When I using phase domain model verilog-a model in "PLLnoise+jitter.pdf" to analysis pll's phase noise, I encountered some questions,
1) How can i use "ground" correctly, when i use it in loopFilter's model , compiling occurs error of "ground is a future reserved keyword, ..."
2) When i delete ground and connect node 'gnd' to ground symbol at top level, compiling passed with warning, I can perform a PSS  to analysis pll phase model(like Listing1 and with blocks' models ). but analysis stopped at 97.5% and show that V(out) is too small to reliably detect the period of the oscillator....Why does it occur and how to perform a correct PSS analysis?(I set "beat freq" equa to V(in)*Kvco)
3) Why SpectreRF reguard 'out' as a voltage signal?How to analysis phase signal in PSS analysis?
4) Theta(out) in vco model will get larger and larger with time increase, is this a problem?
Can anyone help me? ???

Thank you,Jitter man. I think I haven't read this article carefully.
I still have some problems:
1)I used AC analysis, but voltage and phase of "out" are both zero.
2)When I select Noise Analysis, it tell me must specify an "input noise",so I add an "port" symbol in the schematic, then I can run Noise Analysis and get output noise result. Do I do this in a right way?and how can I convert the result to phase noise.
ps: I do that all in ADE gui.
3) Can you tell me the typical "n: and "fc" value of each pll block? Now I filled their value arbitarily.


Thanks for any help!

Thanks a lot!
But, you know that pll phase model only have 2 node(including "gnd"), I can't add an input on the shematic when I run an AC analysis.
Also, port or voltage/current objects can not connect to a node of pll in the schematic, so I just let its two nodes connect to nothing. I think I only care that I can run "noise analysis" to get output noise and the connection of an input source is not necessary.

Oh, I see.
I should not use that PLL model of Listing1 in simulation. Now I connect independent symbol of each block  together in a schematic. When I perform an AC or a noise analysis, I delete the Oscillator symbol instead of an dc voltage source only with AC mag equal to 1.