Just because an antenna is pointed east does not nothinh bleeds west of the antenna.
If you don't want them to see each other you'll want a good 10 foot difference (vertically). On 5/3/09, Michael Baird <m...@tc3net.com> wrote: > Yes, I tried the 10mhz/5mhz channel widths, per recommendation, the AP's > still saw each other at similar signal strengths (w/antenna). I will see > if I can check the rest of the stuff, there is no vertical separation > either as another recommended, the antennas themselves are at least 20 > foot apart. They are on 3 sides of a water tower, with the water tower > in between. I didn't install the equipment and haven't been up on the > tower, so I can't say firsthand how it has been installed. Can you give > me a rundown of how it should be installed, so I can know what to look > for. Defective antenna is an idea though, they are Tranzeo 120's, the > sectorization barely works at distance. I can see all 3 AP's at each > sector 7 miles away, can peer with two of them, associate with all 3, I > think this is wrong. I think I should only see one, unless I'm at the > overlap point. > > Regards > Michael Baird >> The problem of the APs seeing each other could be due to unusually >> high signal leakage (defective antenna, coax, enclosure etc resulting >> in poor shielding/signal leakage). If that's the case the equipment >> should be performing better than it is (less mutual interference) and >> for some reason it's not. You'd have to investigate and/or swap out >> gear to find the problem. >> >> Or is it that the equipment and install are all good and this is >> normal due to the proximity? If it's proximity then physical >> separation and/or frequency separation is the only thing that will >> help, hence the suggestion of using narrower channels and moving the >> antennas from previous posts. >> >> Did you try going to 10 MHz channels? >> >> Can you disconnect the antenna and put dummy loads on the ends of the >> coax and see how strong the APs can see each other? If the problem >> goes away then it's either a) defective antennas with too much leakage >> or side/rear lobes) or b) antenna proximity. >> >> Greg >> >> On May 3, 2009, at 7:13 AM, Michael Baird wrote: >> >> >>> I think I didn't explain my problem clearly. 10mhz/5mhz channel sep >>> makes no difference on how each AP see's each other on a site survey >>> on >>> the tower. I want to isolate the sectors from each other in a better >>> way, they are too hot to each other and too much overlap. I was >>> looking >>> for good ways to do it, I have no noise problems to clients, and my >>> channels on the 3 AP's are 1/6/11, none overlapping, and all with -100 >>> noise floor's. >>> >>> Regards >>> Michael Baird >>> >>>> Right now channel 1 uses channel 1, 2 and 3. Channel 6 uses 4-8. >>>> When >>>> you go to 10MHz channels 1 will use 1 and 2. 6 will use 5, 6 and 7. >>>> Therefore, you are no longer on adjacent channels, there is a gap of >>>> channels 3 and 4 between. >>>> Also, you will cut down on the amount of other noise you hear because >>>> you listen to only half as much spectrum. >>>> And, you will have more effective power so noise may be less of a >>>> problem. >>>> >>>> I am sure there are some RF savvy folks out there that can explain it >>>> better. >>>> >>>> Michael Baird wrote: >>>> >>>> >>>>> I can try that, can you tell me why that would make a difference >>>>> though >>>>> with the AP's seeing each other at such signal levels? Will >>>>> changing to >>>>> 10mhz channel width's cause the AP's to see each other at a lower >>>>> RSSI? >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> >>>>> >>>>>> Use 10mhz channels instead of 20mhz. >>>>>> >>>>>> 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 Michael Baird >>>>>> Sent: Saturday, May 02, 2009 6:54 AM >>>>>> To: WISPA General List >>>>>> Subject: [WISPA] Sector separation/isolation >>>>>> >>>>>> We are still experimenting with aligning sector's on our towers. >>>>>> We are >>>>>> attempting to use 3 120 degree/13db/6.5 vb/7 degree downtilt, >>>>>> antennas >>>>>> to cover 360 degrees. I just inspected the towers myself, and >>>>>> noticed >>>>>> they are setup at 30 degrees/150 degrees/290 degrees (so they >>>>>> aren't >>>>>> right exactly). So the problem that caused me to inspect the >>>>>> tower was >>>>>> the signal level I can see the other AP's at. >>>>>> >>>>>> AP 30 can see AP 150 at -39 and AP 290 at -42. >>>>>> AP 150 can see AP 30 at -42 and AP 290 at -70. >>>>>> AP 290 can see AP 30 at -39 and AP 150 at -65. >>>>>> >>>>>> So I'm guessing that the reason 150/290 are much higher is >>>>>> because of >>>>>> the additional 20 degrees between them. These AP's are on channels >>>>>> 1/6/11, I'm wondering if I should worry about seeing the other >>>>>> AP's with >>>>>> such a hot signal, and if so what are some good ways to isolate >>>>>> them better. >>>>>> >>>>>> Regards >>>>>> Michael Baird >>>>>> >>>>>> >>>>>> ---------------------------------------------------------------------------- >>>>>> ---- >>>>>> WISPA Wants You! 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