Hi

I am not that familiar with vibration sensitivity, but I am trying to make sense of this graph that is given in the datasheet for the HMC-C200 DRO:

Can somebody please explain to me what this means? If the y-axis units were /G it would have made sense to me. As far as I know, /G is the usual unit for vibration sensitivity, and then I could calculate the phase noise of the device under specific vibration conditions. The unit g2/Hz used in this graph usually refers to power spectral density of vibration, but then the graph does not make any sense to me.

Any help would be appreciated, thanks.