>> I’ve got an AF24 that will drop at 2.5 miles for about an hour a year. I’ve >> got a 39GHz link at 2 miles that seems pretty solid also
This is exactly the type of anecdotal observations that I made reference to earlier :) Regards. Faisal Imtiaz Snappy Internet & Telecom http://www.snappytelecom.net Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > From: "Rory Conaway" <r...@triadwireless.net> > To: af@afmug.com > Sent: Saturday, January 20, 2018 2:02:53 PM > Subject: Re: [AFMUG] Quick comparison between 80GHz and AF24 > I’m in Southern Arizona so heavy rain is pretty brief but also why I’m asking > the question. I’ve got an AF24 that will drop at 2.5 miles for about an hour a > year. I’ve got a 39GHz link at 2 miles that seems pretty solid also but I’m > open to using that at 3.5 if that has a better chance too. > Rory > From: Af [mailto:af-boun...@afmug.com] On Behalf Of Mike Hammett > Sent: Saturday, January 20, 2018 11:07 AM > To: af@afmug.com > Subject: Re: [AFMUG] Quick comparison between 80GHz and AF24 > Trango's initial 24 GHz radio could do that. > ----- > Mike Hammett > Intelligent Computing Solutions > Midwest Internet Exchange > The Brothers WISP > From: "Mathew Howard" < mhoward...@gmail.com > > To: "af" < af@afmug.com > > Sent: Saturday, January 20, 2018 12:04:15 PM > Subject: Re: [AFMUG] Quick comparison between 80GHz and AF24 > This is the first I've heard of adaptive channel sizes... I've been looking at > both Siklu and Bridgewater, and nobody from either company ever mentioned that > (that doesn't necessarily mean they can't do it though). > On Jan 20, 2018 11:58 AM, "Mike Hammett" < af...@ics-il.net > wrote: > Adaptive channel sizes? > ----- > Mike Hammett > Intelligent Computing Solutions > Midwest Internet Exchange > The Brothers WISP > From: "Eric Kuhnke" < eric.kuh...@gmail.com > > To: af@afmug.com > Sent: Saturday, January 20, 2018 11:48:24 AM > Subject: Re: [AFMUG] Quick comparison between 80GHz and AF24 > This is not extremely new in 80 GHz, just with different and denser > modulations. > The Siklu 80 GHz stuff has done adaptive coding and modulation for a while. > The > (now 7 year old!) Bridgewave adaptrate 80 GHz stuff would maintain a 100 Mbps > link during a rain fade, by switching a nominally QPSK-modulated 1500 MHz wide > channel for 1 Gbps, temporarily down to BPSK during a rain fade event. > On Sat, Jan 20, 2018 at 9:45 AM, Stefan Englhardt < s...@genias.net > wrote: >> Some vendors do some new things to stretch the range of 80GHz: >> http://de.nec.com/de_DE/global/prod/nw/pasolink/products/ipasolinkEX_advanced.html >> ? >> They modulate down and then reduce channel size. >> This gear is in the 20kEuro Range … >> Von: Af [mailto: af-boun...@afmug.com ] Im Auftrag von Faisal Imtiaz >> Gesendet: Samstag, 20. Januar 2018 17:08 >> An: af@afmug.com >> Betreff: Re: [AFMUG] Quick comparison between 80GHz and AF24 >> We have two things to contend with... >> one is Oxygen Absorption >> second is Rain Fade >> Science says, 24ghz has much less O2 absorption fade vs 80ghz >> Science also says that 24ghz has slightly less Rain fade vs 80ghz >> Science also says that if on a particular link, if one is comparing 24ghz vs >> 80ghz, the difference in which link drops first will be based on the TX >> power / >> Antenna Gain and Rx sensitivity. >> If all things were exactly the same, then 80ghz would drop before 24ghz in >> Rain >> event. >> But in reality, all things are not the same.. I believe 80ghz one is allowed >> more power, and higher antenna gain. >> https://www.e-band.com/index.php?id=86 >> https://www.linkedin.com/pulse/dont-fall-siklu-overbuilds-distance-claims-david-theodore >> at 3.5miles, one is pushing the limits of both 24gzh as well as 80ghz.. >> Depending on what you are trying to achieve, and the rainzone, you can make >> your choice based on what will perform better normally... cause both of them >> will go out in rain :) >> Best of Luck >> Faisal Imtiaz >> Snappy Internet & Telecom >> http://www.snappytelecom.net >> Tel: 305 663 5518 x 232 >> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net >>> From: "Mathew Howard" < mhoward...@gmail.com > >>> To: "af" < af@afmug.com > >>> Sent: Friday, January 19, 2018 8:42:31 PM >>> Subject: Re: [AFMUG] Quick comparison between 80GHz and AF24 >>> I'd guess 24ghz would be slightly better, but either one is going to drop at >>> that distance if you ever get heavy rain. >>> Somebody from Siklu told me at one time, that some of their customers have >>> told >>> then that their rainfade is slightly better than an AF24, but slightly worse >>> than an AF24HD... how accurate that is, I don't know. >>> On Jan 19, 2018 6:03 PM, "Rory Conaway" < r...@triadwireless.net > wrote: >>>> I haven’t run the numbers so please save me some time. Which one has less >>>> fade >>>> margin at 3.5 miles? I was going to use Siklu with a 2’ antenna. >>>> Rory Conaway • Triad Wireless • CEO >>>> 4226 S. 37 th Street • Phoenix • AZ 85040 >>>> 602-426-0542 >>>> r...@triadwireless.net >>>> www.triadwireless.net >>>> “"Engineers believe that if it ain't broke, it doesn't have enough features >>>> yet." — Scott Adams
