Using ADF4159 PLL, I'm implementing a FMCW Radar application. Instead of onboard 100MHz clock source, I connected an external clock source of 100MHz whose part number is as follows "LNO 100 SG 58 C 12100M". I designed a loop filter that meets my RF out and waveform requirements in ADIsimPLL. I'll attach the settings screenshot at the end. So coming to point, I ran a simulation in ADIsimPLL to observe the phase noise produced in PLL at 10KHz offset. As you can notice in the right column, under reference menu, I selected phase noise as 'Point/Floor' because I selected custom reference clock option while designing.
So my questions are as follows,
- Could using external clock source as ref. signal affect the phase noise in PLL significantly?
- I'm trying to achieve phase noise value as -106 dBm/Hz at 10KHz offset. Is is possible to achieve it with the settings I mentioned?
- ADIsimPLL is getting terminated whenever I'm selecting the external Ref. oscillator from Library menu. What could be the reason?
- Is there any way to edit or add the external Ref. frequency oscillator libraries in ADIsimPLL such as 'LNO 100'?