Correlator signal-to-noise characteristics

D.L. Hofmockel of the Bell Telephone Labs. has kindly pointed out to the author that in the article "Analysis of Correlator Signal-to-Noise Characteristics" by D. K. Cheng and B.R. Mayo, equation (18) does not agree under all conditions with the curves plotted in Fig. 4. Further checking shows that an error was introduced into (15) and thereby into (18) after they were used to compute the data for Fig. 4. Figure 4 is correct and the correct version of (18) is provided.