http://www.dslreports.com/forum/r18080494 en Wed, 02 Dec 2009 13:01:06 EDT Wed, 02 Dec 2009 13:01:06 EDT http://www.dslreports.com/forum/remark,18081160 karlmarx : well, considering in general terms, the radio distance is defined as O(ptical) = sqrt(2h(r))+sqrt(2h(t)), where O = distance to optical horizon, and h=(r)receiver height, and h(t) is transmitter height. So assume the antenna is 20' at both sides. The optical distance would be approximately sqrt(2*20) + sqrt(2*20) = Appx 12.5 miles.

Now we calculate the loss.

PL = 117 + 20log10fMhz-20log10hthr+40Log10D
Where 117 = Constant
2.4Ghz
20' and 20'
Distance of 12 miles

So it's about 175db loss over that distance. Thus, the antenna is the key, because with a 175db loss, the antenna is going to have to be pretty tight.
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Stick it to the MAN. Support your local torrent sites. Proudly providing 100mb of upstream for all your TV, Movie, and MP3 needs.]]> http://www.dslreports.com/forum/remark,18081160 Thu, 29 Mar 2007 00:36:10 EDT http://www.dslreports.com/forum/remark,18081067 RadioDoc : Well, them frequencies are not used for plain vanilla 802.11 WiFi...
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Toolmaster of La Grange.]]> http://www.dslreports.com/forum/remark,18081067 Thu, 29 Mar 2007 00:07:22 EDT http://www.dslreports.com/forum/remark,18081038 Kompressor : Depending on what frequency you are transmitting on, it is possible for a simplex signal to go around the world. ]]> http://www.dslreports.com/forum/remark,18081038 Thu, 29 Mar 2007 00:00:18 EDT http://www.dslreports.com/forum/remark,18080494 RadioDoc : Except that unless you have an extremely high transmit and/or receive location you are not going to get anywhere near 60 miles LOS. The curvature of the earth makes sure of that. The 'world record' referenced by Karl Bode used two mountaintops. How many regular users have a couple of 7500 foot mountain peaks laying around?
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Toolmaster of La Grange.]]> http://www.dslreports.com/forum/remark,18080494 Wed, 28 Mar 2007 22:10:24 EDT http://www.dslreports.com/forum/remark,18078275 shoan : sometimes I just have to shake my head at things. Just knowing that they can do things like this yet this is slated for places outside of the US just makes for a sad penguin]]> http://www.dslreports.com/forum/remark,18078275 Wed, 28 Mar 2007 15:07:23 EDT http://www.dslreports.com/forum/remark,18078265 listenup : Why sell a software solution when you can sell a hardware solution too?]]> http://www.dslreports.com/forum/remark,18078265 Wed, 28 Mar 2007 15:05:27 EDT http://www.dslreports.com/forum/remark,18078251 woody7 : why not here? ;)
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BlooMe]]> http://www.dslreports.com/forum/remark,18078251 Wed, 28 Mar 2007 15:03:46 EDT