Use LinkPlanner and manually punch in the trees. If you're shooting
through them, get higher or find another way.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Thu, Dec 6, 2018 at 9:34 PM Brian Webster <i...@wirelessmapping.com
<mailto:i...@wirelessmapping.com>> wrote:
With tower coverage and radio mobile, path calculations and
results are going to vary greatly by the amount of reliability you
have set in the configuration. What you use for spot mode for ptmp
is a lot different than if you want 99% or more uptime. Each
decimal place in radio mobile wants another 10 dB signal to meet
the reliability. This is a good tool to determine the path profile
but you really want to use some other path calc tool that is
designed for PTP links so that you get a reliable uptime
calculation result. The Longley Rice propagation model used for
Radio Mobile is not that good to reliability calculations in PTP
paths. It’s usually conservative unless you have your availability
numbers set too low say at 70 or 80%.
Long story short Kurt, find a path calc tool to run the signal
numbers now that you have established you have a path. As Adam has
said I would not be overly concerned with those trees in the path
as much as having the right tool to show your predicted signal. A
good path calc tool for PTPT gives you almost the exact numbers
for signal you should have for alignment. Radio Mobile and by
default tower coverage will not calculate the paths the same way.
Thank You,
Brian Webster
www.wirelessmapping.com <http://www.wirelessmapping.com>
www.Broadband-Mapping.com <http://www.Broadband-Mapping.com>
*From:*AF [mailto:af-boun...@af.afmug.com
<mailto:af-boun...@af.afmug.com>] *On Behalf Of *Kurt Fankhauser
*Sent:* Thursday, December 06, 2018 4:32 PM
*To:* af@af.afmug.com <mailto:af@af.afmug.com>
*Subject:* Re: [AFMUG] 25 mile shot AF5XHD NLOS ???
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 <mhoward...@gmail.com
<mailto:mhoward...@gmail.com>> 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
<dmmoff...@gmail.com <mailto:dmmoff...@gmail.com>> 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
<j...@imaginenetworksllc.com
<mailto:j...@imaginenetworksllc.com>> 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
<lists.wavel...@gmail.com
<mailto:lists.wavel...@gmail.com>> 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
<mhoward...@gmail.com
<mailto:mhoward...@gmail.com>> 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 <timothy.pct...@gmail.com
<mailto:timothy.pct...@gmail.com>> 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 <lists.wavel...@gmail.com
<mailto:lists.wavel...@gmail.com>> 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.
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