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   Compute the temperature of an attenuator. 
   t is the ambient temperature of the attenuator and tE is the effective 
   input noise temperature. Has a demo.
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   Form:
   tE = TAttenuator( t, loss )
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   ------
   Inputs
   ------
   t             (1,:)  Ambient temperature of the attenuator
   loss          (1,:)  Loss (dB)
                        
   -------
   Outputs
   -------
   tE            (1,:)  Effective input noise temperature
                        
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	 References: Maral, G. and M. Bousquet. (1998.) Satellite Communications
                Systems. Wiley. pp. 17-18.
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