I have been using this meter, http://www.streakwave.com/Itemdesc.asp?ic=PM%2D2458&eq=&Tp=
It checks forward power, reflected power, and will give you the SWR reading. Its been a lifesaver. 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: Thursday, June 18, 2009 10:53 AM To: WISPA General List Subject: Re: [WISPA] Radio Seperation Kurt, We are testing some of this at a different tower, where one of the AP's has flaked out, and we can climb it. We didn't test all the radios/pigtails/coax or lightning arrestor before deploying, good idea though, will do so in the future, what kind of meter do we need to test these? Is that SWR or VSWR, I have a SWR meter, wasn't sure that would do for this stuff. I know the spectrum analyzer at the base isn't the same, but it was all I could do on this tower, since I can't climb it with my own people. We got the 2-foot N-N LMR-400 jumpers from L-com, the seem well made, and a nice fit. Regards Michael Baird > You can't check with a spectrum anylyzer at the base! You have to climp the > tower and plug each antenna in to the spectrum anyalyzer. > > Also there is no "black magic" involved. Wireless can all be explained with > laws of physics. There are too many wireless providers out there that just > "plug and pray." Most of them just get lucky and the stuff "just works." > They can't even explain why it works. > > You need to go down this list and check everything: > > 1. Test all radio's, pigtails, coax with a power meter. > 2. Check SWR on all the antennas. > 3. If you have a spectrum analyzer, consider yourself lucky and check each > sector at the antenna port. > 4. Who made the coax jumpers? Make sure center pin is flat against edge of > connector. I've seen N connectors not work at 2.4ghz but work at 5.8ghz due > to this. > > 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: Thursday, June 18, 2009 10:22 AM > To: WISPA General List > Subject: Re: [WISPA] Radio Seperation > > At the base, I see no signals except from my radios, with the spectrum > analyzer. > > I've still not been able to get the guy to climb the tower, in other > forum's I've found people with horizontal antennas, having a problem on > RX at the AP only with too much downtilt. Near the tower there are a few > apartment complexes and hotels that are in the focus of the main beam at > that downtilt. When I get the guy up on the tower, I am going to try > uptilting it first for sure, maybe with that tilt they are picking up > more noise then they should be. > > Regards > Michael Baird > >> It sure seems like interference since it's on all three APs, even when >> you turn off the other two. One bad radio is possible but not three. >> >> Could there be some others source of interference near but not on the >> tower? >> >> Greg >> On Jun 16, 2009, at 10:13 AM, Michael Baird wrote: >> >> >> >>> The only other things on the tower according to the owner, is at >>> 150mhz >>> and 450 mhz. >>> >>> Regards >>> Michael Baird >>> >>> >>>> Could there be any other source of interference? What else is on the >>>> tower? >>>> >>>> Greg >>>> >>>> On Jun 16, 2009, at 8:37 AM, Michael Baird wrote: >>>> >>>> >>>> >>>> >>>>> I actually shut the radio's off on the two opposite sectors and >>>>> didn't >>>>> see improvement, tried that with all three sectors, they all read >>>>> about >>>>> the same. >>>>> >>>>> From the suggestions here and elsewhere, I'm going to do the >>>>> following >>>>> one at a time. >>>>> >>>>> 1). Spectrum analyze with all the radios off. >>>>> >>>>> 2). Adjust the downtilt first, I have a client setup, I'll adjust >>>>> the >>>>> downtilt on their sector from 7.8 to 4 degrees and see what happens, >>>>> if >>>>> that helps I'll go to 0.3 and look at the settings, which will align >>>>> the >>>>> main beam to 5 miles out, and try to catch everybody underneath, I >>>>> have >>>>> seen confirmation that downtilt can affect just the AP side. >>>>> >>>>> 3). Remove the LP and see if that makes any difference, our inhouse >>>>> testing doesn't show any impact though. >>>>> >>>>> 4). Separate the radios by 10 feet vertically, I will do this >>>>> anyway, >>>>> although turning off the other sectors should have taken this out of >>>>> the >>>>> equation, unless the other two sectors are reflecting on each other >>>>> badly, because of their close proximity. >>>>> >>>>> 5). Change out a radio, and see if somehow all of my radio's got >>>>> fried. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> >>>>> >>>>>> Michael >>>>>> >>>>>> If you can reduce the TX power on 2 of the sectors and see if the >>>>>> third has RSL improvement >>>>>> >>>>>> Bob >>>>>> Sent from my Verizon Wireless BlackBerry >>>>>> >>>>>> -----Original Message----- >>>>>> From: Blair Davis <the...@wmwisp.net> >>>>>> >>>>>> Date: Mon, 15 Jun 2009 22:44:52 >>>>>> To: WISPA General List<wireless@wispa.org> >>>>>> Subject: Re: [WISPA] Radio Seperation >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> > ---------------------------------------------------------------------------- > ---- > >>>>>> WISPA Wants You! 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