Time Domain Reflectometer (TDR)

This circuit is from Tomi Engdahl's page. It describes a nifty little TDR that, when combined with a regular oscilloscope, can be used to find discontinuities on long runs of cables.

• Time Domain Refectometer Article

More information
Good sites to look for further information how to use a TDR:

• Measuring Parasitic Capacitance and Inductance Using TDR
• TDR - Time Domain Reflectometry Analysis
• TDR Tutorial
• TDR Waveform Analysis
• The ABC's OF TDR'S