Hello Martin,
Good point, indeed no duplex facility in the unit. You have to find a solution for your self. I have a second dish with RTL stick and raspberry PI and RTL_TCP server. I am synchronizing the Icom 705 with SDR console and Omni rig. In the field I can monitor by using the websdr and a phone. But for sure a duplex facility is missing. A build in downconverter to 2 meter can do the trick but it’s lacking
73 Rob