[BC] Satellite sensitivity...

WFIFeng@aol.com WFIFeng
Thu Feb 16 11:13:43 CST 2006


In a message dated 02/16/2006 10:49:22 AM Eastern Standard Time, 
Towers at mre.com writes:

> Think about it, a 3.8M 
>  dish with 40dB of gain has a power gain multiplication of 10,000.  Put 100 
>  watts into the feed point and you have a 1MW ERP emission.  5 meter dishes 
>  is easily 5MW when driven with 200 watts.
>  

So then how do these sats receive the 121.5 Mhz signals coming from milliwatt 
transmitters with whip antennas? That is pretty amazing, IMHO.

Willie...


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