Thanks Stan!
I take it that also means that I shouldn't place two directional antennas
in essentially a Y pattern side by side or one over the under unless
they
are also 3 feet apart?
I have a wide outdoor area to cover (entry to large animal hospital) .
I have
an ideal spot to locate two AP's. However in order to keep outdoor wall
penetrations to a minimum we were going to use one penetration
and place the one antenna pointing southwest and one northwest.
Sounds like I need to rethink this one.
Thanks again!
Rick
Stan Brooks wrote:
When co-locating APs for user density/capacity, they should be on
non-overlapping channels (1/6/11 for 802.11b/g) and should be spaced
some distance (3 feet is a good rule of thumb) apart from one another.
This applies to both 802.11b/g and 802.11a.
The reason you want to do this is to minimize interference between
APs. Even though the APs are on non-overlapping channels, there is a
small amount of RF energy that does overlap and interfere. By
physically separating the APs, this interference is reduced (by
free-space loss) to a tolerable/negligible amount. 3 feet gives about
40 dB of free-space loss at 2.4 GHz to "assist" the guard band
separation between channels.
>>-> Stan Brooks - CWNA/CWSP
Emory University
Network Communications Division
-------- Original Message --------
From: Rick Brown
Date: 3/27/2006 4:51 PM
We are using Cisco 1240 series AP's. I seem to remember
an instructor for Terrawave saying that when clustering AP's
for user density to space them approximately 3 ft a part.
I don't remember if the recommendation applied to 802.11G
or to 802.11A. Does anyone remember any such recommendations?
Example: AP 1 < 3ft >
AP2
3ft 3ft
AP 3 < 3ft >
AP4
Thanks!
Rick
--
Richard E.(Rick) Brown (919) 515-5489 office
Network Systems Engineer (919) 515-1641 fax Communication
Technologies email: [EMAIL PROTECTED]
N.C. State University
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--
Richard E.(Rick) Brown (919) 515-5489 office
Network Systems Engineer (919) 515-1641 fax
Communication Technologies email: [EMAIL PROTECTED]
N.C. State University
**********
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