Also trying to get a good signal in the far reaches of some houses can be a lot more challenging at 5 GHz than 2.4 GHz.
From: Eric Kuhnke Sent: Wednesday, February 17, 2016 7:03 PM To: af@afmug.com Subject: Re: [AFMUG] Cambium 450i 900Mhz Until customers complain their stuff doesn't work, a lot of cheap laptops, tablets and many low to mid range android phones are 2.4 only. On Feb 17, 2016 4:55 PM, "Rory Conaway" <r...@triadwireless.net> wrote: If I do this, I’ll probably use 5Ghz for the indoor devices to avoid 2.4GHz where possible. Rory From: Af [mailto:af-boun...@afmug.com] On Behalf Of Eric Kuhnke Sent: Wednesday, February 17, 2016 5:15 PM To: af@afmug.com Subject: Re: [AFMUG] Cambium 450i 900Mhz 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" <r...@triadwireless.net> wrote: I may set up a test for this in couple weeks. Rory From: Af [mailto:af-boun...@afmug.com] On Behalf Of Eric Kuhnke Sent: Wednesday, February 17, 2016 4:41 PM To: af@afmug.com 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" <af...@zirkel.us> 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 <r...@triadwireless.net> wrote: So given this scenario, would 2.4GHz be better? I can use 5GHz inside the houses. Rory From: Af [mailto:af-boun...@afmug.com] On Behalf Of Chuck McCown Sent: Wednesday, February 17, 2016 2:57 PM To: af@afmug.com 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 Sent: Wednesday, February 17, 2016 2:13 PM To: af@afmug.com 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 <samtaos...@gmail.com> 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 <ch...@wbmfg.com> wrote: Ponderosa? Fir? Cedar? The length of the needles matter. From: Rory Conaway Sent: Wednesday, February 17, 2016 12:51 PM To: af@afmug.com 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 r...@triadwireless.net 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
