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Why use hi src pwr on Port 2 to do S12 measurement for Amp?

Question asked by DeeLau Employee on May 24, 2007
Latest reply on May 28, 2007 by DeeLau
When doing Power amplifier measurement via PNA, I understand use low source power on port 1 as to not damage the B receiver.

    But I don't understand why use high source power on port 2 to get
valid S12 measurement or enough power at the A receiver.

    Many thanks.