Transient Noise Analysis | Noise File

Hello,

I am going to measure jitter of a VCO by means of Transient Noise Analysis. Simulation setup is not sophisticated, but I have some general questions though.

I am using models of transistors that have been provided by PDK and they contain noise model too? In model setup dialog box (ADE) I can choose among several model sections. There are sections cmoswo (worst case one condition) and cmoswz (worst case zero condiction). What do they mean? Does the choice of the model section affects transient noise analysis results?  So, in general when simulating noise of a circuit, and considering the circuit only (without 'external noise sources') I do not need to add any other noise sources, for they are included in the componet model?

The schematic contains a voltage source (vdc from analogLib), and in its properties there is 'noise file name' field. As far as I know, it contains frequency-magnitude pairs. What are the rules the file should be written? So, if I understand it correctly, by means of a noise file I can model noise of the voltage source that will be used to power the real circuit (after production). Can I measure the noise spectrum of a power supply device and describe it in the noise file to model the device noise in transient noise simulation?

Quite many questions this time :), many thanks for your help in advance,

 Kind Regards,

pitter.