Hello,
LOL, I think the disclaimer as the bottom of the page cover this!
"DISCLAIMER: These results are provided with no guarantee or
warranty."
-----Original Message-----
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of 3-dB Networks
Sent: Wednesday, December 02, 2009 3:36 PM
To: 'WISPA General List'
Subject: Re: [WISPA] 20 mile link
I must have missed the day Ligowave announced 11GHz can go through mountains
:-)
Your calculator gives no indication of diffraction and multipath... which is
often larger issues with licensed gear than rain fading.
I'd also question you using the QPSK transmit power and receive sensitivity
as the default values when everyone is interested in the "320Mbps"
throughput, which is considerably less power and a much higher receive level
required.
Constructive criticism... this is one of the better manufacturer calculators
out there.
Daniel White
3-dB Networks
http://www.3dbnetworks.com
-----Original Message-----
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of Matt Hardy
Sent: Wednesday, December 02, 2009 2:17 PM
To: WISPA General List
Subject: Re: [WISPA] 20 mile link
It actually does take into account terrain data...
Let us know if you have any other questions or suggestions for improvement.
-Matt
On Wed, 2009-12-02 at 13:29 -0700, 3-dB Networks wrote:
> One thing I have noticed... it does not take into account multipath,
> or really anything else dealing with the terrain. The calculator is
> really a glorified free space loss calculator with a slick interface
> and the
terrain
> profile.
>
> It seems to function well... but you have to take into account terrain
> yourself :-)
>
> Daniel White
> 3-dB Networks
> http://www.3dbnetworks.com
>
>
> -----Original Message-----
> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
> On Behalf Of Robert West
> Sent: Wednesday, December 02, 2009 1:16 PM
> To: 'WISPA General List'
> Subject: Re: [WISPA] 20 mile link
>
> Hey, ya know I used that thing a few times a year or so ago but forgot
> all about it. Thanks for pointing me back to it! Any tips on using
> it for non-lingo equipment? Are the custom calculations fairly close
> to your
true
> results? Any significant fudge factor on it?
>
> Thanks!
>
>
> -----Original Message-----
> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
> On Behalf Of Michael Baird
> Sent: Wednesday, December 02, 2009 1:23 PM
> To: WISPA General List
> Subject: Re: [WISPA] 20 mile link
>
> Been using this one for quick lookups, requires an account to be
> established though.
>
> http://www.ligowave.com/linkcalc/main.html
>
> Regards
> Michael Baird
> > Yeah, I'd have to get quite a few more customers to pay for such a
thing.
> I
> > can certainly see the value in it but value versus food......
> > Uh.... I gotta eat.
> >
> > Someday, though. Someday..........
> >
> >
> >
> > -----Original Message-----
> > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
> > On Behalf Of RickG
> > Sent: Wednesday, December 02, 2009 12:42 PM
> > To: WISPA General List
> > Subject: Re: [WISPA] 20 mile link
> >
> > As they say, you get what you pay for. For normal stuff, especially
close
> > range, you can use a variety of software packages. But for a high
> > dollar tower, you want someone with the expertise and the software
> > to give you reliable results. -RickG
> >
> > On Tue, Dec 1, 2009 at 11:47 PM, Robert West
> > <robert.w...@just-micro.com>wrote:
> >
> >
> >> Me = Cheap
> >>
> >> RadioMobile = Free
> >>
> >> Wispmon = Yikes!
> >>
> >> It better be good but I think I'd need a few thousand customers
> >> before
I
> >> didn't feel that price.
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: wireless-boun...@wispa.org
> >> [mailto:wireless-boun...@wispa.org] On Behalf Of Brad Belton
> >> Sent: Tuesday, December 01, 2009 11:38 PM
> >> To: 'WISPA General List'
> >> Subject: Re: [WISPA] 20 mile link
> >>
> >> A relatively nifty new monitoring service out there also has a
> >> great
path
> >> profile tool built-in. The person that is developing the product
> >> is a
> >>
> > long
> >
> >> time wireless operator, so he has a very good feel for what our
industry
> >> needs.
> >>
> >> www.wispmon.com
> >>
> >> I've been a RadioMobile user for years now, but have found myself
> >> using
> >>
> > the
> >
> >> path profiler in wispmon more often than RadioMobile.
> >>
> >> Best,
> >>
> >>
> >> Brad
> >>
> >> -----Original Message-----
> >> From: wireless-boun...@wispa.org
> >> [mailto:wireless-boun...@wispa.org] On Behalf Of Brian Webster
> >> Sent: Tuesday, December 01, 2009 10:21 PM
> >> To: WISPA General List
> >> Subject: Re: [WISPA] 20 mile link
> >>
> >> $75 using 10 meter terrain data and 30 meter resolution tree clutter.
> >>
> >>
> >> Thank You,
> >> Brian Webster
> >> 214 Eggleston Hill Rd.
> >> Cooperstown, NY 13326
> >> www.wirelessmapping.com
> >> 607-643-4055 Voice
> >> 607-435-3988 Mobile
> >> 208-692-1898 Fax
> >>
> >>
> >> On Tue, Dec 1, 2009 at 10:59 PM, RickG <rgunder...@gmail.com> wrote:
> >>
> >>
> >>> THANKS to EVERYONE for their input. I'll let you know what I decide.
> >>> Another
> >>> question: Normally I do my path analysis with Delorme but I'm not
> >>>
> > feeling
> >
> >>> that is good enough considering the cost of the project and some
> >>> trees
I
> >>> see
> >>> in the distance. Is anyone out there offering path analysis for a
> >>> fair rate?
> >>> -RickG
> >>>
> >>> On Tue, Dec 1, 2009 at 9:36 AM, Mike <m...@aweiowa.com> wrote:
> >>>
> >>>
> >>>> Rick:
> >>>>
> >>>> You have been getting some good advice here. I am not a
> >>>> networking guru and have never played one on TV, but do know a
> >>>> thing or two
about
> >>>>
> >>> RF.
> >>>
> >>>> It seems with your physical layout you may have an opportunity
> >>>> for some space diversity. A simple link will probably serve you
> >>>> with 3 nines or so. If infrequent outages will sit OK with the
> >>>> user, then engineer a link with single radios.
> >>>>
> >>>> If you use some of the more inexpensive radio solutions as
> >>>> proffered here, you could put up two links with 20' to 30' of
> >>>> physical separation. Or, one dish on the water tower, and two on
> >>>> the new tower. The single one could be the AP and the other two
> >>>> remote ones stations. You could use an MT router running OSPF
> >>>> with one having a higher cost than the other. If one failed, the
> >>>> other would take
over.
> >>>>
> >>>> My fear of a 20 mile link would be those atmospheric events we
> >>>> sometimes see -- tropospheric ducting.
> >>>>
> >>>> I would be curious what you come up with.
> >>>>
> >>>> Mike
> >>>>
> >>>> At 09:22 PM 11/30/2009, you wrote:
> >>>>
> >>>>> Planning my first 20 mile PTP link. Path analysis shows clear.
> >>>>>
> >> Customer
> >>
> >>> is
> >>>
> >>>>> building a 100' tower just for this therefore the equipment I
> >>>>> choose
> >>>>>
> >>> must
> >>>
> >>>>> work. I'm free to use whatever I want. Suggestions?
> >>>>> -RickG
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>
>
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