A new method for measuring the autocorrelation function of stationary, Gaussian distributed, differentiable or nondifferentiable noise is presented. This method does not require real‐time digitizing or analog multiplying and can be easily realized since it is based on the use of either a sampling oscilloscope or a boxcar averager. The method requires the measurement of the ensemble average of the multiple traces generated by internally triggering the oscilloscope or averager on the noise. Expressions for interpreting this average to obtain the autocorrelation function as well as examples of measurements made by this technique are given and discussed.