I have to measure the S-parameters of an unequal dual-band power divider using VNA. The input impedence of the power divider is 50 ohm, but the output impedence of it is different than 50 ohm. is there anyway that I can set the impedences of the two ports of the VNA seperately during the calibration? if not, is there anyother way to test unequal-split power divider ? can anyone please help me about this?