You should be able to get a signal reading from all 3 satellites regardless of which of the 3 ports you are connected to on a 1k2 lnb. I use a super buddy signal meter to do this on a daily basis. The lnb has a switch inside that will allow you to access any of the 3 satellites on any port. My signal meter can toggle that switch and change from one satellite to another allowing me to get signal strength by only clicking a button on the meter without having to plug into any other port.