I agree about the interference. I found the spectrum had to be clean or even at less than 3 miles we had a hard time getting much throughput. Casey at AirLink has a 15mile link doing 250Mb one way.
On Tue, Oct 21, 2014 at 4:20 PM, Kees H <[email protected]> wrote: > It is EIRP. and the drop in throughput is interference. > > > ----- Original Message ----- > *From:* Josh Luthman <[email protected]> > *To:* Ubiquiti Users Group <[email protected]> > *Sent:* Tuesday, October 21, 2014 2:03 PM > *Subject:* Re: [Ubnt_users] AirFiber5 Issues > > Good catch. The 30db tx power is probably EIRP, not tx power (weird label > IMO). > > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > On Tue, Oct 21, 2014 at 4:56 PM, G. Nicholas <[email protected]> wrote: > >> Stephen, >> >> When you used the UB Link Calc you told it your TDD Freq was 5800 which >> is 47db EIRP. From the screen shots you are really using DFS freqs which >> are limited to 30db EIRP. In my opinion a 7.7 mile shot with an Airfiber 5 >> will give you the performance that you are seeing because you do not have >> the SNR to do the higher QAM modulations. >> >> >> Garth >> >> ----- Original Message ----- >> From: Stephen Parac >> Sent: 10/21/2014 3:25:12 PM >> To: [email protected] >> Subject: [Ubnt_users] AirFiber5 Issues >> >> > I'm having some issues with my first AirFiber5 link. I've successfully >> > installed an AirFiber24 link. I've used the link calculator and the >> > anticipated signal is -66 on both sides. >> > >> > Background: There are zero obstacles in the way of the link. One is >> > installed on the edge of a cliff, the other on the outermost edge of a >> > water tower 140' in the air. I've also confirmed there is little to no >> > noise operating on both frequencies. We've also verified the mounts are >> > perfectly level and plumb. We've also spent a significant amount of time >> > peaking the antennas and are 95% confident (we're going back out at the >> > end of this week) that the screenshots are as good as they are going to >> > get. I've also "bench" tested them and was able to adjust the output >> > power setting to get the desired RSSI, where I got the desired >> throughput. >> > >> > Given all of that, does anyone have any suggestion? I can't imagine the >> > issue is anything but for alignment, but we've spent a lot of time on >> > alignment and its hard to believe that's still the issue given how much >> > time we've spent out there. I've installed licensed links before and we >> > have a ton of experience, we know about side lobes and how to properly >> > peak equipment. >> > >> > On a side note, its hard to keep the link status as "operational" and >> > the remote sides of both links frequently drop and come immediately >> > back. I also can't seem to get the output power to match what I have it >> > manually set to. Finally, I have slowed the modulation rate down to try >> > and assist with peaking. >> > >> > Any advice is appreciated. >> > -- >> > >> >> _______________________________________________ >> Ubnt_users mailing list >> [email protected] >> http://lists.wispa.org/mailman/listinfo/ubnt_users >> > > ------------------------------ > > _______________________________________________ > Ubnt_users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/ubnt_users > > > _______________________________________________ > Ubnt_users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/ubnt_users > > -- Adair Winter VP, Network Operations / Owner Amarillo Wireless | 806.316.5071 C: 806.231.7180 http://www.amarillowireless.net
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