Ubiquity NSM2 keeps disconnecting from router

I am trying to help a friend set up a point to point network between an office and their home. We have two Ubiquity NSM2 antennas. The antenna at the house side installed fine and we have a stable configuration. However the antenna on the office side has been a different story. I can watch the antenna port on the Meraki Z device where it is plugged into connect, then disconnect, then reconnect. There is all new wiring (pre made) cables from the Meraki to the power block and from the power block to the antenna. We thought that the power block might be the issue so we swapped it out with the working power block. Same issue. So thought the antenna itself may have issues so ordered a replacement. Same issue. we also tried a different electrical outlet just in case that was the issue. still connect / disconnect cycles.  

I am at a loss as to what to look at next. Any suggestions?