Suppose the voltage waveform shown in Fig. 1 was observed at the sending end of a 50-Ω tra...

Suppose the voltage waveform shown in Fig. 1 was observed at the sending end of a 50-Ω transmission line in response to a step voltage introduced by a generator with Vg = 15 V and an unknown series resistance Rg. The line is 1 km in length, its velocity of propagation is 1 × 108 m/s, and it is terminated in a load ZL = 100 Ω.

(a) Determine Rg.

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(b) Explain why the drop in level of V(0, t) at t = 6 μs cannot be due to reflection from the load.

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(c) Determine the shunt resistance Rf and location of the fault responsible for the observed waveform.

Figure 1

Voltage waveform.