Thank-you Fredrik for your so fast answer.
I have already read the document that you have pontented to my attention.
Unfortunately, differently from what shown in the clip, nothing seems to be there related to the antenna ground network (I was especially interested in it) and to the special settings of the first mast (elevated ground plane and – If I’m not wrong visiting it two weeks ago – different vertical radiator setup).
Do you have maybe some document in English to share related to this topics ?
Thank-you very much for any help
Ugo Poddine (IU1IPB)