3-23At the generator:Rise from-100 V to -70 VAt point W:Drop from0 V to -70 VAt point X:Drop from+100 V to +70 VAt point Y:Rise from0 V to + 70 VFigure 3-22.—Instantaneous voltages along a transmission line.A plot of these new voltages produces the solid curve shown in figure 3-22, view B. For reference,the curve from T7 is drawn as a dotted line. The solid curve has exactly the same shape as the dottedcurve, but has moved to the right by the distance X. Another plot at T9 would show a new curve similarto the one at T8, but moved to the right by the distance Y.By analyzing the points along the graph just discussed, you should be able to see that the actionsassociated with voltage changes along an rf line are as follows:1.All instantaneous voltages of the sine wave produced by the generator travel down the line in theorder they are produced.2.At any point, a sine wave can be obtained if all the instantaneous voltages passing the point areplotted. An oscilloscope can be used to plot these values of instantaneous voltages against time.

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