All points are 25db pacwireless grids.


--------------------------------------------------
From: "Chuck Profito" <cprof...@cv-access.com>
Sent: Friday, November 20, 2009 8:04 PM
To: <e...@wisp-router.com>; "'WISPA General List'" <wireless@wispa.org>
Subject: Re: [WISPA] Odd 5 ghz behavior

> How about putting a dish on the ap side, maybe with a dome,  would there 
> be
> enough lobe for the short hop?
>
> -----Original Message-----
> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
> Behalf Of e...@wisp-router.com
> Sent: Friday, November 20, 2009 7:18 PM
> To: WISPA General List
> Subject: Re: [WISPA] Odd 5 ghz behavior
>
> Sounds like one of the feed horns are bad or you have freznel blockage 
> that
> affects the link when drenched.
> Sent via BlackBerry from T-Mobile
>
> -----Original Message-----
> From: "MDK" <rea...@muddyfrogwater.us>
> Date: Fri, 20 Nov 2009 19:08:07
> To: WISPA General List<wireless@wispa.org>
> Subject: [WISPA] Odd 5 ghz behavior
>
>
> I have a backhaul feed that completely flips out when it rains.    But, 
> only
>
> when it rains heavy, and only for a short time.
>
> Yes, we took the cables apart, and no, there wasn't water in the cable
> connections.     But, water gets into stuff slowly, and ... err... stays
> there.
>
> This, will be perfectly fine and when a sudden rainstorm hit will go from
> working as it should to fully dead in minutes.   And, when the rain SLOWS
> (not stops), it comes back up again and will restore to full RSSI faster
> than I can get to it.   Pacwireless grids at both ends, vertical
> polarization, and no noise that I know of, other than self inflicted, if I
> set stuff wrong.      This is a shared backhaul...  One end is 13 miles, 
> one
>
> is 3 miles.   The near one is off the edge of the beam a bit, mostly due 
> to
> elevation settings, and being off the center of the beam by 5 or 6 degrees
> horizontally.    The AP end sees the clients go weak and vanish.    Both 
> of
> the client ends see the same thing.    If it stops raining, or slows to a
> spit, by 20 minutes we have good RSSI and the quality starts back up.
>
> The quality falls first, then RSSI when the link starts to fail.
>
> I'm baffled by this behavior, and have replaced the radio, pigtail, pulled
> the cable ends off to inspect for water, and didn't find any.   But, where 
> I
>
> HAVE had water leaks, the water gets in, the link dies, and stays dead.
> This changes quickly, having a few minutes lag behind a storm.   For
> instance, a sudden 20 minute downpour will see the link die, but by the 
> time
>
> it stops raining and I can drive the 10 minutes to the site, it's up and
> RSSI is fine.
>
> I have 2 other nearly parallel links at the same site, none of them seem 
> to
> have this behavior.  I do notice smallish losses in RSSI during hard 
> rains,
> but nothing like going from high 60's to "can't detect" in minutes.
>
>
>
>
>
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