Re: Longdistance 5.8GHz p2p links: Low signal with17dbm :-(

Brett

You are my hero!!!!!

The trick with disabling ANY did work! Yeaaahh!!
Now I can work with my CM9 not even I need SR5!!
It's so niceI have a signal of -83 and a throughput of 8Mbps.
Before that the client did not even connect.

Thanks a lot that's the best tip I have heard in the last 3 years!!

Greetings

Beat

Brett Wright wrote:

>Hi
>
>The SR5 have a 7dBm power offset, so if you can get 19dBm with madwifi
>then you are really putting out 26dBm which is the max for the SR5. 
>
>If you are only able to get 17dBm, then look at your regdomain and
>channel selection. Have a look in ah_regdomain.c in the open hal and you
>will see that depending on channel/regdomain, etc, the tx power may be
>limited to 17dBm, so you could make some mod's to make sure you get the
>max out of the card.
>
>Also keep in mind that these cards only actually output 26dBm for the
>lower data rates, after which the output power will be more like 21dBm
>for the highest rates (check out the SR5 datasheet for details). So in a
>lot of cases 17dBm plus the 7dBm offset = 24dBm which is more than the
>card will put out anyway for the higher data rates.
>
>If you are getting signal strength of around -81dBm this should be quite
>workable - make sure you have ANI (i.e. interference mitigation) turned
>off as this will reduce the Rx sensitivity of the radio to the point
>where -81dBm may be too low. There have also been a couple of patches
>for ANI so make sure they are applied to whatever version of madwifi you
>are using.
>
>Hope this Helps
>
>Brett
>
>  
>
>>-----Original Message-----
>>From: Beat Meier [mailto:[email protected]]
>>Sent: Tuesday, 20 April 2010 9:57 PM
>>To: [email protected]
>>Subject: [Madwifi-users] Longdistance 5.8GHz p2p links: Low signal
>>with17dbm :-(
>>
>>Hello again
>>
>>I'm still stucking with the output power of 5.8GHz links.
>>Is there anyone who has modified madwifi hal to use full power of
>>    
>>
>5.8GHz
>  
>
>>band of ubiquity cards (SR5)?
>>I need a 25km link in 5.8GHz and I really want to use my wrap boards
>>with madwifi driver.
>>I tried to modify the madwifi hal but the output did not change :-(
>>Nobody is using longdistance 5.8GHz p2p links which needs more than
>>17dbm???
>>I have 81dbm and as we now madwifi won't be able to work with this in
>>5.8GHz :-(
>>It needs a level of at least 70-74dbm to work realiable...
>>
>>Thanks a lot for any hint!!!!
>>
>>Beat
>>
>>
>>    
>>
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