Randy, 24Ghz is sometimes thought of as interference free, based on its approximate 1.5 degree beamwidth at 2ft, and about 2.6 degree beamwidth at 1ft dish. The dragonwave works on 40mhz channels and allows setting to one of two channels sets (A 24078500 tx and 24173829 rx, or B 124126170 tx 24221500 rx) And then you have polarity diversity. The antennas have about a -68 F/B ratio, so getting channel reuse at a tower is pretty doable. Currently there is not alot of noise out there, because there weren't a lot of products out there, and most people that were willing to spend the money for high end gear, were willing to buy 23Ghz licenses. But it doesn't mean its going to stay that way. For us it has worked pretty well.
I will say... I've had a hard time getting one of my 24Ghz links Dragonwave links to reach target RSSI, I'm about 15db off. I think its a problem with one of the antennas, but I haven't figured it out yet. With 1-5db low power, its less forgiving on the link budget, if something is wrong to hurt the link budget. Rain fade is high. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Randy Cosby" <dco...@infowest.com> To: <wireless@wispa.org> Sent: Friday, March 27, 2009 4:08 PM Subject: [WISPA] 24ghz links > I'm considering a 24ghz link for a 3 mile shot. The path calcs all work > fine for our use, climate, etc. > > I'm interested in hearing first from anyone who has used 24 gigahertz > radios (dragonwave most likely). Have you had any interference issues? > Any recommendations on what to check for besides the clear LOS before > putting something like this up? How far should you be away from other > 24gig towers? I thought I had read that the beam was so narrow, > interference was quite rare, but wanted to hear some real life > experiences. > > Thanks! > > -- > Randy Cosby > Vice President > InfoWest, Inc > > work: 435-773-6071 > email: rco...@infowest.com > > http://www.linkedin.com/in/randycosby > > > > -------------------------------------------------------------------------------- > 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! 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/
