I'm kind of curious why one wouldn't just go with 11ghz or 18ghz on this link? The only reason that I'd consider using 80ghz on a link like that would be if I needed lots of capacity... but if an AF24 is an option, I'm assuming it doesn't need to be all that high of capacity, and if 80ghz is an option, cost also isn't that big of a factor. Unless it's a case where you can't wait for licensing, or there aren't 11ghz channels available, why not just go licensed?
On Sat, Jan 20, 2018 at 10:07 AM, Faisal Imtiaz <[email protected]> wrote: > 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 <(305)%20663-5518> > > Help-desk: (305)663-5518 <(305)%20663-5518> 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 >> <https://maps.google.com/?q=4226+S.+37&entry=gmail&source=g>th Street • >> Phoenix • AZ 85040* >> >> *602-426-0542 <(602)%20426-0542>* >> >> *[email protected] <[email protected]>* >> >> *www.triadwireless.net <http://www.triadwireless.net/>* >> >> >> >> “"Engineers believe that if it ain't broke, it doesn't have enough >> features yet." — Scott Adams >> >> >> > >
