The CPE is a LiteStation5 running OSWave firmware (stock LS5 firmware did not work with Routing/Nat/DHCP), in a 23 dBi ARC Wireless antenna.
The trees around here (NE Dallas area) are some pine, oak, pecan, locust, etc. Right now the trees are a little damp from a ton of rain the past few days. Signal levels for the 3/4 mile link with ~1/4 mile trees is: -69 dBm Rx at the CPE -72 dBm Rx on the tower Without the trees that link would be WAY higher than that. I also have a client about 2.5 - 3 miles away NLOS (maybe 1 or 2 treelines) that sits around -80 dBm on both sides. He's been up for almost a year and I don't think it's ever dropped from attenuation. Right now 100% of my clients are on 5.8 GHz. After working with it in the field for a while I can vouch for it being one heck of a tricky animal. Links that look perfectly fine in radiomobile just flat out don't work, and others that RM shows will never work haven't even dropped a single time since they've been up. I just started adding 900 to my towers so I don't have to brute-force my way through iffy links with higher power on 5ghz. Graham McIntire Verona Networks On 6/22/07, Mike Hammett <[EMAIL PROTECTED]> wrote:
Could you provide some sort of numbers? How much loss does that 1/4 mile of water-retaining trees have? The town is basically a square with the tower on the far west side in about the center. It is 1/2 mile to the extreme corners, so there are a lot of people 1/4 mile and less. Someone on another list mentioned water retention as a show-stopper, but my limited experience had me thinking just about anything less than a 1/2 mile would work. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Graham McIntire" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Friday, June 22, 2007 11:25 AM Subject: Re: [WISPA] 5 GHz attenuation >I have two towers running MT APs at 5.8 with CM9s and 16 dBi horiz > sectors. Using Osbridge 5GXi's as the CPE, I have clients a few miles > out with non-LOS and the occasional treeline without any issues. > > I also have one house about 3/4 mile away from my tower that's going > through nearly 1/4 mile of scattered trees. It attenuates pretty > badly during heavy rain until the leaves on the trees dry out, but > stays connected. It's my parents-in-law's house, so they're a little > more forgiving if it happens to drop than a client would be ;) > > Half a mile with scattered trees shouldn't be a problem for you, even > with snow/rain attenuation. > > Graham McIntire > Verona Networks > > > On 6/22/07, Mike Hammett <[EMAIL PROTECTED]> wrote: >> I have a 5 mile link where I'm not quite sure if the antenna is above the >> trees or not as it is on top of a mast. That link is on the better side >> of -80 for almost 2 years. Based on that I'd think I'd be okay at a half >> mile or less. I figured that with most of the town at better than -60 >> and a >> lot better than -50, I could stand to go through a few meters of tree, >> but >> that's why I came here to ask. ;-) >> >> Based on the numbers on the site I looked at, 10 db of attenuation is 27' >> of >> foliage. That'd put 20 db at 55' of foliage. >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com >> >> >> ----- Original Message ----- >> From: "Jack Unger" <[EMAIL PROTECTED]> >> To: "WISPA General List" <wireless@wispa.org> >> Sent: Friday, June 22, 2007 10:22 AM >> Subject: Re: [WISPA] 5 GHz attenuation >> >> >> > Mike, >> > >> > Good to go as long as the TV towers allow you to get the CPE antennas >> > above the trees. >> > >> > jack >> > >> > >> > Mike Hammett wrote: >> >> Most of my coverage area is open fields, so there isn't much to making >> >> a >> >> link work. >> >> >> >> I have an increasing demand to install an AP in a small town (no point >> >> within town is further than 1/2 mile away from the tower site). I >> >> prefer >> >> to use 5 GHz due to the amount of spectrum available. An article I >> >> read >> >> said 1.5 db per meter of foliage or 20 db per tree in 5 GHz. >> >> >> >> The grain leg is 100 - 150 feet tall. Many houses have TV towers. >> >> Radio >> >> Mobile (not counting foliage) says the worst signal I can expect to >> >> see >> >> is in the 60s with most in the 50s or 40s. >> >> >> >> Safe to assume that most of the town will be good to go? >> >> >> >> >> >> ----- >> >> Mike Hammett >> >> Intelligent Computing Solutions >> >> http://www.ics-il.com >> >> >> >> >> > >> > -- >> > Jack Unger ([EMAIL PROTECTED]) - President, Ask-Wi.Com, Inc. >> > FCC License # PG-12-25133 >> > Serving the Broadband Wireless Industry Since 1993 >> > Author of the WISP Handbook - "Deploying License-Free Wireless WANs" >> > True Vendor-Neutral Wireless Consulting-Training-Troubleshooting >> > FCC Part 15 Certification for Manufacturers and Service Providers >> > Phone (VoIP Over Broadband Wireless) 818-227-4220 www.ask-wi.com >> > >> > >> > >> > >> > -- >> > WISPA Wireless List: wireless@wispa.org >> > >> > Subscribe/Unsubscribe: >> > http://lists.wispa.org/mailman/listinfo/wireless >> > >> > Archives: http://lists.wispa.org/pipermail/wireless/ >> > >> >> -- >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > -- > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
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