The efficiency is a dumpster fire. 256 QAM radios have about the same spectral efficiency.
----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Mathew Howard" <mhoward...@gmail.com> To: "AnimalFarm Microwave Users Group" <af@af.afmug.com> Sent: Thursday, January 9, 2020 12:23:41 PM Subject: Re: [AFMUG] Ubiquiti AF-11x licensed links Well, the efficiency isn't quite that bad. at 1024QAM (they actually do support 2048QAM now too) they can do somewhere around 350-375Mbps per polarity using a 56mhz channel, which is about the same as what our old SAF Lumina can do at 256QAM... of course if you figure that as an 80mhz channel, rather than 56mhz, it's pretty bad. I'm pretty sure that it doesn't meet the FCC efficiency requirements at the lowest modulations, but you'd have to have a pretty poorly engineered link for that to be a problem. On Thu, Jan 9, 2020 at 11:50 AM Ken Hohhof < af...@kwisp.com > wrote: If I remember right the biggest spectral efficiency problem with the AF-11x is that it uses both polarizations yet only gets the throughput of a single pol link. Could be difficult to license if you can’t get both polarizations. Good news, if you’re successful getting the license, you should be able to modify the license and upgrade to a true 1.3+ Gbps full duplex radio from SIAE, Aviat, Cambium, etc. Bad news, if you’re pushing the distance such that you can’t run 1024QAM or better most of the time, you may not meet the FCC minimum spectral efficiency requirement. From: AF < af-boun...@af.afmug.com > On Behalf Of Mathew Howard Sent: Thursday, January 9, 2020 11:28 AM To: AnimalFarm Microwave Users Group < af@af.afmug.com > Subject: Re: [AFMUG] Ubiquiti AF-11x licensed links Yeah, but the AF11 actually has to use an 80mhz emission designator, even though it's really only using 56mhz... so theoretically, if you upgrade the link to radios that can handle 80mhz, you shouldn't have any problems licensing it. On Thu, Jan 9, 2020 at 11:11 AM Daniel White < dwh...@atheral.com > wrote: <blockquote> You license an emission designatior... not a channel per se. When you license 56MHz of spectrum you use the 80MHz channel plan but there isn't 24MHz of unused spectrum sitting there... it gets used up pretty quickly for other paths, etc. So moral of the story... don't do that. photograph Daniel White Co-Founder & Managing Director of Operations phone: +1 (702) 470-2766 direct: +1 (702) 470-2770 3172 N Rainbow Blvd PMB 20394 Las Vegas, Nevada 89108 facebook iconyoutube iconlinkedin icon Seth Mattinen wrote on 1/8/20 09:54: <blockquote> On 1/8/20 8:36 AM, Kurt Fankhauser wrote: <blockquote> if you have an 80mhz channel and are running radios in 56mhz channel width can u just put a 2nd link up and split them up to the two 40mhz? No, that's not allowed. You need to license two 40MHz channels. </blockquote> -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com </blockquote> -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com </blockquote> -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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