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: [email protected] > From: "Mathew Howard" <[email protected]> > To: "af" <[email protected]> > 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" < [email protected] > 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 >> [email protected] >> www.triadwireless.net >> “"Engineers believe that if it ain't broke, it doesn't have enough features >> yet." — Scott Adams
