One way you can get a false hit. Had a DFS radio attached to frame of a window. The link went in front of the window. Whenever the customer opened or closed the (sliding) window, the radio got a DFS hit.
From: James Craig via Ubnt_users Sent: Thursday, October 20, 2016 12:21 PM To: [email protected] Cc: Ubiquiti Users Group Subject: Re: [Ubnt_users] DFS on AC Hi Alex, You should have the option to limit the channel list under Wireless -> Control Frequency List. We are working on some features to help reduce false hits further and improve channel selection on a hit. On Thu, Oct 20, 2016 at 3:11 PM, alex phillips <[email protected]> wrote: To say its a Sham, may be a little harsh. OS8 does a better job at the issue however essentially if a PrismAC radio sees activity on the DFS channel you are on that is not part of its session list, it runs away and goes to another channel. I think its physically impossible for these class of radio systems to actually detect the difference between Radar and just Signal on that band. I have had these discussions with UBNT, as well as others who use other radio products and I think false detect is a common problem on all platforms, not just UBNT. The FAA really threw a fit about this issue and the FCC made this a very strict certification requirement and so this is all that can be done. Even AF5 has this issue. We are going to start running a script that checks the radio ever 10 mins and if the freq has changed its going to change it back. I guess if there is a war going on between dfs logic and our logic, this may not work. I also wonder if the channel list can be limited. I don't see it in the UI. Perhaps UBNT folks listening can lend a hand here. Alex Phillips CEO and General Manager RBNS.net HighSpeedLink.net WISPA.org Board of Directors (2011-2017) WISPA President (2015-2017) 540-908-3993 On Thu, Oct 20, 2016 at 2:37 PM, James Craig via Ubnt_users <[email protected]> wrote: Hi Guys, airMAX radios should only jump to another channel if a RADAR hit is detected. I would suggest running a Frequency list when operating in DFS bands. That being said, this is most like related to a bug fixed in airOS8beta16. Ethan / Matthew: Could you forward the Support Info file from an AP that has recently seen this? [email protected] On Thu, Oct 20, 2016 at 1:38 PM, Ethan E. Dee <[email protected]> wrote: On the rockets, you choose a DFS channely and it sticks, that is what I'm used to. Can't replicate that on the rocket ac's On 10/20/2016 1:35 PM, Jordan de Geus wrote: Isn't DFS supposed to channel hop? Have you tried blocking the higher noise frequencies to prevent the use of those specific channels? On Thu, Oct 20, 2016 at 10:33 AM, Matthew Brendle <[email protected]> wrote: I have a 5AC PRISM doing the same thing. I manually pick a DFS channel on the wireless tab and the radio will go to a non-DFS channel. Does not matter which DFS channel I pick, it will go to a non-DFS channel to operate. It will let me manually pick a non-DFS channel and it will stay on it. Not auto, no freq list... Matt B. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ethan E. Dee Sent: Thursday, October 20, 2016 1:31 PM To: Ubiquiti Users Group <[email protected]> Subject: Re: [Ubnt_users] DFS on AC No, not confusing them. Complaining about both. DFS channel selection has a mind of it's own. With or without a frequency list. And auto, does not pick the best channel, or anywhere close. On 10/20/2016 1:27 PM, Matt Hoppes wrote: > It sounds like you're confusing DFS and auto channel selection. Which is your question about? > >> On Oct 20, 2016, at 13:13, Ethan E. Dee <[email protected]> wrote: >> >> So DFS on the AC lites is basically a sham from what I can tell. >> >> I pick a dfs channel and the rocket picks it's own channel. Usually a >> channel with much higher noise/interference. >> >> I use the frequency list and it does me no good. >> >> In addition, I have lot's of frequencies that are in the -90's for >> noise and 'auto' picks channels in the -75 to -85. I don't understand >> the channel selection for these at all. >> >> Any thoughts? >> >> -- >> Ethan Dee >> Network Admin >> Globalvision >> 864 704 3600 >> [email protected] >> >> [email protected] >> 864 467 1333 >> >> >> >> -- >> This message has been scanned by E.F.A. Project and is believed to be clean. >> >> >> _______________________________________________ >> 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 -- Ethan Dee Network Admin Globalvision 864 704 3600 [email protected] [email protected] 864 467 1333 _______________________________________________ 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 -- Ethan Dee Network Admin Globalvision 864 704 3600 [email protected] [email protected] 864 467 1333 _______________________________________________ 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
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