It does indeed seem strange that some models in rfLib have hidden state and therefore do not work with SpectreRF but there is an explanation. The only elements in rfLib with hidden state are the instrumentation blocks. The instrumentation blocks generate common baseband signals and compute statistics on baseband signals. Those blocks were designed for use with the baseband equivalent models also found in rfLib. The baseband equivalent models accelerate run times, at the cost of some accuracy of course, to the point where eye-diagram and evm simulations have practical run times. Many of the models have baseband and passband views. The idea was that you could use the faster baseband view with the instrumentation blocks in Spectre to study RF effects on baseband metrics then switch to the passband view and SpectreRF to compute the associated RF specifications.  

-Jess Chen

Yes, for this purpose it is rather annoying.

There's a relatively simple workaround for the generators
though.

Place an instance of the signal generator in a schematic,
and run a normal transient analysis.

Then use the printvs function in the calculator on the
output of the block (don't use start, stop and step in
the printvs form), and then use File->Print to save the
output data to a file.

You can then use a vsource with type pwl (or vpwlf),
or port with source type pwl, to read the data you
saved in the previous sim and use that in an envlp
analysis.

A bit of a hack, bit it works.

I believe there is an initiative to solve the hidden state
problem (probably by fixing the models in the short
term) .

Regards,

Andrew.