Re: [Madwifi-users] [Fwd: 802.11a, CM9, distance - doing my head in]

[Derek C. <de...@ri...>]

Hi Daniel,

Its funny because on the same roof (as the "master") I have another 5Ghz 
link with a WRAP board running StarOS and its going longer distance - no 
problem with that link - but I am using 20db MESH antennas on that link.

I'm using 15db planar antennas with a 30 degree beam width but I did 
also try 20db MESH antennas before with no luck too.  I've also tried 
this at different locations always with line of sight.

But I'm using 15db 2.4Ghz planar antennas too and I'm going 10 miles on 
a link.

I really feel its something to do with MadWifi and links over a certain 
distance (somewhere after 1 mile this problem is happening for me).

Derek

Daniel Schmitt wrote:
> Derek Conniffe schrieb:
>> I've found that it doesn't seem to make any difference what I set the 
>> distance to with athctrl -d - I've tried 5,000 - 100,000 metres.  I 
>> did read about setting the distance somewhat more than the real 
>> distance.
>> But still the same problem - the "managed" box sees the "master" box 
>> with iwlist scanning but it just doesn't associate
> I had a slightly different problem:
> When I tried to associate a 5 GHz net, my assiciation dropped after a 
> few minutes and came back soon.
> After I tried athctrl with a distance less than the real communication 
> distance it worked perfectly for me.
>
> Sometimes there are problems with the noise and the quality of the 
> signal, too.
> It does not mean that you can communicate good if you have -65dBm. I 
> have problems with "cheap" antennas. I have -65dBm here, too but 
> cannot get a connnection. If I use a expensive antenna made in 
> Switzerland (Huber & Suhner) then it worked ...
>
> Daniel