Hi,
the Horizon correction is 72m, the 0,6 freznel zone radius is 28m, and the
path loss is 136,91 db @ 70km.
With the orinoco card, at the given distance, @11mbps/-82db RX sensitivity,
you will get 0,69 db of fade margin, using 24dbi grids, and 1,5 db misc
cable/connector loss on each side, which is way too low. If timing isn't an
issue at this distance, you'll have to use amps, to get a reliable
connection.
With your 31 dbi dish antennas you'll get 14,69 db at this distance with the
above misc loss. This should work.
Hope, it'll help.
Saludos
Bernardo
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com] On Behalf Of Bruno
> Lopes F. Cabral
> Sent: Tuesday, May 13, 2003 2:58 PM
> To: Karlnet Mailing List
> Subject: Re: [Karlnet] TC on 70km link?
>
>
> Hi there
>
> 1 meter down each 6 km, I was told
>
> Cheers
> !3runo
>
> > What is the true curvature of the earth at that distance?
>
> > > > My setup: two 1.5 meters solid parabolic 31dBi antennaes, 105m
> > > > high on one side, 660m on the other, about 70km between the
> > > > points.
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>
>
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