XPost: microsoft.public.windowsxp.general, sci.electronics.repair   
   From: beretta@nun-ya-bizness.com   
      
   This is a multi-part message in MIME format.   
   On 10/14/20 12:45 AM, Arlen Holder wrote:   
   > On Wed, 14 Oct 2020 00:23:10 -0700, Johann Beretta wrote:   
   >    
   >> Clearly you don't do this for a living.   
   >    
   > That is an absolutely correct assessment.   
   >    
   > You can advise the OP better than I on potential Fresnel Zone issues, as    
   > he's apparently asking how best to paint a LOS location 800 feet away with    
   > the transceiver on a pole I believe.   
   >    
   > You can run the math to explain to him how high that pole may need to be.   
   > (We do that stuff by trial and error - but you may know the math better.)   
   >    
   > Please advise the OP on the math so he knows how high to mount the radio.   
   >    
      
   All he has to do is search google for "fresnel zone calculator"   
      
   At 1,056 feet (0.2 miles) the Fresnel for 5.1 GHz is 7.1 feet.   
   (for 5.8 Ghz it would be 6.7 feet). The higher the freq, the smaller the   
   zone.   
      
   You can intrude the fresnel by 40% (max), but I try to avoid even that.   
      
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