Question

3. Assume a 15-mw power source at A, A----------->B, and the receiver at B requires at least 0.01
mw for reception. What is the maximum allowable length for the following transmission lines if a
signal at B is to be received? There may be unused information here but it gives you an idea of
losses.
a. 24-gauge twisted pair operating a 100MHz, 50 dB/km attenuation.
b. 1/4 in. coaxial cable operating a 1GHz, 30 dB/km attenuation.
c. optical fiber operating near its optimal frequency, 0.10 dB/km attenuation.

Answer 1