Simulations of spectra generated in thin velocity shear layers having homogeneous turbulence with realistic wavenumber spectra and radial distribution were made with a 2D full-wave O-mode code. With a Doppler setup good localization of the velocity layer can be reached by changing the frequency at fixed oblique incidence. The poloidal velocity range existing in the shear layer is also accessed. Advantages and limitations of simulations are also discussed.