I don’t need the interrupted series of pulses. I can use continuous pulses so VPULSE is OK. I want to check how much burst demodulation take place at input transil depending on input circuit construction. I need .ic to not have to simulate too many pulses.
Each of ESD. Burst and Surge have faster rising than falling.
I use Spice very rarely. PSpice last time may be 10 years ago, and KiCad just few days at the 2023 end I spend mainly on editing symbols (as I prefer them) and learning how to assign models.
I have never been proficient in Spice and I am not familiar with possibilities KiCad-Spice duet gives.
Instead of using V sources and some functions you can probably use switch + LRC to get expected shape. But I don’t have a need to be it exactly as they are defined. I want only to compare different input solutions.