Hmmm, hadn't thought of that solution. Good catch! I try to keep my links to 15 miles or less so that I can have an AP at each one and cover the area in between. That helps with a lot of strange performance issues too.
Thanks for the tip, I might have to try some n radios after all :-). It's funny how relatively open rules have so rapidly and completely changed everything in our industry. 10 years ago when I started a link with antenna diversity would cost nothing less than $50 or $100k. Usually a lot more. Just to get 10 to 20 megs. Half a million for 100meg. Now we can do it for a few hundred bucks per end. the quality isn't as good with today's gear, but for the cost we can put in 5 of them and have 100% up time instead of a "mear" 5 nines. marlon ----- Original Message ----- From: "Jeremy Parr" <jeremyp...@gmail.com> To: "WISPA General List" <wireless@wispa.org> Sent: Wednesday, October 28, 2009 6:51 AM Subject: Re: [WISPA] Long 5Ghz link over water 2009/10/28 Marlon K. Schafer <o...@odessaoffice.com>: > It's probably ducting. Where the conditions in the AIR literally bend the > signal over or under your receive antennas. > > You'll likely have to put in a system designed with something called > "antenna diversity". Basically two antennas for each link. One 10 to 20' > higher than the other one. Then the radio will listen to the two of them > and switch to the one with the greater signal levels for it's data flow. > > I always wanted to try this using a splitter placed EXACTLY in the middle > of > the two. But with wave lengths so small I don't think it's likely that I'd > get it close enough without a lot of blind luck (get it wrong and you > create > multipath inside the cables). Exactly. My thoughts went to an 802.11n card, with two antennas on each end. -------------------------------------------------------------------------------- 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/
