AMPLITUDE RANGE CONTROL 



533 



60 70 80 90 



per cent of time emf is equal to or less than emf shown 

 (positive values) 



Fig. 9 — The amplitude ranges of tlie compressed waves of Fig. 8 are shown, 

 together with those of Fig. 5. The amount of signal modification (and noise im- 

 provement) for any amplitude below maximum may be correlated readily with the 

 time constant. 



