10,000 



5000 



1000 



500 



EXPERIMENTAL CURVE ■ 



-THEORETICAL CURVE 



100 



150 



300 600 1200 



CUTOFF FREQUENCY (C/S) 



2400 



4800 



Figure Bl . Illustration of the number of times that 

 random noise goes into an interval about x = for a PD 

 of 0.4, vs. the cutoff frequency of low-pass filter. 



REVERSE SIDE BLANK 



45 



