Don't forget default (and currently ONLY) channel width of 100 Mhz =( Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373
On Tue, Mar 27, 2012 at 1:13 PM, Brian Webster <bwebs...@wirelessmapping.com> wrote: > The good thing about this band is that free space loss is your best friend > with regards to interference. Any use in this band to get an appreciable > amount of signal requires very narrow beamwidth antennas to keep the power > levels up to a point to overcome the attenuation through space. Couple those > tighter patterns with the fact that the signal falls off very rapidly in > free space and you have a greatly reduced opportunity for interference. I do > agree with you on the channel width that many people will waste capacity > only because they can..... > > Thank You, > Brian Webster > www.wirelessmapping.com > www.Broadband-Mapping.com > > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Tom DeReggi > Sent: Tuesday, March 27, 2012 12:06 PM > To: WISPA General List > Subject: Re: [WISPA] UBNT AirFiber Radio Pics > > Any way you look at it, the UBNT 24Ghz product is a game changer. Its > bringing a price point, that will mass excellerate the adoption of 24Ghz > use. > At that price, there are 1000s of uses. Its very exciting. Its also a big > bonus that it is MIMO, which should give it a good link budget, compared to > the methods other technologies use to accommodate dual pol. > > What I dont like about it is that it uses to much spectrum and is to fast, > which will cause parties to deploy faster speeds than they need, simply > because they can, and cause more interference in urban areas, and reduce the > number of links in an area. Often people incorrectly think that millimeter > is like inteference free. What they forget is the low range is based on Rain > fade, but when its not raining the signal goes very far, and reflections can > reflect all over the place, even though narrow beamwidth. > > But there will still be a strong market for other products like SAF. For > example, windloading and mounting. I jsut bought a SAF radio for that > reason, where the 1ft dish option was preferred. > SAF also has 256QAM support, quite a bit more efficient than UBNT's 64QAM > limit, allowing high speed in smaller channels, allowing more radios to be > colocated at a single site. > > I think UBNT's marketing is their typical overstated marketing.. Just like > AIRMAX 5.8 where they promote as 300mb, when in reallity Dual Pol 20Mhz > channels, the common size that can be used, yields more like between 40mb > and 80mb depending on link budget and noise floor. So in doing apples to > apples comparisons, its important to take that into consideration. For > example, a 13mile link just isn't going to happen in my rain zone, but might > be doable in the desert. With 2ft dishes, I dare not go over 2-1/4 miles, > and still prefer under 1.5m. > > I believe the UBNT 24 product will also put a hurting on the 60Ghz market. > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless _______________________________________________ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
