hi new KC901v owner here. sw ver 1.1.8, hw ver MB V1.2, RB V1.0.5... my issue is KC901V not showing correct resistance at near DC. the VNA will always start showing 50 ohm resistance and then gradually heading to the right resistance. for example, if i put 100 ohm termination at the coax end, it will start at 50 ohm [see attached picture]. can the device showing correct resistance at DC or near DC [100-500KHz]? i hope for firmware upgrade for this. waiting your reply thanks.