That is what he is saying. Avoid the high gain 15dB omnis unless you know what you do and design system right. There are cases where a high gain omni is well suited but more then likely a 12dB omni would work as well if not better. You want to make sure your signal goes where your clients are not send the main portion above them where it does no good.
/Eje Sent via BlackBerry from T-Mobile -----Original Message----- From: "Rick Harnish" <rharn...@wispa.org> Date: Mon, 23 Feb 2009 08:47:51 To: 'WISPA General List'<wireless@wispa.org> Subject: Re: [WISPA] tower issue Actually, I disagree with Marlon on this one. The higher the gain on the antenna, the narrower the beamwidth. Therefore, many times your main lobe is shooting over the top of your clients. We have had better success with lower gain omni's because the beamwidth is wider and more usable signal reaches the client radios. I guess Marlon is correct if he means that the main lobe is shooting above (up) the clients, if that is what he meant, then he is correct. Rick -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of RickG Sent: Monday, February 23, 2009 12:24 AM To: WISPA General List Subject: Re: [WISPA] tower issue Marlon, I was thinking about what you said about high gain omni antennas sending more signal UP. With respect to direction, what's the difference between between a high gain unit and a lower gain unit? -RickG On Sun, Feb 22, 2009 at 10:34 PM, Marlon K. Schafer <o...@odessaoffice.com>wrote: > Not sure if it's related or not, but high gain omni antennas are usually a > great big no no. They tend to send more signal UP than in the direction of > the customers. > > I'd replace it with an 8 or 9 db unit just on principal. You'll probably > find that most customers will actually get a BETTER signal. > > laters, > marlon > > ----- Original Message ----- > From: "RickG" <rgunder...@gmail.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Sunday, February 22, 2009 7:23 PM > Subject: [WISPA] tower issue > > > > OK, here a good one! (aka, how I spent my weekend in a blizzard!) > > > > One of my towers has a single WARP/StarOS connected to a 5GHz grid for > > backhaul and a 15dBi omni for the local connections. > > On Saturday, after making some small changes, I rebooted it and it would > > not > > allow me to connect via wireless any longer - or my customers :( > > So, I go to the tower, connect up via ethernet and everything is a usual > > but > > I see all associations but only a few client have ip addresses. I can > ping > > the few clients but the packet loss is huge 80-90%. I then reload my > > backup > > but still get the same thing. I try changing channels, but still the > same. > > I > > then systematically begin replacing parts starting with the radio card. > > Eventually, I replaced EVERYTHING but still have the problem. One note: > > occasionally, twice of maybe three times, after a reboot, all came back > > normal. The third time, I left well enough alone for now but of course, > > you > > know what will happen the next time I reboot. > > > > Any ideas??? > > > > -RickG > > > > > > > ---------------------------------------------------------------------------- ---- > > 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/
