You’ll need ethernet to run between the main router and the EA7300. They already said they CAN'T run wired to the extender. As for those two modes, are we sure what they actually are? I'd think maybe one repeater the WiFi signal whereas the other just bridges the WiFi to the ...
The fix was having the WiFi signal from the router coming from behind the rig and not from the side. At my previous location the house faced West. My setup spot was out in the front yard so as the mount moved the antenna would get blocked by the OTA. My new residence faces NNW at...
If you have a weak Internet signal in the other room, sure you can add an extender. However if you have a strong signal, on extender is not necessary. I have 4 Apple TVs in my house and all work off of the same Internet signal. As my house is long and the router is on one end...