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Stability Measure

Question asked by Dragan on Nov 1, 2010
Latest reply on Nov 1, 2010 by Dragan
To measure Stability Factor on PNA-X Network Analyzer I use 'kfac(S11,S21,S12,S22)' pre define function but for Stability Measure function does not exist. So I typed in Equation Editor '1+Pow(re(S11),2)-Pow(re(S22),2)-Pow(re(S11*S22-S21*S12),2)' based on formula
b=1+sqr(|a|)-sqr(|d|)-sqr(|a*d-b*c|) but result is not correct.
Please advise.
Dragan.  

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