I done Uknown Thru calibration (both testport cable's endings male connectors) with my E5071C ENA using 85054D calibration kit and IFBW 10Hz. Thru component i used calkit f-f slotless adapter which electrical delay i measured earlier. Why transmission side S21 has such a ripple (see attachement) after measurement calibration? Testport cables are well fixed so ripple can't come from there. S11 and S22 results looks fine. I repeated whole calibration and checked all connectors, but results were totally same.