I'm evaluating the ADF4350 and comparing it to the datasheet figures. I'm seeing some strange results that don't seem to match for Figure 11 and 12. I am using the ADF4350 Evaluation Board.
For Figure 11 conditions, I'm seeing many spurious tones compared to the datasheet, and for Figure 12 conditions, I see spurs well above the phase noise level. I should also say that for Figure 11, I see intermittent spurs, but I assume those are environmental. Can you review my settings and let me know what I could be doing wrong?
I have the E5052A in Trace->Spurious->dBc mode, so the spurs are in dBc, not dBc/Hz. fREF=50MHz, fPFD=25MHz, fVCO=4227MHz, fRFOUTA=2113.5MHz, loop band width = ~40kHz.
Figure 11 register settings:
Figure 12 register settings:
Thank you !