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The gridding algorithms are quite different in V17 compared to V14.8, so many options simply do not have a one-to-one conversion. The best strategy is probably to learn how to use the gridder in the GUI of SEMCAD 17 (in particular the Manual Grid Settings) and then use the "To-Python" function to auto-generate the corresponding Python scripts.

I don't know V14.8 well enough to answer your other questions from the top of my head and my current V14.8 installation is acting up, so I can't help with your other questions right now. I will as soon as I fix my setup!

@CEiber That's a very good idea, thanks a lot!

@farhana said in How do grid settings work?:

What is the relation between grid step and simulation period?

there is not really any relation. One is the about the distance between 2 grid lines, the other is the duration of the simulation (in physical units, not the time it will take for the simulation to run).

However, the time step is determined by the size of the smallest grid cell (a stability requirement of the FDTD method) and the number of time steps needed is determined by the size and number of simulation periods. So effectively, the total runtime depends simultaneously (and linearly) on both the grid step and the number of simulation periods.