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HMC830 output SNR performances

Hi to all,

I have integrated the HMC830 on a test signal generator to generate test signal in the frequency range 50-350 MHz.

My test board amplify the output of the HMC830 and filter the output to remove harmonics.

I shall obtain signal with high SNR to very the performance of the UUT (AD9650 sampling @800 Mhz)

The HMC850 reference signal comes from an AD9545 to obtain a low phase noise 50 MHz .

What is the suggested loop filter configuration values? How can I try to find the best ones?

I try to simulate and I change the values on one prototype but the results are bad, worst than the others that has been copied from the EVM board.