Yes the front to back ratio is probably the most difference you will see in antenna patterns from manufacturer to manufacturer. Since they can't cheat the laws of physics and the power they get in the forward direction of a certain beam width antenna, they can spend the money on construction and design features to minimize the emissions for the rest of the pattern and that includes the signal off the back. You can build radio mobile antenna patterns with a spreadsheet located in the yahoo groups file section. It's not to hard to do.
Thank You, Brian Webster -----Original Message----- From: George Rogato [mailto:wi...@oregonfast.net] Sent: Sunday, March 08, 2009 8:01 PM To: bwebs...@wirelessmapping.com; WISPA General List Subject: Re: [WISPA] radio mobile My experience with antenna patterns has been that they are not accurate in all distances. It's either that or I don't understand them. To give you a couple examples. I have a 900MHz yagi, that has a miraculous connection @ 90* of the center 1 mile out. I was surprised that I even got a signal and to my amazement there it was. I've seen this close up with rootennas that I use to cover a small swath of an area for the extra power boost and to keep the noise level down outside of the intended coverage area. You get close and it's almost omni like. I have hot customers off the back side. I suppose that is the difference between a high quality antenna and cheap ones. And I bet when I get a few miles out the pattern is very accurate. Brian Webster wrote: > Brian, > Go to the Radio Mobile group on yahoo. There you can search the archives > and or files sections. The archives will explain how to make your own > antenna file if you can find a suitable one for your use. For example if you > are trying to create a 60 degree antenna pattern you could use a similar one > in the files section. The laws of physics dictate that the pattern won't be > that much different from one manufacturer to the other. > > > > Thank You, > Brian Webster > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]on > Behalf Of Brian Rohrbacher > Sent: Sunday, March 08, 2009 3:05 PM > To: WISPA General List > Subject: Re: [WISPA] radio mobile > > > I'm trying to figure out coverage around access points. > > Eric Muehleisen wrote: > FYI...If your using RadioMobile as a path calculator for PtP links, the > antenna pattern is irrelevant. Using an omni antenna for both TX and RX > will give you accurate numbers. > > -Eric > > Brian Rohrbacher wrote: > So, I have been working on radio mobile for the past couple days. I > need to make my antenna patterns. I use ubiquiti powerstations and > need to find the info on the antenna. How do I look up that info on > the fcc website? FCC Part 15.247, IC RS210 is the info I have from > the data sheet. Will that work? > > Brian > > Mike Hammett wrote: > Yeah, lot lower risk that way. > > > ----- > Mike Hammett > Intelligent Computing Solutions > http://www.ics-il.com > > > > -------------------------------------------------- > From: "Brad Belton" <b...@belwave.com> > Sent: Friday, March 06, 2009 12:26 PM > To: "'WISPA General List'" <wireless@wispa.org> > Subject: Re: [WISPA] radio mobile > > > Ha...pretty funny. I don't buy from an EBay seller unless they DO > take > PayPal. > > Best, > > > Brad > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Marlon K. Schafer > Sent: Friday, March 06, 2009 10:41 AM > To: WISPA General List > Subject: Re: [WISPA] radio mobile > > Ok, I finally figured out how to send payment to you. I HATE paypal!!!! > I > had to create an account in order to send this. I don't even buy things > from ebay if they only take paypal, that's how much I appreciate your > helping me.... > > Anyway, what's next? > > thanks, > marlon > 509.988.0260 > > ----- Original Message ----- > From: "Jerry Richardson" <jrichard...@aircloud.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Tuesday, March 03, 2009 7:42 PM > Subject: Re: [WISPA] radio mobile > > > > For Terrain data, set up RM to automatically grab the correct > terrain > data as needed. > - Open RM > - Options > - Internet > - Internet ftp directory -> other -> Enter the following ftp appending > your region at the end > ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SRTM1/ > > To determine your region: > ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SRTM1/Region_definition.jpg > > Check ZIP > > So if you are region 2 your FTP address will look like: > ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SRTM1/Region_02/ > > Let me know when you have this set up. > > As far as payment, you can do PayPal without an account - just send it > to jrichard...@aircloud.com. > > > __________________________________ > Jerry Richardson > airCloud Communications > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Marlon K. Schafer > Sent: Tuesday, March 03, 2009 7:25 PM > To: WISPA General List > Subject: Re: [WISPA] radio mobile > > I understand that. Why do you think I'm even trying to learn it? > > Still, programmers shouldn't be so danged lazy! How hard can it be to > put a good install program in place? Or a map (hey, what a thing for a > mapping program to include!) that you can click on to download the data > you are interested in.... > marlon > > ----- Original Message ----- > From: "Mark McElvy" <mmce...@accubak.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Tuesday, March 03, 2009 7:17 PM > Subject: Re: [WISPA] radio mobile > > > > You may think it is a POS but try and buy something that can do > what > > it > > can. > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] > > On > > Behalf Of Marlon K. Schafer > Sent: Tuesday, March 03, 2009 9:11 PM > To: WISPA General List > Subject: Re: [WISPA] radio mobile > > Sold! > > I tried to download the terrain data, but I got the NED instead of the > srtm. > I don't know which data set to get. WHAT a POS system this is! > > Also, I don't have paypal. If you'll take a cc or check I'm in. > > laters, > marlon > > ----- Original Message ----- > From: "Jerry Richardson" <jrichard...@aircloud.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Tuesday, March 03, 2009 11:54 AM > Subject: Re: [WISPA] radio mobile > > > > I'll get you from zero to terrain analysis in about an hour. > > You'll need to get your SRTM data loaded first - do you know how to > > do > > that? > > We can use ZOHO Web Meeting. > > Price 100.00 paid via PayPal > > __________________________________ > > airCloud Communications > Broadband for Business > Public and Private WiFi > > Jerry Richardson > VP Operations > 925-260-4119 > _____________________________________________ > > ConsuWISP > RF Topographical Coverage Maps > Network Optimization and Planning > Network Design and Troubleshooting > Installer and Technician Training > > Please consider the environment before printing this email > > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] > > On > > Behalf Of Marlon K. Schafer > Sent: Tuesday, March 03, 2009 6:54 AM > To: WISPA General List > Subject: Re: [WISPA] radio mobile > > I don't have time (or the desire) to wade through a bunch of > documentation. > > I'll pay someone for their time. > > thanks, > marlon > > ----- Original Message ----- > From: "Josh Luthman" <j...@imaginenetworksllc.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Monday, March 02, 2009 11:10 PM > Subject: Re: [WISPA] radio mobile > > > > Uhm...ya... > > Try this... > > http://www.pizon.org/radio-mobile-tutorial/index.html > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > Those who don't understand UNIX are condemned to reinvent it, > > poorly. > > --- Henry Spencer > > > On Tue, Mar 3, 2009 at 1:43 AM, Marlon K. Schafer > <o...@odessaoffice.com>wrote: > > > Hi All, > > I need to learn how to use this program. I can't even figure out > > how > > to > > get > started with it (less than user friendly isn't it!) though. Anyone > willing > to spend some time on the phone and help me figure out the basics? > > Shoot me your number and a good time to call. > > thanks, > marlon > > > > > > > -------------------------------------------------------- -- > -------------- > > -------- > > WISPA Wants You! Join today! > http://signup.wispa.org/ > > > > -------------------------------------------------------- -- > -------------- > > -------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > ---------------------------------------------------------- -- > ------------ > > -------- > > WISPA Wants You! 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