I am doing a PSS simulation of an oscillator with spectre which runs for pretty long duration for the oscillation to stabilize. I want to monitor/save only 4 nodes (say x1,x2,x3,x4) in the tran part of the PSS to prevent blowing up of the simulation data size. In the steady state PSS solution I wanted to save many nodes in addition to the said four nodes(x1,x2,x3,x4). Is it possible to save two different set of nodes for the tran part and steady state part in spectre?
I attempted the following solution:
save x1 x2 x3 x4
pss_run_aux (x1 x2) pss fund=var_fosc harms=200 errpreset=conservative save=selected annotate=status tstab=3m saveinit=yes relref=alllocal writepss="%C_tran.pss" strobeperiod=1/(16*var_fosc)
pss_run (x1 x2) pss fund=var_fosc harms=200 errpreset=conservative save=all annotate=status tstab=3m saveinit=no relref=alllocal readpss="%C_tran.pss"
removeTranpss shell cmd="rm -f %C_tran.pss" annotate=status
The first PSS(pss_run_aux) runs the tran part in which I save the four nodes in the raw directory. The second PSS(pss_run)starts from the data written by the previous analysis to compute the steady state pss data. However, I was not able to specify a seperate set of nodes to be saved for the second PSS analysis(pss_run) and I end up writing save=all.
Is there a way to save two different types of node sets for two different analysis within the same netlist?
Thanks in advance.