Has anyone tried to measure materials using the Stack Transmission Mu and Epsilon Model in the N1500A software? I am looking for some examples or general measurement advice to perform a free space measurement using this model as the help file does not provide much information. I am attempting to measure some magnetic absorber material sheets in the 1 to 6GHz range in order to determine both permittivity and permeability. Can this model handle measure this type of lossy material or is there a better standard method? I have been able to measure Rexolite (eps=2.54, mu= 1) with this method but not the magnetic absorber material (expected eps@20, expected mu@5). Does it matter if my known dielectric material permittivity is lower than the material that I am trying to measure? Does the thickness of my known dielectric compared to my sample material under test thickness matter? Thanks for any information you can provide.