I think we're talking about the maximum slope of the big spike and how it can immitate that of higher frequencies, even though the spike occurs every second or so. It may be a sharp spike an not sinusoidal in nature. On Sunday, March 6, 2011, N. T. wrote: > Peter Feucht wrote: >> >> I know. >> > .... >> Max. frequency under stress conditions can be assumed with 210/Minute = =3D >> about 3,5Hz. >> >> All this for humans. >> > > Max. frequency under medicine can be higher, even without stress > conditions, I know. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .