Is going to circular polarization an option? Greg
On Oct 28, 2009, at 8:50 AM, Jeremy Parr wrote: > I have a 23 mile link completely over water that I cannot get stable. > One end is approx 200ft AGL, 220ft ASL, the other end is 50' AGL, 90' > ASL. Antennas are V-Pol 29dbi grids, radios are R5H cards. I have > tried the link at both 5.2, and 5.8, but it still fluctuates > dramatically. When the antennas were installed and configured for a > 5Mhz channel, I was able to aim them to -55, but still they go down > during parts of the day. I have a second antenna hung on the 200ft > end, at about 185', connected to a second R5H set up for H-Pol which I > am going to light up as soon as I get the other end mounted H-Pol. Any > other suggestions for getting this stable? I also notice some > strangeness when doing bandwidth tests. I can get a steady 8mbps > downstream from the 200ft end to the 50' end, but from the 50' end to > the 200ft end, the transfer starts at about 6mbps, then slowly drops > down to 0, and the client radio (the 50' end) drops. My assumption is > multipath reflections off of the water at the lower end, but I cannot > be sure. The water is tidal, with as much as a 3' change from low to > high, and is connected to the ocean, so there can be considerable chop > and wave action on the surface. > <graph_image.php.png> > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > 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: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
