Hi, The sensitivity of the DFS receiver increases as the antenna gain decreases. The lowest gain DFS is certified for is a 23 dBi antenna gain. Setting an antenna gain lower than 23 dBi may result in unwanted DFS detections.
As an observation, I will say I am a bit surprised at all of the folks talking about sub 23 dBi antennas. When we released the AF5/AF5U 10X full duplex radios, there was some discussion suggesting that was that our antenna gain was too low (23 dBi). Now that we have an external antenna radio, is surprises me how many people want to go lower when using a higher gain antenna (narrower beam) should physically "tune out" more external interference. Food for thought, Chuck OT: Just saw Ex Machina - 2 thumbs up! On Sat, Apr 18, 2015 at 11:04 PM, Jeremy <[email protected]> wrote: > I thought I recalled Chuck mentioning something like that at AF. I guess > I should have taken notes. > > On Sat, Apr 18, 2015 at 9:53 PM, Josh Luthman <[email protected] > > wrote: > >> I've got 3 DFS set... No problems. >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> On Apr 18, 2015 11:30 PM, "Jeremy" <[email protected]> wrote: >> >>> It was talked about that you absolutely need to set your antenna gain >>> exactly for DFS to work. I think they also mentioned that you couldn't use >>> DFS freqs for both polarities without getting detections. So I believe one >>> freq would have to be non-DFS and one DFS. Did I catch that correctly? >>> Anyone? Or was it just that both polarities couldn't be the same DFS freq? >>> >>> On Sat, Apr 18, 2015 at 8:59 PM, Josh Luthman < >>> [email protected]> wrote: >>> >>>> Definitely set it in the DFS band! >>>> >>>> Josh Luthman >>>> Office: 937-552-2340 >>>> Direct: 937-552-2343 >>>> 1100 Wayne St >>>> Suite 1337 >>>> Troy, OH 45373 >>>> On Apr 18, 2015 10:06 PM, "Kurt Fankhauser" <[email protected]> wrote: >>>> >>>>> Ken, >>>>> This is V/H polarity. Don't really see any need for slant on this >>>>> link. I'm limited for antenna options right now anyway. But these are >>>>> working great so I don't think I'm going to mess with them. >>>>> >>>>> Josh, >>>>> No I did not set antenna gain. >>>>> >>>>> >>>>> Kurt Fankhauser >>>>> >>>>> Wavelinc Communications >>>>> >>>>> P.O. Box 126 >>>>> >>>>> Bucyrus, OH 44820 >>>>> >>>>> http://www.wavelinc.com >>>>> >>>>> tel. 419-562-6405 >>>>> >>>>> fax. 419-617-0110 >>>>> >>>>> On Sat, Apr 18, 2015 at 9:52 PM, Josh Reynolds <[email protected]> >>>>> wrote: >>>>> >>>>>> There isn't really ATPC per say. There are some.. Similar options in >>>>>> 3.x firmware. Have you read Chuck's post on how the AF won't really let >>>>>> you >>>>>> "cheat" on EIRP? Has to do with distance calculations, tx power, etc. >>>>>> >>>>>> >>>>>> On April 18, 2015 5:05:43 PM AKDT, Josh Luthman < >>>>>> [email protected]> wrote: >>>>>>> >>>>>>> The EIRP is messed up unless the ATPC brought mine down to to -60. >>>>>>> I've got it at 25eirp with 19dbi antenna. >>>>>>> >>>>>>> Josh Luthman >>>>>>> Office: 937-552-2340 >>>>>>> Direct: 937-552-2343 >>>>>>> 1100 Wayne St >>>>>>> Suite 1337 >>>>>>> Troy, OH 45373 >>>>>>> On Apr 18, 2015 8:58 PM, "Mathew Howard" <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> looks to me like the antenna gain is at 0db, since it's saying it's >>>>>>>> limiting it to 15dbm EIRP... not that it actually makes any difference, >>>>>>>> since the TX power is going to be at 15dbm either way... it'll just be >>>>>>>> showing 38 on the interface. >>>>>>>> >>>>>>>> On Sat, Apr 18, 2015 at 7:54 PM, Josh Luthman < >>>>>>>> [email protected]> wrote: >>>>>>>> >>>>>>>>> Did you set 23dbi gain? >>>>>>>>> >>>>>>>>> Josh Luthman >>>>>>>>> Office: 937-552-2340 >>>>>>>>> Direct: 937-552-2343 >>>>>>>>> 1100 Wayne St >>>>>>>>> Suite 1337 >>>>>>>>> Troy, OH 45373 >>>>>>>>> On Apr 18, 2015 8:40 PM, "Kurt Fankhauser" <[email protected]> >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> First link up. Havn't even fine tuned anything yet. ARC panels on >>>>>>>>>> both ends. >>>>>>>>>> >>>>>>>>>> Initially tried to use DFS freqs and kept getting radar detect. >>>>>>>>>> Even though I was 50mhz away from anything else 5ghz on the same >>>>>>>>>> tower. >>>>>>>>>> Pretty sure the radar detection was coming from itself because it >>>>>>>>>> would >>>>>>>>>> pass the initial bootup listen period and once it started >>>>>>>>>> transmitting >>>>>>>>>> would then get the detections. So don't know what that was about. >>>>>>>>>> >>>>>>>>>> Kurt Fankhauser >>>>>>>>>> >>>>>>>>>> Wavelinc Communications >>>>>>>>>> >>>>>>>>>> P.O. Box 126 >>>>>>>>>> >>>>>>>>>> Bucyrus, OH 44820 >>>>>>>>>> >>>>>>>>>> http://www.wavelinc.com >>>>>>>>>> >>>>>>>>>> tel. 419-562-6405 >>>>>>>>>> >>>>>>>>>> fax. 419-617-0110 >>>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>> -- >>>>>> Sent from my Android device with K-9 Mail. Please excuse my brevity. >>>>>> >>>>> >>>>> >>> >
