Could you provide some sort of numbers? How much loss does that 1/4 mile of
water-retaining trees have?
The town is basically a square with the tower on the far west side in about
the center. It is 1/2 mile to the extreme corners, so there are a lot of
people 1/4 mile and less.
Someone on another list mentioned water retention as a show-stopper, but my
limited experience had me thinking just about anything less than a 1/2 mile
would work.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----- Original Message -----
From: "Graham McIntire" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Friday, June 22, 2007 11:25 AM
Subject: Re: [WISPA] 5 GHz attenuation
I have two towers running MT APs at 5.8 with CM9s and 16 dBi horiz
sectors. Using Osbridge 5GXi's as the CPE, I have clients a few miles
out with non-LOS and the occasional treeline without any issues.
I also have one house about 3/4 mile away from my tower that's going
through nearly 1/4 mile of scattered trees. It attenuates pretty
badly during heavy rain until the leaves on the trees dry out, but
stays connected. It's my parents-in-law's house, so they're a little
more forgiving if it happens to drop than a client would be ;)
Half a mile with scattered trees shouldn't be a problem for you, even
with snow/rain attenuation.
Graham McIntire
Verona Networks
On 6/22/07, Mike Hammett <[EMAIL PROTECTED]> wrote:
I have a 5 mile link where I'm not quite sure if the antenna is above the
trees or not as it is on top of a mast. That link is on the better side
of -80 for almost 2 years. Based on that I'd think I'd be okay at a half
mile or less. I figured that with most of the town at better than -60
and a
lot better than -50, I could stand to go through a few meters of tree,
but
that's why I came here to ask. ;-)
Based on the numbers on the site I looked at, 10 db of attenuation is 27'
of
foliage. That'd put 20 db at 55' of foliage.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----- Original Message -----
From: "Jack Unger" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Friday, June 22, 2007 10:22 AM
Subject: Re: [WISPA] 5 GHz attenuation
> Mike,
>
> Good to go as long as the TV towers allow you to get the CPE antennas
> above the trees.
>
> jack
>
>
> Mike Hammett wrote:
>> Most of my coverage area is open fields, so there isn't much to making
>> a
>> link work.
>>
>> I have an increasing demand to install an AP in a small town (no point
>> within town is further than 1/2 mile away from the tower site). I
>> prefer
>> to use 5 GHz due to the amount of spectrum available. An article I
>> read
>> said 1.5 db per meter of foliage or 20 db per tree in 5 GHz.
>>
>> The grain leg is 100 - 150 feet tall. Many houses have TV towers.
>> Radio
>> Mobile (not counting foliage) says the worst signal I can expect to
>> see
>> is in the 60s with most in the 50s or 40s.
>>
>> Safe to assume that most of the town will be good to go?
>>
>>
>> -----
>> Mike Hammett
>> Intelligent Computing Solutions
>> http://www.ics-il.com
>>
>>
>
> --
> Jack Unger ([EMAIL PROTECTED]) - President, Ask-Wi.Com, Inc.
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>
>
>
>
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