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Agilent application note 5988-9477EN

Question asked by Lucux on Dec 17, 2012
Latest reply on Dec 21, 2012 by drkirkby

when I read application note 5988-9477EN, on page #3 there is a paragraph saying the below,

On the other hand, the opens and shorts should be as close
to being 180 degrees out of phase as possible over the entire applicable
frequency range to minimize calibration errors using the SOLT calibration

does this mean in SOLT, the short and open has to be the same s11 delay in order to minimize calibration errors? what is the correct understanding?