In opposition of the free-free tests, electrodynamic long stroke shakers are incorporated for the purpose of excitation. To achieve a decent response of the structure, slow-paced logarithmic sine upsweeps of .   5 and edgewise force input, respectively. The positions have been selected with respect to exploitation of the full force capacity of the shakers on the one hand, and their maximum peak-to-peak travel on the other hand. Shaker positioning is realised with the help of heavyweight support platforms (see Figure 2). A less powerful shaker with ±2.5 cm travel is applied edgewise at the height of 6 metres. Large orthogonal displacements occur at the driving point when the sweep signal passes eigenfrequencies of flapwise bending modes. This is the reason for customising the excitation signal so as to ramp down the force amplitude at these frequencies (cf. [13]). In-phase multi-point excitation has been carried out for flapwise excitation solely. In that case a second shaker of equal type is attached to the blade shell at the same length coordinate but shifted 0.9 m towards the trailing edge. Using Single Virtual Driving Point (SVDP) processing, **data** from correlated multi-point swept sine excitation is stored directly into single columns of frequency response functions (FRFs) [14]. These FRFs do not deviate from those generated in single-point excitation runs but they are related to a virtual force that acts on a virtual, physically non-existent driving point. The method of SVDP processing is stated on the concept of equivalent complex powers, either generated from two correlated shakers or the virtual force acting on the virtual driving point.