SR9 poor performance

I installed a single 13db 120 degree antenna / rb112 / sr9 AP. I am trying to do some test shots from a similar set up (dif is a 13db yagi) on my truck. Any shots above a mile are crap. I checked the connections, replaced the cables (LMR400 24in long) and still no dice. It is partially obstructed by a tree at the hill top (see tiktube.com , solar powered tower, its at the end). Couple of concerns, Should I go above the tree line? is the antenna signal so flat that been on a hill causing more problems (flat signal)? does the rb112 has enough juice to handle an SR9? please help.

I would rather try and move the SR9 higher giving better visibility with no obstructions.
Why don’t you install the SR9 higher to below the 3 sectors.

A friend of mine tested the SR9 with 20db Yagi on each end totally NLOS
Distance: 49 km
Bandwidth: 1-2 Mb/s
SNR >22

That is going to be a very narrow vertical beam. Try some downtilt as your client is likely underneath the main beam.

George