A METHOD FOR SHORT TIME MEASUREMENT WITH ANY ADJUSTABLE TIME SPAN AND HIGH MEASURING ACCURACY
Werner Kroebel · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1958
A method of short time measurements is described. It has a wide field of application, but for the present it is restricted to periodic events which can be triggered. An extension to non-periodic events seems to be possible, from a main-frequency source pulses are derived as standard time marks; there are two or more channels for dividing this frequency, delivering trains of low-frequency pulses, whose space from the standard pulses can be varied by means of goniometers. These pulses can be distinguished as far as the interval is smaller than the period of the low-frequency pulses. This method allows time measurements --espscially in oscillographic devices --in the range from nanoseconds to seconds with an accuracy depending only on the period of the main- frequency. The accuracy is independent of the absolute space and can be made srnaller than 10/sup -10/ seconds by suitable choice of the main-frequency. (auth)