Frequency Domain and Noise Domain

Dear all,
I'm working on a VHDL-AMS noise source, that can be used in ADMS. As known
that ADMS doesn't support noise sources in VHDL-AMS tell now. So I - with
the help of Joachim Haase- created a sin source that generates noise on the
original signal. I have posted it before. But the problem now, is I want
this source to interact with the simulator according to the domain of
analysis.
I mean that when working in the Transient Domain, No noise should
appear.Butwhen working in the Noise_Trans, noise appear. And also,
when working in AC
domain, no noise effects should appear. but in Noise domain, Noise effects
should appear.

The problem is that VHDL-AMS has only three types of domains :
QUIESCENT_DOMAIN,
TIME_DOMAIN, FREQUENCY_DOMAIN.

So, I don't know how to differentiate between frequency domain and noise
domain for example.

Thank you for your support,
Amro Tork