It is EIRP. and the drop in throughput is interference. ----- Original Message ----- From: Josh Luthman To: Ubiquiti Users Group 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
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