Without trying it (and I don't have time right now to do the experiments), I'd solve this by using the Direct Plot form in ADE to plot the phase noise (on an example circuit), and then use the Add to Outputs button on the Direct Plot form. Then steal the calculator expression from the outputs pane.

You can probably then use a similar expression in your standalone awd session. Might need a bit of tweaking, but that's how I'd approach trying to figure it out.

Better still do the simulation from within the environment. It makes life easier, so why make life hard for yourself?

Andrew.