If you have 100% Fresnel Zone 1 clearance, instead of 60% FZ1 which is the usual parameter over land, you are probably good to go.
As these sites are more prone to rust, I would strongly prefer integrated units instead of dish antennas; Ubiquiti Powerbridge M comes to mind, both because not having RF cables and connectors to rust and being dual-polarity. If you want diversity, consider adding a 900 MHz backup-link to the 5.8 GHz main-link. Stay away from 2.4 GHz, it would only contribute to global warming... :-) (Rocket M 900 with two Yagis, may be ?) Rubens On Wed, Dec 1, 2010 at 7:51 PM, Tom Sharples <tsharp...@qorvus.com> wrote: > Hi, we need to install an aprox. 8 mile PTP 5.8Ghz link near the Big Island > in Hawaii. One end will be at about 50ft MSL, while the other end is at > about 3500ft. The first 4 miles are over water, with rest over moderately > hilly terrain to a freestanding 50ft tower. The ends have LOS. Ordinarly I'd > just use a conventional setup with a pair of 2' dish antennas and XR5 > radios, but am considering using dual-polarity feedhorns (or even separate > dishes) and diversity or dual radios due to the water. Is this worth the > effort, or should we just use e.g. horizontal polarity and stick to it? > Since the one end is much higher than the other I'm thinking this should > mitigate water effects, but would welcome any opinions. > > Thanks, > > Tom S. > > > > -------------------------------------------------------------------------------- > 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/
