Hey Marlon, Thanks for the input. One thing I put wrong here was the link is actually 6 miles. I doubt it's multipath though since both ends are on towers that are on hilltops much higher than the surrounding area with clear LOS. I tried several radios & antenna combos though from big to small. It was the big Rocket5 Dish that finally fixed it.
Thanks again! -RickG On Wed, Aug 18, 2010 at 10:30 AM, Marlon K. Schafer <o...@odessaoffice.com>wrote: > This looks a lot like multipath. > > What size grid are you using? For only 3 miles a small 15 dB or less panel > should be more than enough. > > Try moving the end up or down, sometimes by only a couple of feet. > > marlon > > ----- Original Message ----- > From: "RickG" <rgunder...@gmail.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Thursday, August 05, 2010 1:01 PM > Subject: [WISPA] Ubiquiti Link - Poor Performance > > > > Here is a good one! > > > > I have a short "link" of about 3 miles from my main tower to another. > > On the main tower I have four UBNT 5G-20-90's with RockeyM5's running > > firmware 5.2. All have performed very well since I installed them > > earlier this year. On the other end at the problem tower I have a 26Db > > grid with a BulletM5 also running fw5.2. The link was doing well until > > two days ago. Then, the latency went through the roof. I assumed it > > was the radio but after switching it out twice, I decided to blame the > > antenna. So, I swapped out the grids multiple times. Then decided to > > try a Nanostation, and a Nanobridge but got worse results. I'd blame > > the sector on the main tower but another link on it remains working > > well. There is a topology difference between the working link and the > > poor link with the later being higher. There is some noise in the area > > but not unusual. What I do note is that the main tower does not "see" > > the far end very well (-78) and it should really be much higher. The > > receive rate is only 6.5Mbps. > > > > At any rate, I've got about 3 dozen subs on this tower and worked on > > it until 5am so I'm ready for some fresh input! > > > > Thanks in advance! > > -RickG > > > > > > > -------------------------------------------------------------------------------- > > 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/ >
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