Key Topic 67: Effective Radiated Power

Question 1

3-67J1: What is the effective radiated power of a repeater with 50 watts transmitter power output, 4 dB feedline loss, 3 dB duplexer and circulator loss, and 6 dB gain?

A. 158 watts.
B. 39.7 watts.
C. 251 watts.
D. 69.9 watts.

Answer 1

B. 39.7 watts.

Question 2

3-67J2: What is the effective radiated power of a repeater with 75 watts transmitter power output, 4 dB feedline loss, 3 dB duplexer and circulator loss, and 10 dB antenna gain?

A. 600 watts.
B. 75 watts.
C. 18.75 watts.
D. 150 watts.

Answer 2

D. 150 watts.

Question 3

3-67J3: What is the effective radiated power of a repeater with 75 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 6 dB antenna gain?

A. 37.6 watts.
B. 237 watts.
C. 150 watts.
D. 23.7 watts.

Answer 3

A. 37.6 watts.

Question 4

3-67J4: What is the effective radiated power of a repeater with 100 watts transmitter power output, 4 dB feedline loss, 3 dB duplexer and circulator loss, and 7 dB antenna gain?

A. 631 watts.
B. 400 watts.
C. 25 watts.
D. 100 watts.

Answer 4

D. 100 watts.

Question 5

3-67J5: What is the effective radiated power of a repeater with 100 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 10 dB antenna gain?

A. 126 watts.
B. 800 watts.
C. 12.5 watts.
D. 1260 watts.

Answer 5

A. 126 watts.

Question 6

3-67J6: What is the effective radiated power of a repeater with 50 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 7 dB antenna gain?

A. 300 watts.
B. 315 watts.
C. 31.5 watts.
D. 69.9 watts.

Answer 6

C. 31.5 watts.