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BELL SYSTEM TECIIXICAL JOURNAL 



making use of a method which is discussed in Appendix C, the fre- 

 quency components of the three waves illustrated in Fig. 1 have been 

 computed and are shown in Fig. 2. The frequency marked 12 T 

 in the drawing cciuals the line speed. T in this connection has the 

 same \alue as in Fig. 1. The letters in this figure refer to the corre- 



A — Frequency Coinponciits of a .Single Dot, Kectangiilar Wave 

 B — F'requency Components of a Single Half Cycle of a Sine Wave 

 C — Frequency Components of a Single Dot, Rectangular Wave Passed through 

 Network Shown in I"ig. 1 



sponding waxes in Fig. 1, .1 iicing the (■(iinpniiciits of an isolated 

 rectangular wa\"e, B the corresponding components for the half-cycle 

 sine wa\e, and C those for the rectangular wave after it has been 

 transmitted through the network D in l-"ig. 1. It is seen from Fig. 2 

 that the rectangular wa\e form A contains the greatest amount of 

 currents of higher fretiucncies and is, therefore, the poorest from 

 the standpoint of interference. The half-cycle sine wave contains 

 less of these higher frecjuencies altliough, as will be seen, the high- 

 frequency components are far from negligible. The wave C is the 



