Topic: Communication Systems
For an earth station transmitter input power of 40 dBW (10,000 W), with a back off loss of 3 dB, a total branching and feeder loss of 3 dB, and a transmit antenna gain of 40 dB, determine the EIRP.
- A. 40 dBW
- B. 74 dBW
- C. 34 dBW
- D. 80 dBW
Answer: B. 74 dBW
Explanation: $EIRP = P_{t} + G_{t} - L_{backoff} - L_{(branching+feeder)} = 40 + 40 - 3 - 3 = 80 - 6 = 74~dBW$.