I would get into the RDP148's Install Wizard, and check to see the correct Antenna Type is selected for "A". This is the correct selection for the RSB110-070 2.2 kW Radome.
Then I would check if the Antenna Rotation is set for - "Rotate".
I run the setup wizard but 1 and set the ip for the radar as the manual says, but then i cant enter the Radar setup, so i guess i dont have any communication at all whit the radar dome, will open it upp and se if i can find anything.