after looking at another tower i think i can go with the 3 foot dishes now. that puts me at -57 and tower coverage is supposed to be factoring in a little bit of tree fade so even if i fade 10db more im still at -67 which should be enough i would think.
On Thu, Dec 6, 2018 at 4:12 PM Mathew Howard <[email protected]> wrote: > So, to achieve 150Mbps each way, you would need 300Mbps aggregate with an > AF5xHD, which means that you're going to need a minimum of a 40mhz channel > at 8X (256QAM). to get 8X, you can use a maximum of 22dbm TX power, which > by my calculations, would give you a signal of roughly -58 with 2' dishes - > an AF5xHD is supposed to be able to do 8x at -65 on a 40mhz channel, so > assuming no noise and clear LOS, that'd work just fine and give you a few > db to spare. Realistically, you probably aren't going to get 8X on that > link, so you'd need to bump it up to a 50mhz channel and hope 6X works. > That lets you bump the TX power up a couple more db, and now you only need > a -69 to get the desired capacity, which starts to look a lot more > promising... but those trees could easily cost you more than 10db, and we > don't know what kind of noise you're going to be dealing with. Going to 3' > dishes on both ends should gain you 8db, but if you can't use 3' dishes, > that doesn't really matter. My guess is that those trees are going to be > cutting the signal down more than what 3' dishes would gain, but I don't > believe that trees in towercoverage are accurate enough to really try to > predict that. > > Of course if you don't mind burning up the entire 5.8ghz band, you could > use an 80mhz (or even 100mhz) channel, and then you'd only need 4X to get > that kind of bandwidth, which would let you go up to 29dbm TX power, and > you'd only need a signal of -71, which would mean you could afford to lose > around 20db to the trees... > > On Thu, Dec 6, 2018 at 2:40 PM Adam Moffett <[email protected]> wrote: > >> I got over 300mbps at 16.7 miles with 3' dishes on the AF5XHD. >> The catch is you need a large channel for these high data rates and you >> have to have a solid SNR across the whole channel. That's no guarantee. >> >> I don't think those intermittent trees in the bottom half of the Freznel >> zone are as big of a problem as people are making out. The bigger problem >> I see is the 2' dishes. I would not bet the farm on getting 150mbps out of >> it. >> >> -Adam >> >> >> On 12/6/2018 2:48 PM, Kurt Fankhauser wrote: >> >> Josh, who did you do that link for? >> >> On Thu, Dec 6, 2018 at 2:38 PM Josh Luthman <[email protected]> >> wrote: >> >>> Not just no but hell no. 150 megs isn't going to happen. I wouldn't >>> even count on it associating. >>> >>> I did a 15 mile shot and I was a lot higher on both sides maybe half an >>> hour from where you're at. >>> >>> Josh Luthman >>> Office: 937-552-2340 >>> Direct: 937-552-2343 >>> 1100 Wayne St >>> Suite 1337 >>> Troy, OH 45373 >>> >>> >>> On Thu, Dec 6, 2018 at 2:20 PM Kurt Fankhauser <[email protected]> >>> wrote: >>> >>>> found another site with better looking profile, 100 foot higher >>>> elevation on one of the ends. (see attached) >>>> >>>> On Thu, Dec 6, 2018 at 2:04 PM Mathew Howard <[email protected]> >>>> wrote: >>>> >>>>> ubnt doesn't make a product that's going to work good for that >>>>> situation... The only thing that might work better than AF5XHD for that is >>>>> going to be AF-2X, or maybe AF-3X, but the chances of getting 150mbps out >>>>> of either of those is pretty slim. >>>>> >>>>> Now, as far as if AF5XHD's with 2' dishes will work... who knows, it >>>>> depends on how much the trees actually block it, which probably isn't >>>>> really possible to accurately predict. You're pretty much going to have to >>>>> try it to know what it will do, but personally, I wouldn't do it unless I >>>>> really had to. >>>>> >>>>> On Thu, Dec 6, 2018 at 12:45 PM Timothy Steele < >>>>> [email protected]> wrote: >>>>> >>>>>> everything about that email just wants to make me ask why-why oh >>>>>> why.. >>>>>> >>>>>> >>>>>> I would use https://link.ubnt.com/ to find the product that would >>>>>> work best >>>>>> >>>>>> On Thu, Dec 6, 2018 at 1:31 PM Kurt Fankhauser < >>>>>> [email protected]> wrote: >>>>>> >>>>>>> Trying to do a NLOS shot with AF5XHD's thats 25 miles (see attached >>>>>>> topo). Only have done 10-12 mile shots before that are NLOS. I have had >>>>>>> good success doing the 10 mile shots skimming tree tops but not sure if >>>>>>> the >>>>>>> added distance is going to drastically change that. According to >>>>>>> TowerCoverage this link is showing it will work. Can't use 3 foot dishes >>>>>>> due to wind loading only able to use 2 footers. Anyone think this should >>>>>>> work? Only need about 150mbps each way. >>>>>>> -- >>>>>>> AF mailing list >>>>>>> [email protected] >>>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>>> >>>>>> -- >>>>>> AF mailing list >>>>>> [email protected] >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>> >>>>> -- >>>>> AF mailing list >>>>> [email protected] >>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>> >>>> -- >>>> AF mailing list >>>> [email protected] >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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