"I'm told that properly set up, sectors should not see each other loud enough to hurt."
Poppycock!!!!!! I can't post pics so here is some info from one of my towers. I shut down radio 3 so I could run a scan on an MT based ap. Radio 1 (sits on the same board as radio 3 but the antenna is 10 to 15" vertically separated) comes in at -46. Radio 2 is cross pol and 40 to 50' away comes in at -83. Radio 4 is cross pol and is 60ish feet away, -81. Oh yeah, all sectors are only 45*! Radios 1 and 3 are on the tower, radios 2 and 4 are on the building at the base of the tower. 2 is south west, 1 is south, 3 is south south east and 4 is east. There is nothing behind me. The highest radio output is 17dB as far as I recall. Here's the fun stuff, sigh. Travel lodge is at -74. The hotel is about 1.5 to 2 miles from the tower. Some day I'm gonna take the time to talk to them about their rotten internal system design! One called randys comes in at -78. There are no other structures (other than cell phone etc.) within less than 1 mile. Sectors are great, but they do have their drawbacks. marlon ----- Original Message ----- From: "RickG" <[email protected]> To: "WISPA General List" <[email protected]> Sent: Wednesday, July 01, 2009 8:36 AM Subject: Re: [WISPA] Antenna Recommendations Your question was my next one! I'm told that properly set up, sectors should not see each other loud enough to hurt. I'm sure the quad-sector tower I mentioned earlier in this thread can see the other sectors. I cant tell because it has prism cards :( Guess which tower is going to get the first upgrade :) -RickG On Wed, Jul 1, 2009 at 10:15 AM, Marlon K. Schafer<[email protected]> wrote: > That really depends Rick. > > The down side to an omni is that it picks up noise from all directions. In > some places though, there isn't that much noise so it's no big deal. > > They are also low gain so they don't "hear" the noise as well. > > Here's a question for you. Which system will see more known noise, three > omni antennas 10 miles apart, or three sectors on the same tower? > > marlon > > ----- Original Message ----- > From: "RickG" <[email protected]> > To: "WISPA General List" <[email protected]> > Sent: Tuesday, June 30, 2009 6:19 PM > Subject: Re: [WISPA] Antenna Recommendations > > > You taught me Marlon :) > > What I take home from you is: Stay away from omni antennas unless they > are low gain. Sectors are better. Keep power low. No amps. etc, etc. > > Doesnt using an omni to go 15 miles invite a lot of interference? > > (Still learning) > -RickG > > On Tue, Jun 30, 2009 at 12:32 PM, Marlon K. Schafer<[email protected]> > wrote: >> roflol >> >> We routinely go 15 or more to an omni. And we don't use amps and rarely >> even go all the way up to 36 watts eirp. >> >> Overall system design is important. Not just big omnis and amps.... >> >> Maybe I need to get out there and do some consulting work again? sheesh >> Who's been teaching people for the last 2 or 3 years? >> >> marlon >> >> ----- Original Message ----- >> From: "Robert West" <[email protected]> >> To: "'WISPA General List'" <[email protected]> >> Sent: Monday, June 29, 2009 3:13 PM >> Subject: Re: [WISPA] Antenna Recommendations >> >> >> 10 is a dream........... I know. But been thinking of going sector. Not >> many users there at the moment but replacing the antennas may be a good >> reason to upgrade the whole mess. Really only need a good 3 to 5 miles >> but >> further is always better for redundancy. >> >> >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of RickG >> Sent: Monday, June 29, 2009 1:32 PM >> To: WISPA General List >> Subject: Re: [WISPA] Antenna Recommendations >> >> I wouldnt use an omni to go 10 miles. Why not sector? >> -RickG >> >> On Mon, Jun 29, 2009 at 12:31 PM, Robert West<[email protected]> >> wrote: >>> Would like to get 10 miles out of it for overlap but can go less. >>> >>> -----Original Message----- >>> From: [email protected] [mailto:[email protected]] On >>> Behalf Of RickG >>> Sent: Sunday, June 28, 2009 11:42 PM >>> To: WISPA General List >>> Subject: Re: [WISPA] Antenna Recommendations >>> >>> How far do you need to go? >>> -RickG >>> >>> On Sun, Jun 28, 2009 at 2:24 PM, Robert West<[email protected]> >>> wrote: >>>> I'm in need to replace some older Omni antennas, 2.4 and 5.8, to >>>> connect >>> to >>>> a Mikrotik 600a. Running the R52H cards for both bands with a dish for >>> the >>>> 5.8 backhaul.. I'm not in the mood to experiment with the unknown, any >>>> recommendations on what is working for you? And what doesn't! Land is >>>> flat, rural farmland, small scattering of trees. We're up 70 feet in >> this >>>> location. >>>> >>>> >>>> >>>> Thanks! >>>> >>>> >>>> >>>> Robert West >>>> >>>> Just Micro Digital Services Inc. >>>> >>>> >>>> >>>> >>> >> ---------------------------------------------------------------------------- >>> ---- >>>> WISPA Wants You! Join today! >>>> http://signup.wispa.org/ >>>> >>> >> ---------------------------------------------------------------------------- >>> ---- >>>> >>>> WISPA Wireless List: [email protected] >>>> >>>> Subscribe/Unsubscribe: >>>> http://lists.wispa.org/mailman/listinfo/wireless >>>> >>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>> >>> >>> >>> >> ---------------------------------------------------------------------------- >>> ---- >>> WISPA Wants You! 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Join today! >> http://signup.wispa.org/ >> ---------------------------------------------------------------------------- >> ---- >> >> WISPA Wireless List: [email protected] >> >> 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: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! 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