I have tried to perform simple 1-port waveguide calibration with E5071C analyzer. When I have measured short , offset short and fixed load "done" button stays still grey and it can't select. Why so, even I have measured all needed components? I have never had such an issue with coaxial calibrations. Should I do something before waveguide calibration on the analyzer settings or what? In the end I tried to test X/R/K kit functions and same problem with them too.