OSCILLOGRAPHS 



387 



I I 



I 



^«^l 



l\ ' 



r f, f.. 





2-60 CYCLE WAVE OF VARYING AMPLITUDE 

 FILM SPEED 3 INCHES PER SECOND 



l^«ft.B 



3- INTERRUPTED 60 CYCLE WAVE. 



FILM SPEED 4 INCHES PER SECOND 



4 - ENVELOPE OF VARYING 60 CYCLE WAVE 

 FILM SPEED 20 INCHES PER MINUTE 



5 - ENVELOPE OF WAVE . FILM SPEED 1-1/2 INCHES PER MINUTE. 



AAA/WMAAA 



6- RECORD SHOWING OPERATION OF SAMPLING DEVICE. 



A A A A A A (a'a^A AWtfOf '^^^(^A^' '' ' ' ' -f # 



e-WAVE. OF 60CYCLE AND 25 CYCLE COMPONENTS SUPERPOSED, 



Fig. 19 — Samples of continuous oscillograms. 



