Chance B., Hulsizer R.I., MacNichol E.F., Williams F.C. (ed.) Electronic Time Measurements

New York: McGraw-Hill, 1949. — 538 p. — (MIT Radiation Laboratory Series. Volume 20)The object of this book is to present the method of approach to the problems of time and distance measurement by manual and automatic means, and the practical circuits employed for these purposes. In addition, important techniques of pulse data transmission and pulse-amplitude cancellation methods are included. The accurate measurement of short time intervals is not a new subject since many experiments have been devoted to the accurate determination of the velocity of light. The simplification and increased precision possible through the use of circuit techniques of Vol. 19 of the Series have led to time-measurement techniques that have resulted in practical and accurate radar distancefinding and data-transmitting systems. Since the characteristics of these circuits depend upon those of the radar system, the book is introduced by a survey of techniques for radio distance and speed measure ment. The material then continues with a survey of basic techniques and methods in pulse time measurement, including the generation of fixed and movable timing markers and their applications to manual and automatic time measurements. The use of these techniques for precision data transmission and for the relaying of the radar PPI to remote points is next presented, and the book concludes with a discussion of the use of supersonic delay devices for the cancellation of recurrent waveforms.