[CUWiN-Dev] Less RF output in the 5.8 GHz band too

[Sascha Meinrath]

Definitely let us know how the testing goes and if you see any difference. 
CUWiN currently defaults to using Channel 11, but if you find a 
significant degredation, we'll probably want to change that.  Also, what 
are the chances that BVWireless would be willing to use CUWiN's system as 
the basis for your network?  I'd be interested in hearing what the 
concerns/holdups are.

--Sascha

On Tue, 8 Mar 2005, Patrick wrote:

> I was reading one of the recent threads regarding poor 802.11b Channel 11
> performance.
>
> We noticed an identical issue in the 5 GHz band. We had been having
> trouble getting the backhaul links to operate, so we decided to try all of
> the channels suspecting that maybe there was a Ham radio operator that was
> blowing away our links.
>
> We think that there is a much lower RF power output at the higher end of
> the frequency band because we had significantly more signal strength (as
> measured by the receiving card) when we operated at the lower end of the
> operational range of the card (from 5.1 to 5.8 GHz). The nodes are close
> enough to each other (about 200 yards) where the difference cannot be
> soley better RF propagation characteristics due to the lower frequency.
>
> Our nodes currently use SOEKRIS 4826-50 boards with two Atheros-based
> radio cards (CM9) running our own software (Linux). One radio card
> operates at 2 GHz to provide 802.11b/g AP services to clients. The other
> radio card operates at 5 GHz for ppp backhaul links. Routing between the
> two radio cards is done onboard. Since we deployed these nodes (about a
> month ago) everything has been working great.
>
> We're didn't bother comparing the Channel 1 versus Channel 11 on the
> 802.11b band (2.4 GHz) because we have plenty of link margin (we burn
> through multiple walls of multiple townhouses with margin to spare) ...
> but ... we now plan to do some testing before locking in on a Ch 1, 6, 11
> scheme throughout oue neighborhood.
>
> Patrick Smith
>
>
>
>
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>

-- 
Sascha Meinrath
President                 *   Project Coordinator   *   Policy Analyst
Acorn Worker Collective  ***  CU Wireless Network  ***  Free Press
www.acorncollective.com   *   www.cuwireless.net    *   www.freepress.net