Seconded. However, if you want to get the time then wouldn't you need to multiply that by 2 * the length of the line to get the round-trip time?it depends on the length of the line and the phase velocity of the wave. by L and C, I assume you are referring to the per unit length inductance and capacitance of your transmission line. the phase velocity would then be (assuming a TEM wave): 1/sqrt(LC)
It is the square root. Here is some good reading: http://literature.agilent.com/litweb/pdf/5988-6505EN.pdfHow do you compute the time required for a reflected wave to travel FROM the load? Do you take the square root of LC or do you take LC times 2?
Thank you for your assistance!
And the velocity factor of the cable is calculated:The speed of a signal travelling through a cable equals the Speed-of-light * Velocity Factor of the cable.
The Velocity factor depends on the dielectric used and is 1.0 for air spaced cable going down to 0.6 for solid polythene. Typically, semi air-spaced or foamed dielecetric (the two most common ones) have a VR of about 0.8 to 0.85