An antenna measurement range and a method of calibrating same is proposed which at least substantially reduces the effects of echoing or multi path. The method of calibrating the range comprises the steps of: generating and radiating a training signal; receiving the radiated training signal and comparing the received signal with the expected signal; determining a set of equaliser coefficients to be used in these circumstances to eliminate or minimise the error between the expected training signal and the received signal; and storing the set of equalisation coefficients and associating them with the rotational or translational position of the antenna under test so that the coefficients can be applied to subsequent radiation pattern measurements. In one embodiment, the measurement nodes are dispersed in a three dimensional array about the antenna under test and a set of coefficients arrived at for each node to be applied to the subsequent radiation pattern measurements.
