We sent an installer out to repair a faulty AP. I told him to use the same pigtail/lightning arrestor/radio combo to the existing antenna. He "forgot" the pigtail, but the lightning arrestor and radio connection don't seem to be the problem at least.
The antenna he attached to was a Tranzeo 120/16db sector at 1.4 degree's tilt (had him measure), we are deploying on the trouble tower Maxrad MB 13db WISP24017MBH at 7.8 degree downtilt. Maybe the antenna is the problem? I realize (surprisingly) they are different DB, but I would expect my signal problem to to show up in RSL/TSL, not just in RSL at the AP. Regards Michael Baird > We use them commercially. I think we have replace. 2 of them over the past > 18+ years > Sent from my Verizon Wireless BlackBerry > > -----Original Message----- > From: Israel Lopez-LISTS <ilopezli...@sandboxitsolutions.com> > > Date: Thu, 18 Jun 2009 09:23:20 > To: WISPA General List<wireless@wispa.org> > Subject: Re: [WISPA] Radio Seperation > > > Whats your life expectancy on those polyphasers? Their website states > they are good for multiple strikes, but just wondering about the > durability. etc,. > > -Israel > > David Hulsebus wrote: > >> Same here, Polyphasers. No more gas tubes. I hate getting a call that I >> have to climb a water tank because a storm knocked out a gas cartridge. >> >> >> >> Kurt Fankhauser wrote: >> >> >>> That’s why I quit buying lightning arrestors with "gas tubes" in them. Too >>> much worrying if the gas tube was blown or not, so I started buying >>> polyphaser's and never looked back.... >>> >>> 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 David Hulsebus >>> Sent: Thursday, June 18, 2009 11:45 AM >>> To: WISPA General List >>> Subject: Re: [WISPA] Radio Seperation >>> >>> I've had the quarter waves that take multiple strikes go partially out >>> in the past. Gas tubes have just blown. >>> >>> Dave >>> >>> RickG wrote: >>> >>> >>> >>>> On that note. Can lightning protectors go partially bad or are they like a >>>> fuse and either work or not? >>>> -RickG >>>> >>>> On Thu, Jun 18, 2009 at 12:50 AM, Marlon K. Schafer >>>> >>>> >>>> >>> <o...@odessaoffice.com>wrote: >>> >>> >>> >>>> >>>> >>>> >>>> >>>>> Even so, the performance should be the same both ways, not tx vs. rx. >>>>> >>>>> I still think he needs to look at the lightning arrestors. Not sure how >>>>> they could make a difference but that's the one thing that's unknown to >>>>> >>>>> >>>>> >>> me. >>> >>> >>> >>>>> marlon >>>>> >>>>> ----- Original Message ----- >>>>> From: Travis Johnson >>>>> To: WISPA General List >>>>> Sent: Monday, June 15, 2009 12:05 PM >>>>> Subject: Re: [WISPA] Radio Seperation >>>>> >>>>> >>>>> Hi, >>>>> >>>>> I have to agree with Gino here... even at 7 degree downtilt, you are >>>>> cutting it very close. You may want to try 5 degrees on just one sector >>>>> >>>>> >>>>> >>> and >>> >>> >>> >>>>> see if that helps. >>>>> >>>>> Travis >>>>> >>>>> >>>>> Michael Baird wrote: >>>>> Gino, wisp-router.com, would the downtilt affect the AP RSSI level? >>>>> >>>>> Antenna Height >>>>> ft >>>>> Downtilt Angle >>>>> ° >>>>> Vertical Beamwidth >>>>> ° >>>>> Results >>>>> Inner -3dB Radius 0.1 Miles >>>>> Sweet spot 0.2 Miles >>>>> Outer -3dB Radius 5.24 Miles >>>>> >>>>> >>>>> I told him 7.8, but I'm sure he didn't get dead on, just the best he >>>>> could with his inclinometer. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> Where are you running the calcs? I use >>>>> http://www.wirelessconnections.net/calcs/AntDowntiltCalc.as >>>>> >>>>> With your input, I get main lobe 0.2 miles / -3db @ 7 >>>>> >>>>> Gino A. Villarini >>>>> g...@aeronetpr.com >>>>> Aeronet Wireless Broadband Corp. >>>>> tel 787.273.4143 fax 787.273.4145 >>>>> >>>>> -----Original Message----- >>>>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >>>>> Behalf Of Michael Baird >>>>> Sent: Monday, June 15, 2009 1:51 PM >>>>> To: WISPA General List >>>>> Subject: Re: [WISPA] Radio Seperation >>>>> >>>>> Gino, >>>>> >>>>> 145', 15 degree VB, 7.7/7.8 puts my -3d at ~5 miles. If my downtilt was >>>>> wrong, I would think it would impact the receive on my CPE's, much more >>>>> then on the tower AP's, maybe that's a poor assumption on my part >>>>> though. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> I think your downtilt is too much, whats your area and tower height? >>>>> The beamwidth of the maxrad sector? >>>>> >>>>> >>>>> Gino A. Villarini >>>>> g...@aeronetpr.com >>>>> Aeronet Wireless Broadband Corp. >>>>> tel 787.273.4143 fax 787.273.4145 >>>>> >>>>> -----Original Message----- >>>>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] >>>>> On Behalf Of Michael Baird >>>>> Sent: Monday, June 15, 2009 1:29 PM >>>>> To: WISPA General List >>>>> Subject: Re: [WISPA] Radio Seperation >>>>> >>>>> My sector's are Maxrad adjustable sector's horizontally polarized, >>>>> adjusted to 120/13db, at 7.7 - 7.8 downtilt, trying to cover a 5 mile >>>>> radius. >>>>> Radios, are Ubiquity 400mw radio's, I've turned down to 23/200mw. >>>>> CPE's, are Ubiquity PS2, same radio at 400mw, Horizontal antenna at 18 >>>>> >>>>> >>>>> dbi. >>>>> >>>>> RSSI at the CPE is great, RSSI at the AP is poor often different by >>>>> 16-20 db. >>>>> >>>>> I also mentioned the RFLinx Qwave lightning arrestors, this is the >>>>> first tower we've used them on. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> >>>>> >>>>> I don't think that this would be an antenna location issue. >>>>> >>>>> What antennas did you use and where are they pointed? >>>>> >>>>> Also, what output are the radios? If you use 600mw radios on the ap >>>>> side and 100 mw radios on the rx side it'll make a difference. >>>>> >>>>> Also, having LOW power at the tx is almost always a good idea, >>>>> especially when colocated like this. I usually only run 15 to 17dB >>>>> at >>>>> >>>>> >>>>> >>>>> >>>>> the ap's. Most of my sectors are 13dB. Yeah, I have customers at >>>>> >>>>> >>>>> >>> 18 >>> >>> >>> >>>>> miles with multi meg RELIABLE service this way. There are other >>>>> customers at much shorter ranges that don't get reliable service, but >>>>> >>>>> >>>>> that's caused by other issues :-). >>>>> >>>>> >>>>> We run most of our cpe at pretty high power these days due to the >>>>> need >>>>> >>>>> >>>>> >>>>> >>>>> to blow through the overpowered competition or just over all noise >>>>> >>>>> >>>>> levels. >>>>> >>>>> >>>>> Anyway, what gain are the antennas and where are they pointed? How >>>>> much downtilt etc. >>>>> >>>>> How far are the customers from the tower? >>>>> >>>>> What polarity are the antennas? All the same, or did you mix it up? >>>>> >>>>> What are the cpe radios? What power, what antennas etc. >>>>> >>>>> If you had a 15 db transmit antenna and a 15 db transmit radio >>>>> shooting to a >>>>> 15 dB panel at 5 miles you should see an rssi of, -83 or so. Legally >>>>> >>>>> >>>>> you could have 6 more dB at the AP side giving you around -77 at the >>>>> cpe 5 miles out. >>>>> >>>>> Hope this helps! >>>>> marlon >>>>> >>>>> ----- Original Message ----- >>>>> From: <m...@tc3net.com> >>>>> To: <wireless@wispa.org> >>>>> Sent: Saturday, June 13, 2009 1:09 PM >>>>> Subject: [WISPA] Radio Seperation >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> We've just installed a 3 sector 2.4 setup, at 145' with maxrad >>>>> >>>>> 120's. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> I'm noticing the receive sensitivity on the AP's are about 15-20 >>>>> db's >>>>> >>>>> >>>>> >>>>> >>>>> different then what I see on the CPE's, tried a Tranzeo/Ubiquity >>>>> >>>>> >>>>> radio. >>>>> >>>>> >>>>> I'm using Ubiquity AP's, and they work fine on another 3 sector >>>>> setup >>>>> >>>>> >>>>> >>>>> >>>>> I have, however this tower is an A-Frame. The tower owner won't >>>>> allow >>>>> >>>>> >>>>> >>>>> >>>>> outside climbers so his guy did it, and he put one on each leg at >>>>> >>>>> >>>>> 145' >>>>> >>>>> >>>>> back to back. If the radios were too close together even on >>>>> different >>>>> >>>>> >>>>> >>>>> >>>>> channels, would the RX performance on the AP exhibit this behavior? >>>>> Only other change on this tower was RFLinx Quarter-wave arrestors in >>>>> >>>>> >>>>> line. >>>>> >>>>> >>>>> If I'm 3-5 miles away I can see on the CPE a RSSI of -65 to -75 for >>>>> example, on the AP the reading would be in the -90 to not even below >>>>> >>>>> >>>>> the noise floor. >>>>> >>>>> Any thoughts would be appreciated as always. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> >>>>> -------------------------------------------------------------------- >>>>> - >>>>> ----------- >>>>> WISPA Wants You! 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