Abstract
The speed of signal in a coaxial cable can be determined by measuring the time delay between varying lengths of coaxial cables that are wired from a signal generator to an oscilloscope. The oscilloscope will show the time delay between the signals passing through each cable. Through many trials of varying cable length differences, a plot of length difference versus time delay can be generated. The slope of the regression line, adjusted to be in ft/ns, represents the speed of signal in the cable. This speed was determined to be 0.69 +- 0.04 ft/ns. The speed is used to calculate the cable's relative electric permittivity, which was determined to be 2.2 +- 0.2.
