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Calibration problesm with TRL* on VNA 8722ES

Question asked by Jason1969 on Aug 10, 2010
Latest reply on Aug 14, 2010 by Jason1969
I performed TRL calibration on 8722ES, 8720D and other VNA models, using VNA Help Cal Kit Manager (ckman). Unfortunately, the VNA with TRL* options shows unacceptable residual ripples whereas the VNA with TRL (without the star) performs well. What is the problem with TRL* on 8722ES with the latest Firmware revision dated October 30, 2002?