SENSITIVITY MEASUREMENTS OF RECEIVERS FOR PULSED SIGNALS,

It is recommended that, whereever possible with linear tube type receivers, the EDL 4-db meter measurement be made. The resulting repeatability will allow the accurate detection of day-to-day sensitivity variations of a receiver. Also, performance in the field can be accurately com pared with previous performance, wher operators, during development or test and inte gration. In cases where the lack of time or suitable equipment precludes use of the EDL 4-db meter measurement, the S NN 2 measure ment with minimum variation between operators. For measurements with receivers using transistor or logarithmic IF amplifiers and for all propo sals and acceptance tests, the tangential sensi tivity measurement should be made. Although there may be somewhat less repeatability between various operators, there will be more consistent results with transistor and logarithmic IF amplifiers and we will be more consistent when comparing receivers in various systems. Author