Please can you tell us the TX output power in db that you are using?We have a 70km link with SR5 + 1m dishes - it is rock solid and gives 10Mbps+. What nearly caught us out was 'curvature of the earth' - this adds about 100m to your height requirement over 70km. Fresnel zone is just 30m at 5.8Ghz - so you need height of about 130m+. However, if you have the height we were amazed how easy it was.
Yup but the bigger (antenna) the higher db. I am asking you this because in some countries there are output power limitations. So I was wondering how much dbs you are using (antennas + wireless card). For example 28db antennas (at 5ghz) are common but if the output tx is over 3 or 4 dbs (considering some cables and connectors attenuations) we are over the 30dbm which is the legal maximum limit. So that's why I am askingSome of our links at 65 km have throughput of 50 Mbit/s tcp.. The main thing is "The bigger the better", but we don't use antenas greater than 2 meters. You have to have very low loss cables, a good feed. This link has the same throughput with CM9, put we've upgrated put SR5 just to be sure that the link will be stable in the winter
this is the answer :Hello samsoft08
First of all, most in the wireless industry will say that WiFi amplifiers will do more harm than not. The worst thing about them is they amplify not only the output signal, but all so the noise being received by your WIFI radio device. I have not needed to use them to date so can not comment to much.
What type of antenna are you using?
The type of coax and the lenght?
Did you make them yourself?
Have you done a scan in both areas for other WiFi repeaters etc? You may have some interferance.
What are you current signal strenghts?
You can use 5.8Ghzwell , be sure that in my city ( Baghdad ) there is 100's of wirless clinets and wisp , some of the wisp's using power up to 4W !!!!!! i'm sure there is an interference , the question is how to overcome this problem ?? i cannot say its a bad link , coz its good for hours before hang up !!!! restarting the d-link solves the problem ..