H/V interpretation of results

[IgnazioC]

Hello,
I'm tring to develop my own excel speadsheet to verify sesame reliable peak criteria.

I heve some doubts about the VI clarity criteria:
in sesame project guidelines is said "SA(f) is standard deviation of AH/V(f), SA(f) is the factor by which the mean AH/V(f) curve should be multiplied or divided".

So it seems simple to define standard deviation, SA(f): once you define A0, you get AH/Vmin and AH/Vmax values from the minimun and maximum dashed curves, and after you can define SA(f).

But some commercial softwares seems to define SA(f), in a different way.

If you consider example 1 (1st commercial software), you can see that:
A0= 3,98
Amin≈3,6
Amax≈4,3
SA(f)=0,3892
The SA(f) value seems to be defined as A0±SA(f) and not as A0*SA(f), A0/SA(f), as it should be. If we use the SA(f) definition it should have been SA(f)≈ 1,09

Same happens with example 2 (different commercial software):
A0= 3,0
Amin≈2,6
Amax≈3,3
SA(f)=0,346
The SA(f) value seems to be defined as A0±SA(f) and not as A0*SA(f), A0/SA(f), as it should be. If we use the SA(f) definition it should have been SA(f)≈ 1,126

Both softwares are used in different countries so I can't believe that they are doind it wrong, so What do i miss?

I have also a question about *.hv file:
after we save result of our analisys as *.HV, in the header of the file you can find this lines:
# GEOPSY output version 1.1
# Number of windows = 10
# f0 from average 6.0293
# Number of windows for f0 = 10
# f0 from windows 5.51133 4.85492 6.16774
# Peak amplitude 2.88469

where in f0 line you can find f0+-standard deviation, but the same thing doesn't hapen on the peak amplitude line (A0*St.dev and A0/st.dev in this case).
As you can see in "peak amplitude and st.dev" file attached, we know for sure that geopsy already defines those values, so maybe I need to set something to make them be saved in *.hv file?

Thank you for your answers