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BELL SYSTEM TECHNICAL JOURNAL 



F„ = for n > S. Therefore, the values of F„ may be determined 

 from the following equations wherein the values of nb are in degrees. 



Solving these simultaneous equations it is found that Yi = .967, 

 Fo = .865, Fs = .685, F4 = .408. 



The computed admittance is the same as that which may be com- 

 puted from the information given in Appendix III of a previous 

 paper ^ which is : 



F = transfer admittance at frequency /, 

 fs = dotting speed. 



Since the bias of the signals at the circuit output must equal the bias 

 of the signals at the circuit input for the magnitudes of bias entering 



-100 -80 -60 -40 -20 +20 +40 +60 +80 +100 



Fig. 28 — Bias in-bias out characteristic for transmission of telegraph signals 

 formed in accordance with Fig. 26 over a system having a band width equal to the 

 dotting speed. 



into the determination of the admittance, and since the transmission of 

 additional harmonics of the fundamental frequency would be required 

 to make the input bias equal to the output bias at additional magni- 



