# What are the proper parameters of SEXS excitation model?

I found a set of parameters of SEXS excitation model in a thesis. But when I put them into PSS/E, it turned up some warnings about the settings as follows. But I don't know why these warnings showed. I wondered what the proper range of each parameter is. Please help me with this problem!

I would appreciate it very much!

Parameters of SEXS: TA = 1; TB = 4.0 K = 200 TE = 0.02 EMIN = -4.6000 EMAX = 6.0