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## Main Question or Discussion Point

I am currently doing a vibration analysis using a

Before I ran the test on my specimen, I tried to characterise the vibration using a DDSR board (accelerometer). Interestingly, the

Anyone knows why?

__random vibration machine__which gives**Grms**value based on*Power Spectral Density*(PSD) plot using*Fast Fourier transform*(FFT).Before I ran the test on my specimen, I tried to characterise the vibration using a DDSR board (accelerometer). Interestingly, the

**G-force**recorded from the accelerometer far exceeds the values i've set on the random vibration machine.Anyone knows why?