Wireless bridge

Bret Clark bclark at spectraaccess.com
Thu Jun 18 17:56:52 UTC 2009

On Thu, 2009-06-18 at 09:34 -0700, John van Oppen wrote:

> -----Original Message-----
> From: Tim Huffman [mailto:Tim at bobbroadband.com] 
> Sent: Thursday, June 18, 2009 9:27 AM
> To: nanog at 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

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