This's Bo from KGSO - CMT (central metrology team). I'd like to consult an issue for MU analysis after implementing Port Extension to NA (Network Analyzer). As you know, for some devices which couldn't be calibrated directly because they are in certain test fixture, we need to resort to "Port Extension". As far as I know the "Port Extension" just compensates the delay time and loss of the fixture, right? How about the uncertainty processing? I mean does our "VNA Uncertainty Calculator" ever consider this effect to final MU analysis? (I know there is a "remove adapter" option in spreadsheet when configuring the test, but haven't seen any "Port Extension Compensation" relevant option there...).