We are still unable to get 2 antennas to connect and we recently looked at altitude survey between the 2 locations and we noticed the one is +-30m higher and seperated by 4km. Do the antennas need to...

I have bought 2 cpe510 antennas in order to link my remote office to my home 3km away. I have it all set up and the direction done using google maps. On my first test i couldnt detect anything...