IX-BAXI) SI.\(;LK-FRF,QTEXrY SIGXALIXG 



1329 



several sr units, and the pulses will tluMcfoic he brought close to (K) 

 milliseconds by the successive corrections. 



The action of the pulse corrector when the iiiconiiii<; signal is too long 

 will be explained with the help of Fig. 13. Here the cycle of events will 

 be assumed to start at (a), just at the end of an incoming dial pulse. 

 From (a) to (b) current will flow into the grid of the dc amplifier b, at 

 (b) the RF relay will release, and the A'oltage will start to decay, all ac- 

 tions so far being the same as in Fig. 12. In this instance, however, a new 

 pulse would come along before the k relay has had a chance to release, 

 and unless something is done about it, it would not release at all. 



70 

 65 

 60 

 55 

 50 

 45 



^40 

 O 



< 



u 

 a:65 



CD 



1- 

 Z 60 



LU 



o 

 CL 55 



UJ 

 CL 



50 



45 

 70 



65 



60 



55 

 50 



35 40 45 50 55 60 65 70 75 80 65 90 

 PER CENT BREAK IN 



Fig. 14 — Per cent break input versus output churacteristics for (a) 9 pulses 

 per second, (b) 10 pulses per second, and (c) 12 pulses per second. 



