Into the design and verification framework of a S/C, a fundamental milestone is provided by the qualification and acceptance tests during which the capability of the platform to withstand the mechanical environment, reproduced by proper devices with suitable load values, is observed. Focusing on sinusoidal vibration tests, also called sine sweep, the aim is to impose low frequency loads on three axes, between 5÷100 Hz, through a shaker placed at the base of the S/C. Mechanical proper interfaces connect the slip table to the S/C. Typically, the curves acquired during the test are different with respect to the ones predicted in the classical numerical sine test prediction.