do the ususal stuff...

Try changing channel ?
Try to shrink the channel to 10mhz or 5mhz

Any possibility of water in the cables  ? or something phyiscally off 
with the coax jumpers ? (AP side ?)

Since you have done everything on the far side. how about looking at the 
AP Side....


Run ...Airview to see if there is interference that is not being picked 
up on site survey ?

Faisal Imtiaz
Snappy Internet&  Telecom

On 8/5/2010 4:01 PM, RickG wrote:
> Here is a good one!
>
> I have a short "link" of about 3 miles from my main tower to another.
> On the main tower I have four UBNT 5G-20-90's with RockeyM5's running
> firmware 5.2. All have performed very well since I installed them
> earlier this year. On the other end at the problem tower I have a 26Db
> grid with a BulletM5 also running fw5.2. The link was doing well until
> two days ago. Then, the latency went through the roof. I assumed it
> was the radio but after switching it out twice, I decided to blame the
> antenna. So, I swapped out the grids multiple times. Then decided to
> try a Nanostation, and a Nanobridge but got worse results. I'd blame
> the sector on the main tower but another link on it remains working
> well. There is a topology difference between the working link and the
> poor link with the later being higher. There is some noise in the area
> but not unusual. What I do note is that the main tower does not "see"
> the far end very well (-78) and it should really be much higher. The
> receive rate is only 6.5Mbps.
>
> At any rate, I've got about 3 dozen subs on this tower and worked on
> it until 5am so I'm ready for some fresh input!
>
> Thanks in advance!
> -RickG
>
>
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