Polarization dispersion is one of the effect which can give rise to data rate limitation. An actual optical link can be installed using different appended fibres, manufactured by different producers, processing techniques or batches. Knowing the polarization dispersion of each individual fibre, it could be difficult to forecast the overall dispersion of such an heterogeneous link. Fortunately recent models make the prediction of the global polarization dispersion possible. An experimental verification of this model using two different methods is reported, so that the predicted dispersion of two appended non-similar fibres could be compared with actual measurements.