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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