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.htm > > 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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