Carier level is +5.4 dBm. Subharmonic and harmonic suppresion is min. 70 dB on 100 MHz, 500Mhz, 1500MHz and 3000 MHz. Second harmonic level reached -60 dBc. Level of harmonics are significantly better than in the second sample.
Conclusion. Final version of the 1GHz Reference clock reached very good parameters compare to all of previous tested samples. I will use just one output. In the case if another output must be used, PCB is prepared for divider parts adding.