I designed ADF4350 Synthesizer (my own PCB) to synthesize 1G Hz using the example in UG-110.pdf. VCO freqncy is 4G and I am using RF divide by 4 to generate 1G.
N = 400,
Ref_in = 10M Hz.
I used Agilent E4420B to generate 10M Hz as referenc input. I got the Phase Lock and 1G Hz output. However, I could not get a good phase noise plot. You can see that I got about -60 dBc/Hz for the 1G output. The Phase noise for the 10M Ref is also in the plot.
I attach the plot of spectrum analyzer and phase noise plot for 1G Hz output for your review.
Could you verify my results please?