60GHz - 4330 meters - my experience
First of all, if You don't want to read my whole post, conclusion is don't do it - maximum reliable is 3000 meters.
Finally we had some sunny and warm days in Serbia. So I reserved whole weekend for 60G links. First of all, You need a lot of patience. When this long link got disconnected for more than couple of minutes it takes anywhere from 30min to more than 2 hours to get back online! I don't know why? Reboot, unplug/plug din't give any results.
We combined LHG60 with SolidMount, and that is a MUST on any 60G link that is 1000m+.
When You adjust the link use bandwith test between two devices. It is powerfull enough to let UDP trafic spread it's wings. TCP got stuck arround 500Mbit with 100%CPU.
Don't look at the "rssi". You only need MCS (max is
, SIGNAL (100 is ideal so I assume that is in %), and try to get TX-SECTOR to center. Also Error rate is crucial!
Don't use "align" since it disconnect link more often. Use only "monitor" tool.
One person should be at the antenna and another should look at the notebook. First get 60G link to any working order with eye sight. I know that it could be difficult for someone, but LHG60 have mesh grid and it is see-through. Then You need wrench 10mm to finetune solidmount. It takes half of the turn to lose signal. So it should be fastened to maximum allowed to turn the wrench.
And then start to play. Don't be afraid to try different things and positions. Most annoying is when You got disconnected for more than a minute! Than it takes forever to get connected again. It is not a matter of misalignment at all since once we got disconnected for 2 hours and after that link got connected and we had MCS 7 and Signal 80. Bandwith test was 900Mbit.
Next day it got very windy, and link got worse. I was thinking what is somehow moved, but after wind has stopped link got OK again. Also rain is killing this link, but 2950 meter link is holding OK in wind/rain.
Now winter came back in Serbia for a few days, and on first warm day I will take down this 4,3km link since it is useless on that distance.
BR to all and good luck (You will need it - at least until Ubnt start to sell 60GHz)