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bennettdan
07-15-2006, 08:42 AM
Hello,
·· I am asking if anyone can clear something up for me. How to convert time small us time mesurements to frequency?
Like 512 us pulse what would the frequency be? Also how to figure it?
Thanks

PJ Allen
07-15-2006, 08:57 AM
t = 1 / f··· f = 1 / t

The time of a waveform = 1 / freq (Hz), while the frequency of a waveform is 1 / time (sec).

However, you cannot derive a frequency based solely upon a pulse-width (like getting PULSIN.)·

If a pulse train has a period (pulse-to-pulse), repetition rate ("rep rate")·of 512 usec, its freq·is =·1 / 0.000512, = 1953 Hz.

Post Edit -- in the attached drawing, both waveforms have different pulse-widths (and would·yield different results for a PULSIN), but they have the same period ("rep rate"), they are the same frequency.

Post Edited (PJ Allen) : 7/15/2006 1:10:13 AM GMT

bennettdan
07-15-2006, 05:05 PM
Yes,
I see what you are saying, so 1 us is 1/1000 of a ms then right ?

PJ Allen
07-15-2006, 09:53 PM
True.

bennettdan
07-15-2006, 10:00 PM
Thanks for the help PJ Allen