That's assuming you're using 2.4 and 20mhz channels. I feel it is only wise to use 10 or even 5 mhz channels.
You drop those laptops that can see the AP and think they can get service. You cut interference in half and focus the power in half the bandwidth (bit more coverage!). You can only use things that can use the smaller channels. On 6/30/09, RickG <[email protected]> wrote: > 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<[email protected]> > 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: [email protected] [mailto:[email protected]] 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" <[email protected]> >>>> To: "WISPA General List" <[email protected]> >>>> 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: [email protected] [mailto:[email protected]] >>>>>> 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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