The turbulence induced by a current drawn in a low‐density argon plasma is investigated by microwave scattering and correlation techniques. The azimuthal 30‐GHz scattering system uses a newly designed variable waveguide in order to detect the scattered signal at any angle between 0° and 90°. Both diagnostic methods show that the turbulence is dominated by low‐frequency waves propagating perpendicular with respect to the current. A comparison of these two important diagnostic methods for turbulent plasma is presented.