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An earth station receiver has an effective noise temperature at its input (call it point A)...

An earth station receiver has an effective noise temperature at its input (call it point A) equal 30K. If an antenna of effective temperature of 50K is connected to the receiver via a lossy waveguide. Find the noise temperature at the point A (in K unit), if the wave guide has a loss of 2.5 dB. Consider T(0) = 290K.
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