I do not know about the MikroTik wireless cards, but with some other equipment we have had we saw some trends that might give you a rule of thumb.
Anything worse than -85 signal, and we began to see issues, even if there was no noise. The receiver sensitivity will have a lot to do with this, and you can generally find what is published for the radio card you are using.
The other thing was the signal to noise ratio.
If we had -50 signal, which is great, but -55 noise, we could never do anything. The gap there is 5. Anything below 10 and we just started losing packets no matter what we did.
Again, this is equipment specific, but it might give you some very general numbers to look at.
We changed from horizontal to vertical at a lot of locations because of this. While our signal stayed the same, or in some cases dropped a little, we generally had a 10 to 30 drop on the noise across the range of clients.
That meant our ones with a 5 or 6 gap on the noise suddenly had at least a 15. Many times they got even more than that. And once the ratio was wider, they got great throughput.
Last edited by cybertime
on Mon Dec 20, 2004 9:59 pm, edited 1 time in total.