Are you in an industrial area with a lot of metal structures/buildings? You may be getting some major reflection going on.
>From my experience, a sector on the south side of a water tank, pointing to the south, will result in very little (if any) signal on the north of the water tank. Especially at a distance. I have, however, seen reflected signal do some crazy things. On Sun, May 3, 2009 at 4:22 PM, Kurt Fankhauser <k...@wavelinc.com> wrote: > I can verify that with a Tranzeo 13db HPOL antenna mounted on the east side > of a water tower pointing directly east that I can get clients connected on > the opposite side of the water tower that are within 1/8 mile to this > antenna.... > > Kurt Fankhauser > WAVELINC > P.O. Box 126 > Bucyrus, OH 44820 > 419-562-6405 > www.wavelinc.com > > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Tom DeReggi > Sent: Sunday, May 03, 2009 4:52 PM > To: WISPA General List > Subject: Re: [WISPA] Sector separation/isolation > > With the water tower in the middle, I find it really odd you are hearing > the > > other APs so loud. (With that much isolations I'm surprised you can't reuse > the channels). > > Is it possible you are getting near field reflections off of obstacles in > front of the sectors, which cause bounced to the other side of the tower, > and back to the sectors on that side? > > I have not used the Tranzeo antennas si Icant say good or bad about the,, > only thing I could think of would be maybe the Tranzeo antennas are not > that > > high quality to limit the beam width adequately? I personally talk highly > of > > Tiltek's good side isolation. It might be worth swapping out one of the > antennas with another brand to see how much the results change. > > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "Michael Baird" <m...@tc3net.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Sunday, May 03, 2009 11:11 AM > Subject: Re: [WISPA] Sector separation/isolation > > > > 1. UBNT PS2-EXT, Tranzeo 13db/120. > > 2. Water tower, mounted on catwalk railings. > > 3. No vertical, 20ft or so horizontal. > > > > Radios set to 23db tx, Antennas are 13db, should be under EIRP since we > > haven't compensated for cable connector loss. > > > > They are all horizontally polarized at the moment. > > > > Regards > > Michael Baird > >> I would agree with Michael that he's hearing the other AP radios to hot. > >> I saw beamwidths and positioning on radius posted. > >> Not sure if I missed it in earlier post, or not stated yet, but please > >> clarify.... > >> > >> 1. What brand/model APs and Antennas > >> 2. What type structure mounted to > >> 3. How much verticle and horizontal seperation between antennas. > >> > >> Also confirm radios are at legal tx powers, with EIRPs no higher than > >> 36db. > >> > >> Remember a 120deg sector only means that their is a 3db difference of > >> signal > >> at 120 degrees. Using 3- 120deg antenna will require additional > >> seperation > >> than just reliant on the antenna beamwidth. > >> This seperation can be verticle, horizontal, polarity, or physical > >> barriers/shields. > >> Note: with proper channel coordination, it is possible to get four 90 > >> degree > >> sector antennas on a tower, even though only 3 non-overlapping channels. > >> (not considering polarity). > >> However, I recommend not being locked into a specific channel plan, > >> therefore prefer to gain as much isolation other than channel choice. > >> If there is not adequate spacial or physical isolation, its necessary to > >> use > >> a lower beamwidth antenna. For example, if three 90 degree antennas were > >> used there would be less overlap between the three antennas. You'd still > >> cover 360degree, the signal would just be lower at the edges between > >> sectors. > >> > >> > >> Tom DeReggi > >> RapidDSL & Wireless, Inc > >> IntAirNet- Fixed Wireless Broadband > >> > >> > >> ----- Original Message ----- > >> From: "Ralph" <ralphli...@bsrg.org> > >> To: "'WISPA General List'" <wireless@wispa.org> > >> Sent: Sunday, May 03, 2009 10:10 AM > >> Subject: Re: [WISPA] Sector separation/isolation > >> > >> > >> > >>> Michael > >>> > >>> What hardware are you using for your APs? > >>> Is it something with all 3 radio cards in one enclosure? > >>> > >>> Ralph > >>> > >>> > >>> > >>> > > ---------------------------------------------------------------------------- > ---- > >>> WISPA Wants You! Join today! > >>> http://signup.wispa.org/ > >>> > > ---------------------------------------------------------------------------- > ---- > >>> > >>> WISPA Wireless List: wireless@wispa.org > >>> > >>> Subscribe/Unsubscribe: > >>> http://lists.wispa.org/mailman/listinfo/wireless > >>> > >>> Archives: http://lists.wispa.org/pipermail/wireless/ > >>> > >> > >> > >> > >> > > ---------------------------------------------------------------------------- > ---- > >> WISPA Wants You! Join today! > >> http://signup.wispa.org/ > >> > > ---------------------------------------------------------------------------- > ---- > >> > >> WISPA Wireless List: wireless@wispa.org > >> > >> Subscribe/Unsubscribe: > >> http://lists.wispa.org/mailman/listinfo/wireless > >> > >> Archives: http://lists.wispa.org/pipermail/wireless/ > >> > > > > > > > > > > ---------------------------------------------------------------------------- > ---- > > WISPA Wants You! Join today! > > http://signup.wispa.org/ > > > > ---------------------------------------------------------------------------- > ---- > > > > WISPA Wireless List: wireless@wispa.org > > > > Subscribe/Unsubscribe: > > http://lists.wispa.org/mailman/listinfo/wireless > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
