If the line is supplied with a pulsed signal and the line is not matched at the ends, the pulses sent in to the line will more or less reflected as a function of the mismatch. The reflected fraction of the pulse moves along the line in the opposite direction to the impedance of generator it is again reflected to the other end. The purpose of this test is to study the propagation of the pulse edges along the line, under different matching conditions viz open line, short circuit line & matched line.
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