the Quad MxFE boards are populated such that the ADF4371s directly clock the MxFEs at 12GHz.A change in the direct clock rate requires an HDL change and Linux rebuild. A customer would have to implement these changes.