Hi Dennis & Bill,
Very interesting topic for all of us!
My locations (NYC & surroundings) are mostly concrete jungles. 6-7 story high pre-war buildings constructed of brick, steel, & concrete and packed T-I-G-H-T. On our first large scale deploy (did mostly indoor stuff until now), we're using sB aPPO with Maxrad MSO24014PTNF sectorized omni 14dBi total. This omni has 3 sectors, so divide the total dBi by 3 for actual. We've got a 2nd aPPO ready to be hooked up to the Maxrad if needed in the future. We've also got another aPPO connected to a MobileMark 12dBi omni whip antenna. Really, we just put this up first to see if it would work since it was nice and cheap. It has good range, but only a 7 degree downtilt so it's not good for the buildings we've installed on top of.
Was able to get out .8mile from basestation and get a 25% signal using airNIC on the 9th floor of a building. (This really impressed me!!)
Alex from sB tech support has recommended the following settings on the aPPOs and CPEs:
Fragmentation Threshold = 1500
RTS/CTS = 500 (from an article Alex recommended on www.80211planet.com )
I've put a few customers online so that I can test from their point-of-view and I'm awaiting more feedback.
I think that you guys are onto something with field test results. Maybe we can start putting together a database for sB to put on their website? How 'bout it sB?
Kind regards,
Sevak
Sevak Avakians
diDi Wireless Communities, Inc.
646-526-9664
1-866-diDi-NET
www.didiwireless.com
On Mon, 2003-07-28 at 13:02, Dennis Burgess wrote:
Yes, no amps, max power on a APPO to a Maxrad WISP 90 sector though thick forest. That goes to a ABI inside the house with a stock antenna.
Dennis
----- Original Message -----
From: Joe Email
To: [EMAIL PROTECTED]
Sent: Sunday, July 27, 2003 5:30 PM
Subject: RE: [smartBridges] Coverage areas
Dennis
About Trees
Are you saying you are getting penetration with just an antenna and no amps
I know a lot of guys are using amps
I would really like to see sB go to a 100MW (20dB) radio, that would help some
We have a tremendous tree problem here in east Texas
thanks
Joe K
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Dennis Burgess
Sent: Sunday, July 27, 2003 2:18 PM
To: [EMAIL PROTECTED]
Subject: Re: [smartBridges] Coverage areas
Bill,
Thanks for the info.
Just a FYI, wiith a 14db Sector from Maxrad I shot though dense trees (not above but though) for 1/4 of a mile and still could penitrate the basement concrete walls.
The trees are mostly oaks around 50-60 foot plus heavy coverage. You can see about 30 feet into the woods from this location before all the leaves and such block your view.
Dennis
----- Original Message -----
From: Bill Flood
To: [EMAIL PROTECTED]
Sent: Sunday, July 27, 2003 8:57 AM
Subject: Re: [smartBridges] Coverage areas
Dennis,
RF is a funny thing.... Trees - What kind? See 2.4 Ghz travels though things and some things it doesn't. I have had some success shooting through red and white pines. The density is key. How many trees? How do you measure or describe? There is a figure out there that says that you lose .35 db for every meter of foliage you pass through. I think this is just a ball park statement. If this statement was coupled with the particular tree type found around the globe it would be a much more useful tool. Possibly as a group (organized) we could test certain applications and then develop our own figure for sending signal through foliage, but if you think about that the outcome would be as vague as the .35 db statement above or have so many variable attached it may render it useless.
Take this scenario. You learn how to shoot darts at a dart board. Soon you find yourself hitting a bulls eye each time. Someone asks you how you do it. You reply,"I don't know, I just practised a lot. I throw and it gets there".
You need to make tests in those areas and simply figure this one out on your own. When on the roof you need to move around until you find the sweet spot. Then remember if you are in an area where the leaves fall off the trees, be careful to take your positioning into account. If you are setting up without leaves, look at the branch formations. Look for the holes or you'll be back next spring to move that antenna.
Consider yourself lucky to have 500 homes in a 2 mile area. Most of my repeater locations generally have 200 + cows in that same area!
The answer is time and experience!
At 12:00 AM 7/27/2003 -0500, you wrote:
Question..
One locaiton that I am intrested in providing service, is mostly trees. In otherwords, everywhere around has trees other than backyards or roads. Now, my antenna would be above these trees and I do get a good Visual coverage from Radio Mobile with a decent tower. How does that translate to customers?
I have about 500 homes within 2 miles of this tower, everything from moble homes to some nice subdivisons. But again, unless they were in the way of buliding the homes, most have tree cover. I have heard mixed responce about the penterating power of this signal.
Dennis
Bill Flood
AirRunner Networks LLC --- We make the web fast!
If you get tired of the wait call 715-443-3700!
|
