After doing a momentum simulation to create a dataset (.ds) s-parameter file, I get the following verbiage in the simulation window:
S-parameter simulation finished
...writing dataset files
The 62 port simulation itself takes about 30 minutes to complete. But the "...writing dataset files" portion literally takes hours.
What's going on? Is there a way to speed this up?
The resulting dataset files are about 18MB, but that does not seem large enough to take hours to write.
S-parameter simulation finished
...writing dataset files
The 62 port simulation itself takes about 30 minutes to complete. But the "...writing dataset files" portion literally takes hours.
What's going on? Is there a way to speed this up?
The resulting dataset files are about 18MB, but that does not seem large enough to take hours to write.
One solution to circumvent this problem is to create a layout component for the design (with the Momentum setup that you want to simulate), include this layout component in a schematic design and do the Momentum simulation using co-simulation. This will generate the Momentum results but will not create the dataset file you would otherwise get when launcing Momentum from layout. You will of course get the dataset corresponding to the circuit simulation that you used.
Given that you have 62 ports, you probably want to connect components to the layout component, which is something you can do easily in the schematic design.
Another solution is to set the following variable in the momentum.cfg file: ($HOME/hpeesof/config/momentum.cfg)
MOM3D_WRITE_AFSDATASET=FALSE
When doing the Momentum simulation from layout, you will not get the AFS dataset, but you will get the dataset with the simulated frequencies. The AFS result is still available in a CITI file format in the file:
[project_prj]/mom_dsn/[designame]/proj.afs