On Thu, 2009-06-18 at 09:34 -0700, John van Oppen wrote: > -----Original Message----- > From: Tim Huffman [mailto:t...@bobbroadband.com] > Sent: Thursday, June 18, 2009 9:27 AM > To: nanog@nanog.org > Subject: RE: Wireless bridge > > > The line of sight is all clear, no trees. Only one building along > the > way > > has a rooftop of similar height, but the antennas are extended far > above > > the > > roofline. We have used a rifle scope to confirm line of sight is all > clear > > at all angles. > > > > Unfortunately, you can't necessarily rely on visual line of sight. At > 800meters, the Fresnel Zone on your radio is about 14ft in diameter at > the midpoint. You need to make sure that this is free of obstructions. >
Not only that, the radios may actually be screaming at each other at those distances which will affect performance
