We are using AD9517-4 for reference frequency set generation: 400MHz, 200MHz and 100MHz. We used GXO-E72 100MHz PECL crystal oscillator as reference.Our problem is - there is too much noise at offsets between 100Hz and 100kHz.
Reference (100MHz) phase noise:
100MHz PECL output:
ADIsimCLK simulation results:
What may be a reason of this ?
Thanks in advance.