I'm new to NAvNet 2 having bought and installed a used RDP149 (10" screen) and RPD 148 (7" screen). I have a networking issue which I think is probably caused by new user error. I have the GPS antenna and radar into the 149 on the bridge and it works perfectly. Using the blue networking cable between the 2 "network" ports I have the 148 at the lower helm. I think I should be able to see and run both the radar and plotter on the 148 using its controls. I have the right IP address for the upper helm station. I know they are talking because the lower station shows the correct GPS position which I assume it is getting through the network. (or is there an internal GPS receiver in the units?) My issue is that whether I use radar or the plotter I get no picture or error message at the lower station 148. (like the **.** if you have the wrong IP address). Is there something simple to fix this? Thanks in advance.