Checking Speed of EM Waves in Coaxial Lines with Pulse Function

AI Thread Summary
Using a pulse function in a function generator is preferred for measuring the speed of electromagnetic waves in coaxial lines due to the clarity of its sharp edges. Unlike sawtooth functions, which have slanted edges, pulse functions allow for precise timing comparisons since their edges occur at an exact moment. This eliminates ambiguity in determining which part of the signal to compare, enhancing measurement accuracy. The assumption of an ideal pulse without dispersion further supports this method. Overall, pulse functions provide a more reliable means of assessing wave speed in coaxial lines.
newton1
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why we should use the pulse function in function generator when we need to check the speed of electromagnetic wave in coaxial line ??
why we can't use the other like sawtooth function??
 
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It is easier to compare the edges of pulse functions than to compare slanted edges. Assuming an ideal pulse, and no dispersion, the edges of the pulses will occur entirely at an exact instant in time. Using a signal with slanted edges, you would have to determine what part of the edge of the transmitted signal to compare to what part of the edge of the received signal.
 

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