The ONLY time I've suggested a high gain omni was in cases where the customers are at the same level as the antenna. Things like down town deployments from a building that's no taller than the ones around it.
Or, sometimes inside a building where you need greater coverage on one floor. marlon ----- Original Message ----- From: <[email protected]> To: "WISPA General List" <[email protected]> Sent: Monday, February 23, 2009 6:26 AM Subject: Re: [WISPA] tower issue > 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" <[email protected]> > > Date: Mon, 23 Feb 2009 08:47:51 > To: 'WISPA General List'<[email protected]> > 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: [email protected] [mailto:[email protected]] 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 > <[email protected]>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" <[email protected]> >> To: "WISPA General List" <[email protected]> >> 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! 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