Fundamental question on edge phase noise from sampled PNOISE

Hi,

I have a few fundamental questions on edge phase noise and sampled PNOISE sim. Could you please give me some idea or point me to any helpful material.

My question is a below, 

Phase noise in dBc/Hz with time average PNOISE, the sweep frequency range is usually set as "relative to fundamental tone". And it makes sense that phase noise is referred to fundamental tone power.

In sampled PNOISE sim for driven circuit, we set "absolute sweep frequency"  up to Nyquist of the clock. Because output noise is sampled by clock period in the measurement (This part also makes sense to me). But edge phase noise is plot in unit "dBc/Hz". What is the carrier power in this measurement? Is it still the fundamental tone of the clock?

Thanks and regards,

Yutao