Use the DS-3000 to calculate and display the gravity acceleration after converting the “speed” which is measured by the Laser Doppler Vibrometer to “acceleration” by the first order differentiation.
In the following figure, the gravity acceleration is displayed in the third line from the top with the three-screen display.

Obtain the power spectrum of the gravity acceleration by calculating the second graph from the top (power spectrum of the speed). Select the third graph from the top to display the result. Use the mathematical calculation function to operate first order differentiation and calculation. Set the unit to "G"after the calculation.

The third graph from the top shows the power spectrum of the gravity acceleration.

The power spectrum is the value which has square phase dimension of some physical quantity (acceleration, speed or displacement etc). To operate unit conversion of this value, it is necessary to use the square value of the converted value. Specifically, to convert the unit from m/s² to G, it is necessary to divide it by (9.8)2.