The other thing that changing height can do is change the angle of reflected/refracted signals thus changing the amount of multi-path signal the receiver sees. On 4/10/2014 10:44 AM, Matt Hoppes wrote: > Interesting explanation. Thanks. > >> On Apr 10, 2014, at 10:14 AM, "Brian Webster" <[email protected]> >> 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:[email protected]] >> Sent: Thursday, April 10, 2014 9:07 AM >> To: [email protected]; 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:*[email protected] [mailto:[email protected]] >>> *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 <[email protected] >>> <mailto:[email protected]>> 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 >>> <[email protected] >>> <mailto:[email protected]>> 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" <[email protected] >>> <mailto:[email protected]>> 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 >>> [email protected] <mailto:[email protected]> >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> >>> _______________________________________________ >>> Wireless mailing list >>> [email protected] <mailto:[email protected]> >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> >>> >>> _______________________________________________ >>> Wireless mailing list >>> [email protected] <mailto:[email protected]> >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> >>> >>> _______________________________________________ >>> Wireless mailing list >>> [email protected] >>> http://lists.wispa.org/mailman/listinfo/wireless > _______________________________________________ > Wireless mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/wireless > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2014.0.4355 / Virus Database: 3882/7325 - Release Date: 04/10/14 > >
-- Scott Reed Owner NewWays Networking, LLC Wireless Networking Network Design, Installation and Administration Mikrotik Advanced Certified www.nwwnet.net (765) 855-1060 (765) 439-4253 Toll-free (855) 231-6239 _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
