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2 Port Cal vs. 3 or 4 Port Cal

Question asked by jackzhu on Mar 12, 2009
Latest reply on Mar 15, 2009 by Dr_joel
Hi, we have both 8753ES 2 port, and 3 port (option H39) and E5070B. We use 2 port cal for 2 port VNA, and 3 port cal for E5070B. The calkit we use is 85033D. It seems the isolation from each network analyzers are quiet different? One concern is that we skip isolation for calibration. Is it the problem? Thanks