Dear Greg,
>>Do you mean 0.1 Hz line width, or 0.1 Hz resolution?
This is how I understand IN GENERAL: resolution is totally instrument related - perhaps when data are obtained the resolution is at best is 1/Fs where Fs is the sampling frequency.
Next, one uses these data and created a...
The application:
We have here a number of synchrotron radiation equipments (long beam-pipes, vacuum boxes with water cooling, optical tables, etc.) All of these equipments are to capture X-ray
radiation coming from the synchrotron. Of course everything
everything is coupled together and...
electricpete thank you for your response.
On data crunching:
My ADC will provide an acceleration vs. time stream.
As I understand the data crunching is the calculation
that converts this into the frequency domain (using FFT)
a(f) = FFT[a(t)],
so then I can recalculate the a(f) into...
The first Q:
I have an 500kHz ADC, 16 bits, what is the optimal
sampling rate and sample length to measure vibration displacement spectra in the sub Hz- to kHz range?
I am measuring ground and floor vibration using piezoelectric accelerometer.
And the second:
Can anyone point me to a source of...
>1) Divide the data into frames, say 1024 points/frame.
>2) Fourier Transform (FT) the data.
>3) Square the FT for each frame.
>4) Average the squares from all the frames (for each freq).
>5) Divide that number by the frequency resolution (sample rate/frame length).
Dear Bob,
This is what...
I have a acceleration vs. time and the calculated
acceleration vs. frequency and the displacement vs. frequency dependence.
How do I get the PSD (micron^2/Hz) vs. frequency from any of these data?
Is it correct to take the displacement vs Hz, square it and divide it by the Hz?
Needless to say...
