DS90CR285 Channel Link Transmitter Jitter

I am interfacing to a camera that is using a DS90CR285 transmitter chip to implement a base mode camera link interface.  The camera has a 200 MHz crystal oscillator that is input to a Xilinx Virtex 4 FPGA to generate a 50 MHz clock input to the transmitter chip.  The output clock from the transmitter chip appears to have 3 modes of frequencies that it operates at.  Is this a known issue for this chip?  Why does this jitter occur and what can be done to eliminate it?  The frame grabber that we have chosen to use to interface to this camera uses a Xilinx receiver that has problems with this jittery clock. I have searched the forums and blogs and not been successful at finding anything related to this issue.