I will close this interesting discussion. The initial goal was to reduce simulation time; my mistake, using "Marching Waves".I tried to reduce the burst frequency (150MHz to ~13MHz), without success; tried to save data after a delay; without success.I'm going to return to my first "solution": Split the diagram, adapt the I/O as best as possible and simulate each part separately; in my humble opinion, the only acceptable solution in my case, not having the possibility of acquiring a faster PC...Many thanks to everyone for your help and excellent information.
