Cable length to AP 1 foot, I'm not sure what type of cable is installed, presumably LMR-400. I will check on this as well.
The Water tower we are using for testing is located on the outskirts of the town. The town itself has about 4 businesses, no stoplights, looks like about 10 AP's in the whole town, population about 800 folks. The land is as flat as a pancake, no hills or great obstructions, minimal treelines. Regards Michael Baird > Whats the lenghs of the cables? They could be acting as antennas themselves. > > 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 os10ru...@gmail.com > Sent: Sunday, May 03, 2009 8:52 PM > To: WISPA General List > Subject: Re: [WISPA] Sector separation/isolation > > What kind of cable are you using between the APs and the antennas? > > On May 3, 2009, at 8:27 AM, Michael Baird 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! 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! 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