Yes, good way to look at it Brian, thanks. So, is there a minimum height per frequency... say for 900Mhz "you should never shoot less then x feet', like less then 6'?
On Thu, Apr 10, 2014 at 10:14 AM, Brian Webster < bwebs...@wirelessmapping.com> wrote: > Fresnel zones are 180 degrees out of phase with even and odd numbered zones > (1st, 2nd, 3rd and so on). When you design a path you strive for an exposed > Fresnel zone of between 1 and .6 of the first zone, meaning you use the > ground/trees/obstructions to block the second and higher numbered zones > (this is only partially blocking the zone at the bottom). This minimizes > the > cancelling effect giving an apparent gain. > > A good visual example of this is to take a Flashlight such as a Mag light > with an adjustable beam and shine it against the wall to see the circular > pattern. Carefully look at that pattern and you will see light and dark > rings, these are your Fresnel zones and the lighter ones are the odd > numbered zones. The idea is you keep the first bright zone and eliminate > the > rest. This is why going higher is not always better on a PTP path to get > more signal once you have cleared obstructions, going higher can expose > more > even numbered Fresnel zones with the phase cancelling and a reduction in > signal due to same. > > Thank You, > Brian Webster > www.wirelessmapping.com > www.Broadband-Mapping.com > > -----Original Message----- > From: Matt Hoppes [mailto:mhop...@indigowireless.com] > Sent: Thursday, April 10, 2014 9:07 AM > To: bwebs...@wirelessmapping.com; WISPA General List > Subject: Re: [WISPA] Who is using Towercoverage.com ? > > Can you explain this more? This isn't what I was getting at... but since > you brought it up and it's been brought up before it might be worth > explaining in more detail. I'm familiar with the concept but still can't > grasp why it works. > > > Matt Hoppes > Director of Information Technology > Indigo Wireless > +1 (570) 723-7312 > > On 4/10/14, 9:04 AM, Brian Webster wrote: > > Matt, > > > > Signals do change as you change height as you expose > > or conceal the even number Fresnel zones. > > > > > > > > Thank You, > > > > Brian Webster > > > > www.wirelessmapping.com <http://www.wirelessmapping.com> > > > > www.Broadband-Mapping.com > > > > > > > > *From:*wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] > > *On Behalf Of *Matt Hoppes > > *Sent:* Wednesday, April 09, 2014 3:24 PM > > *To:* WISPA General List > > *Subject:* Re: [WISPA] Who is using Towercoverage.com ? > > > > > > > > Signals don't change as you increment heights. You're asking for real > > time foliage mapping. Not going to find it. > > > > > > On Apr 9, 2014, at 3:18 PM, Josh Luthman <j...@imaginenetworksllc.com > > <mailto:j...@imaginenetworksllc.com>> wrote: > > > > I'm not talking about customers plotting where their address is. > > What I'm getting at is if I have a customer called in, I'd like to > > just punch in the location and then see if they'll work at ground > > level or how high we need to get off the ground and see the signal > > change as I increment height. > > > > > > > > Josh Luthman > > Office: 937-552-2340 > > Direct: 937-552-2343 > > 1100 Wayne St > > Suite 1337 > > Troy, OH 45373 > > > > > > > > On Wed, Apr 9, 2014 at 3:16 PM, Clay Stewart > > <cstew...@stewartcomputerservices.com > > <mailto:cstew...@stewartcomputerservices.com>> wrote: > > > > Josh. You can. Just put the web snip on a website. If need help can > > walk u through later today. Our websire customer lookup... > > http://www.towercoverage.com/iframemc.asp?mcid=1223&Acct=2910 > > > > On Apr 9, 2014 3:08 PM, "Josh Luthman" <j...@imaginenetworksllc.com > > <mailto:j...@imaginenetworksllc.com>> wrote: > > > > I'm having a hard time adjusting to this from Radio Mobile. > > There's all the same "stupid" interface shortfalls, for example > > wanting to know what a customer's CPE would be without adding a > > site and putting them in the same list. I feel with technology > > as it is, it shouldn't be so convoluted to simply put a dot on a > > map and see what the signal would be from a tower while being > > able to adjust the elevation on the fly. > > > > > > > > I'm wondering if there's another list/forum for this service, > > too. There's no way I'm going write a bible of questions for > > support, it doesn't make a whole lot of sense for either of us. > > > > > > Josh Luthman > > Office: 937-552-2340 <tel:937-552-2340> > > Direct: 937-552-2343 <tel:937-552-2343> > > 1100 Wayne St > > Suite 1337 > > Troy, OH 45373 > > > > > > > > _______________________________________________ > > Wireless mailing list > > Wireless@wispa.org <mailto:Wireless@wispa.org> > > http://lists.wispa.org/mailman/listinfo/wireless > > > > > > _______________________________________________ > > Wireless mailing list > > Wireless@wispa.org <mailto:Wireless@wispa.org> > > http://lists.wispa.org/mailman/listinfo/wireless > > > > > > > > _______________________________________________ > > Wireless mailing list > > Wireless@wispa.org <mailto:Wireless@wispa.org> > > http://lists.wispa.org/mailman/listinfo/wireless > > > > > > > > _______________________________________________ > > Wireless mailing list > > Wireless@wispa.org > > http://lists.wispa.org/mailman/listinfo/wireless > > > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > -- -- SCS Clay Stewart CEO, Tye River Farms, Inc., DBA Stewart Computer Services 434.263.6363 O 434.942.6510 C cstew...@stewartcomputerservices.com “We Keep You Up and Running” Wireless Broadband Programming Network Services
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