I have a ADIS16288 on a Shaker Table at 25Hz @ 1G (peak per table Software), I have tried all three axis with the same result. The data coming back shows 25Hz but at only .4 Gs. Is the Data from the Sensor in RMS? Are there any other factors I may have missed? Do I have to multiply by 2 to make it a one sided spectrum? Settings are 80 Hz SR, 1G Gain (also tried 5G with same results), Manual FFT, Hanning Filter. If I reduce the Shaker Table to 1/2G the ADIS tracks pretty close to .2G so I assume its something in my interpretation. Any help would be appreciated... Thanks in advance...

Thank you for your post! To start with, RMS is probably an appropriate expectation for the result of a FFT, but that would lead us to an expectation of 0.7g. Would it be possible for you to provide a data capture (data would be fine) of the FFT and a Manual Time capture, at the same time? It would also be helpful to understand the sample rate and range setting associated with those files. With that, I can ask the design engineer to take a look at this (if I can't figure this out).