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measurement problems

Question asked by santipito on Oct 6, 2008
Latest reply on Oct 9, 2008 by santipito
It's always necessary to perform a matching impedance when we're measuring the s parameters of a circuit. it is not suppose that the calibration  compensate the load match and the source match errors?
I say that because I'm measuring the S parameters of an operational transconductance amplifier and I don´t get the results that I hope.
Any clues?