PROPERTIES OF SINE WA VE PLUS NOISE 



137 



0.38 



0.34 



0.28 



0.26 



0.18 



O.K 



0.14 



0.12 



0.10 



0.06 



0.02 



0.2 0.4 0.6 0.8 I.O 1.2 1.4 1,6 1.8 2.0 2.2 2.4 2 



Y3e'/C/37r) 

 Fig. 7 — Crossings of time derivative of phase angle. 



Ne' = expected number of times per second d$/dt increases through the valued' 

 and the power spectrum of /y are the same as in Fig. 5. 



6 2.8 



