on a TDR plot..

[TecHNooB]

on TDR plots... slight bumps (not noise) in the voltage indicate an inductance or capacitance that's not similar to the characteristic capacitance/inductance in the vicinity.

apparently, you can calculate the value of the series inductance or shunt capacitance by integrating Z(t) or 1 / Z(t) over the half the bump.. what the hell is this

I don't believe it's another way of writing the standard definitions for L or C.

 

[Aluvus]

Z is impedance.

http://en.wikipedia.org/wiki/Electrical_impedance
http://en.wikipedia.org/wiki/Characteristic_impedance

 

[TecHNooB]

Z is impedance.

http://en.wikipedia.org/wiki/Electrical_impedance
http://en.wikipedia.org/wiki/Characteristic_impedance

can you explain why you would integrate impedance?

 

[artikk]

can you explain why you would integrate impedance?

This, I think, goes to the basics of transmission line theory. Transmission lines, depending on the operating frequency and length of the line(close to wavelength/4), could be represented by a long of chain of resistances and shunt cap/inductances.