After my last comment on this about the omni, I'm hesitant to give out advise but here it goes anyway: My worst operating tower is quad-sectored. With 2.4GHz it's best to stick with tri-sectors since you only have 3 non-over channels. Just my two cents worth... -RickG
On Tue, Jun 30, 2009 at 2:46 PM, Robert West<robert.w...@just-micro.com> wrote: > I decided to just upgrade the whole thing and install sector antennas. > It'll eventually go that way anyhow. This spot is the farthest out we reach > but last week, out of nowhere, the calls started to come in from that area > asking about service so I guess a real upgrade is in order. I have a set of > 2.4 sector antennas that have been sitting around unused so I guess that can > be the home for them. The 5.8 however, any suggestions on that for sector? > Again, going into the 600a routerboard, R5H cards. > > My 2.4ghz sector antennas are 90 degree, so we'll be using 4. If we use 1 > card for each sector on the 2.4, then go with 3 antennas for the 5.8 and use > our Ubiquiti XR5 for the backhaul, that's going to fill up all 8 slots on > the 600a. Never been to that point before, will our 48v POE run this whole > thing or should I just add another routerboard for the 5.8 and the backhaul? > My head is telling me to just add the board but the wallet is running away > from me............ > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Curtis Maurand > Sent: Tuesday, June 30, 2009 11:14 AM > To: WISPA General List > Subject: Re: [WISPA] Antenna Performance > > > > http://www.radiolabs.com/products/antennas/2.4gig/2.4-aluminum-parabolic.php > > > > If you've got to go 10 miles, then you need gain. > From the website. > > *2.4 GHz 24db Directional Parabolic Grid WiFi Antenna* > > *The Directional High Gain WiFi Parabolic Grid* WiFi Antenna offers > 24dBi gain at the connector and a tight 8 Degree beamwidth. The high > gain wifi antenna is an aluminum die cast which is then powder coat > painted for added environmental protection. Because of its grid design > the antenna offers excellent wind loading characteristics. > > > > Michael Baird wrote: >> Marlon, >> >> Not sure what you are saying here. According to the vendors specificatons. >> >> Teletronics 15-124 - 19DB horizontal w/8 degree vertical beamwidth. >> Tranzeo TR-24H-120-16 - 16DB horizontal w/6 degree vertical beamwidth. >> >> Yes it is odd that the Teletronics claims a higher VB, but then again >> it, it cost a lot more and should be a better antenna, as I believe gain >> not only comes with narrowing coverage (sector width), but antenna design. >> >> Regards >> Michael Baird >> >>> Gain only comes from narrowing coverage with antennas. >>> >>> If there are both 120* antennas you can't have HIGHER gain with GREATER >>> coverage.... It takes half the coverage area go give you twice the power > >>> (3DB of gain). >>> >>> > http://www.odessaoffice.com/wireless/antenna/how_to_pick_the_right_antenna.h > tm >>> >>> laters, >>> marlon >>> >>> ----- Original Message ----- >>> From: "Michael Baird" <m...@tc3net.com> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Sunday, June 28, 2009 2:32 PM >>> Subject: Re: [WISPA] Antenna Performance >>> >>> >>> >>> >>>> Not ,the same downtilt angle, same percentage as the old one. The >>>> previous antenna was a Tranzeo 16db w/6 degree vertical, the Teletronics >>>> 19db has a 8 degree vertical actually larger VB then the 16db at 6. They >>>> are both at .3 degrees downtilt. The only reason I mention the VSWR is >>>> because the teletronics VSWR is 1.1:4, vs 1.5 on the Tranzeo. The >>>> Teletronics is down about 6db on the CPE side for all the clients on the >>>> test sector, on the AP side it's the same. I tested multiple tilt's as >>>> well, between 0-1 degree was the best on the CPE side. >>>> >>>> Regards >>>> Michael Baird >>>> >>>> >>>>> First thing that comes to my mind reading your post is that you > installed >>>>> a >>>>> higher gain antenna which means your vertical beam is going to be >>>>> narrower >>>>> (sometimes higher gain is not always better). Being that you installed >>>>> the >>>>> antenna with the same down tilt angle your missing the mark because you > >>>>> have >>>>> a narrower vertical beam. >>>>> >>>>> As for the VSWR nothing really considered too low. If your VSWR is > higher >>>>> then 1.5:1 then you have a problem for sure. >>>>> >>>>> Personally never used or tested TT's 15-124 antenna but have sold a few > >>>>> of >>>>> them with no complaints on it as far as I know. >>>>> >>>>> -----Original Message----- >>>>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >>>>> Behalf Of Michael Baird >>>>> Sent: Sunday, June 28, 2009 8:33 AM >>>>> To: WISPA General List >>>>> Subject: [WISPA] Antenna Performance >>>>> >>>>> I picked up a Teletronics 15-124 19db horizontal antenna for testing > and >>>>> deployed it in place of a Tranzeo 16db Horizontal (TilTek?), using same >>>>> pigtail and radio. With the clients on this sector, the AP side is the >>>>> same, but the CPE receive side seems to have suffered with this larger >>>>> antenna. Nothing was changed other then the antenna, aimed to the exact >>>>> same degree, tilted the same percentage of vertical tilt, and so forth. >>>>> I'm thinking the antenna isn't very good, or it's VSWR is too low and >>>>> I'm getting some power reflected from the antenna. Anybody have >>>>> experience with this antenna, or these scenarios? >>>>> >>>>> I expected this bigger, more expensive antenna to gain all across the >>>>> board. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> >>>>> > ---------------------------------------------------------------------------- >>>>> ---- >>>>> WISPA Wants You! 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