Disclosed herein is a method of detecting relative vibration between an AUT and a probe during any type of near-field testing. The method also provides the means to measure and compensate for any data inaccuracies/errors created by relative vibration while requiring no additional hardware other than that normally utilized in conducting a near-field test. In contrast to the standard process of collecting data only at a series of discrete points, data is collected regularly as the probe moves with a constant velocity across its measurement plane or virtual surface. Due to the constant collection of data, each principle data point is accompanied by a series of leading and trailing secondary data points. While the principle data points are, as in a standard near-field test, transformed by a computer to determine the AUT's far-field pattern (or to identify malfunctioning antenna elements), analysis of the secondary data points reveals any relative vibration between the AUT and the probe. This method eliminates a source of test error and increases the confidence that an accurate test has been conducted. The vibration information provided by this method may be used to actively compensate (in analysis or hardware) for any principle data point position inaccuracy/error caused by the vibration.