12 



THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1951 



izer. The anticipated shape of this characteristic, shown in Fig. 5(b), is 

 based on 19-gauge cable and the deviations among the first 46 factory made 



95.0 

 94.5 



CO 



|94.0 



^93.5 



2 



Z93.0 



< 



92.5 



92.0 

 88.5 



88.0 



87.5 

 <o 



I 87.0 

 O 



UJ 



^86.5 



85.5 



85.0 

 84.5 



3 4 5 6 7 8 9 



CHANNEL NUMBER 



10 11 i: 



10 



<o 6 



S! 6 



feS4 



2 2 



CHANNEL NUMBER 

 12 11109 8 7 654 32 1 



40 50 60 70 80 90 100 110 120 130 140 150 

 FREQUENCY IN KILOCYCLES PER SECOND 



Fig. 5(a) — Repeater gain and cable loss characteristic. 



(b) — Loss-frequency characteristic of deviation equalizer. 



repeaters. More accurate determinations can be made by measurement of 

 early systems in the field. 



