I should add that in a typical environment with wood frame houses/other structures, it helps a lot to choose the 2.4 GHz channel on the home WiFi AP for each CPE location, so that none of them overlap with your carefully predetermined 10 MHz channel. On Feb 17, 2016 3:50 PM, "Rory Conaway" <[email protected]> wrote:
> I may set up a test for this in couple weeks. > > > > Rory > > > > *From:* Af [mailto:[email protected]] *On Behalf Of *Eric Kuhnke > *Sent:* Wednesday, February 17, 2016 4:41 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] Cambium 450i 900Mhz > > > > 2.4 in 10 MHz channels goes through a decent amount of trees within 1-2 > miles max, if all the CPEs are nanobridge m5-25 dishes or similar sized > reflectors... > > I've seen such setups with clients in trees and signals right around -69 > on both chains. > > Not a lot of aggregate capacity per sector however. > > On Feb 17, 2016 2:13 PM, "Sean Heskett" <[email protected]> wrote: > > I've never had any luck with 2.4 going through much more than the side of > an aspen tree. > > > > can you set up some 900 test shots? > > > > On Wed, Feb 17, 2016 at 3:09 PM, Rory Conaway <[email protected]> > wrote: > > So given this scenario, would 2.4GHz be better? I can use 5GHz inside the > houses. > > > > Rory > > > > *From:* Af [mailto:[email protected]] *On Behalf Of *Chuck McCown > *Sent:* Wednesday, February 17, 2016 2:57 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] Cambium 450i 900Mhz > > > > I have not measured one, but if someone has a pine tree nearby and an ohm > meter, measure the resistance of the needle. Make sure you jam the probe > into the interior of the thing. > > > > I am guessing that the water content of the needle absorbs some of the RF > energy al la a microwave oven. But anecdotal evidence over the past 10-15 > years has shown that pine trees are worse than others so if the needle > itself has a fairly low resistance, like 100 ohms, it is acting like a > dipole with a termination resistor. That is really going to suck up the > signal. > > > > Stealth aircraft have microwave absorbing foam on some of their surfaces > that operate by similar principles. > > > > *From:* Sean Heskett <[email protected]> > > *Sent:* Wednesday, February 17, 2016 2:13 PM > > *To:* [email protected] > > *Subject:* Re: [AFMUG] Cambium 450i 900Mhz > > > > the wavelength of 900Mhz is ~33.3cm so a quarter wave length is ~8.33cm > (~3 1/4 inch). Ponderosa pine needles (and many other pine needles) are > around the same 3 1/4 inch length > https://en.wikipedia.org/wiki/Pinus_ponderosa > > > > so with water in the needles you have a big 900Mhz RF scattering/reflector > ;-) > > > > -Sean > > > > > > On Wed, Feb 17, 2016 at 1:47 PM, Sam Lambie <[email protected]> wrote: > > So if you have a minute to please explain how evergreen trees are terrible > on 900 mhz, I would greatly appreciate it. > > > > On Wed, Feb 17, 2016 at 1:14 PM, Chuck McCown <[email protected]> wrote: > > Ponderosa? Fir? Cedar? > > > > The length of the needles matter. > > > > *From:* Rory Conaway <[email protected]> > > *Sent:* Wednesday, February 17, 2016 12:51 PM > > *To:* [email protected] > > *Subject:* [AFMUG] Cambium 450i 900Mhz > > > > Realistically, what kind of distances do you get through these types of > trees? > > > > > > *Rory Conaway **• Triad Wireless •** CEO* > > *4226 S. 37th Street • Phoenix • AZ 85040* > > *602-426-0542 <602-426-0542>* > > *[email protected] <[email protected]>* > > *www.triadwireless.net <http://www.triadwireless.net/>* > > > > “The ultimate measure of a man is not where he stands in moments of > comfort or convenience, but where he stands at times of challenge or > controversy” – Martin Luther King > > > > > > > -- > > -- > *Sam Lambie* > Taosnet Wireless Tech. > 575-758-7598 Office > www.Taosnet.com <http://www.newmex.com> > > > > >
