Find the distance of the fault from the source

Assignment Help Mechanical Engineering

Reference no: EM131213271

In Example 16.3, suppose that the amplitude of the reflected wave equals 99% of the amplitude of the forward-propagating wave. What is the impedance of the fault if the intrinsic line impedance is Z₀ = 200 Ω?

EXAMPLE 16.3

Time domain reflectometry is a method of testing that relies on reflections from mismatched loads to locate the load. This is very useful in locating short circuits or cuts in inaccessible lines such as underground cables. A pulse is sent on the line and its reflections are recorded on a screen or chart. The distance between every two pulses is twice the time it takes to propagate to the fault. If the speed of propagation is known for the line, the exact location of the fault can be found. From the magnitude, shape, and sign of the signals, it is also possible to evaluate the type of fault (short, low or high impedance, open) before repair. This can save considerable time and labor, especially if cables are buried.
considerable time and labor, especially if cables are buried. A lossless underground telephone cable has inductance per unit length of 1μH/m and capacitance of 25 pF/m. The cable has developed a fault and it is required to locate the fault and identify its nature. The time-domain reflectometer reading looks as in Figure 16.9.

(a) Find the distance of the fault from the source.

(b) What kind of fault does the cable have?

Reference no: EM131213271

Questions Cloud

Write a paper on given topics : Describe a situation of public interest in which critical and/or creative thought could have been used for a better outcome.

Implied value of total factor productivity : Suppose India has a per capita GDP that is .074 times the United States GDP. It has a capital-per-person ratio that is .035 times that of the United States. Compared to the United States, the implied value of total factor productivity for India is..

What foods will the nurse say protein is found : A pregnant client tells the nurse that she is taking megadoses of vitamin A in the hopes that it will keep her complexion clear throughout the pregnancy. What could the nurse say about the client's use of this vitamin supplement?

Definition of the break-even point : In a factory operating at capacity, not every machine and person should be working at the maximum possible rate. The cost of factory machinery purchased last year is: Which of the following is NOT a correct definition of the break-even point?

Find the distance of the fault from the source : In Example 16.3, suppose that the amplitude of the reflected wave equals 99% of the amplitude of the forward-propagating wave. What is the impedance of the fault if the intrinsic line impedance is Z0 = 200 Ω?

Describe some of the similarities between us gaap and igaap : Briefly describe some of the similarities and differences between U.S. GAAP and iGAAP with respect to balance sheet reporting.

Cost minimizing level of capital that ?rm : The wage rate for labor is w = 2, the rental rate of capital is r = 1, and the cost of materials is m = 4 per unit. What is the long run cost minimizing level of capital that the ?rm must use to produce a target level of output, Q = 1000?

Assessed by the environmental protection agency : Fores Construction Company reported a pretax operating loss of $220 million for financial reporting purposes in 2016. Contributing to the loss were (a) a penalty of $15 million assessed by the Environmental Protection Agency for violation of a federa..

Grant patents to companies that research new drugs : Why does the government grant patents to companies that research new drugs?

User Account

All Pages