Hello,
I have bought 4 SXT ac, and planing using it as one AP to cover 120 degrees.
I worked with nv2 a lot before, for links from 1km to 55km. Now I wonna use it on ptmp.
What suggestions can You give me, for best results. Maybe some rate settings, TDMA settings, burst time, some chains settings. ?

I will use nv2, only-N, 20MHz channel, signals between -50 and -70dBm, both pol, and users will be 5/2 Mbps and 8/3 Mbps.

Thank You

Honestly, most of that is going to depend on your specific situation.

Best rates would be MCS 15 on everything, though that might not be possible. NV2 timings can be adjusted to mitigate interference, though in my experience it is still susceptible to interference. That is also specific to the the noise in your particular situation.