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8.6 A communications satellite is in orbit 35 800 km above an earth station. The down path from satellite to earth station operates at 4 GHz. At the earth station the receiver has an effective input noise temperature of 60 K and a bandwidth of 30 MHz, the parabolic dish aerial has a gain of 60 dBi, and the aerial noise temperature is 40 K. If the e.r.p. of the satellite is 30 dBW, calculate (a) the carrier-to-noise ratio of the receiver, and (b) the G/T ratio.

8.6 A communications satellite is in orbit 35 800 km above an earth station. The down path from satellite to earth station operates at 4 GHz. At the earth station the receiver has an effective input noise temperature of 60 K and a bandwidth of 30 MHz, the parabolic dish aerial has a gain of 60 dBi, and the aerial noise temperature is 40 K. If the e.r.p. of the satellite is 30 dBW, calculate (a) the carrier-to-noise ratio of the receiver, and (b) the G/T ratio.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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The answer according to three book is (a) 28.27 db , (b) 40 db k^-1 Please don’t submit the answer if the result isn’t the same
8.6 A communications satellite is in orbit 35 800 km above an earth station. The down path from satellite to earth station operates at 4 GHz. At the earth station the receiver has an effective input noise temperature of 60 K and a bandwidth of 30 MHz, the parabolic dish aerial has a gain of 60 dBi, and the aerial noise temperature is 40 K. If the e.r.p. of the satellite is 30 dBW, calculate (a) the carrier-to-noise ratio of the receiver, and (b) the G/T ratio.
Transcribed Image Text:8.6 A communications satellite is in orbit 35 800 km above an earth station. The down path from satellite to earth station operates at 4 GHz. At the earth station the receiver has an effective input noise temperature of 60 K and a bandwidth of 30 MHz, the parabolic dish aerial has a gain of 60 dBi, and the aerial noise temperature is 40 K. If the e.r.p. of the satellite is 30 dBW, calculate (a) the carrier-to-noise ratio of the receiver, and (b) the G/T ratio.
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