TDR CONTRACTORS, INC
twisted pair wire or coaxial cable ) · [ · 1 ] · and to locate discontinuities in a connector · printed circuit board · if there are impedance variations · duration and shape of the reflected waveform · a step signal is observed on the display · = R L − · the reflections will have the same shape as the incident signal · then the reflection will have the same sign as the incident signal · if there is a step decrease in impedance · a TDR may be used to verify cable impedance characteristics · splice and connector locations and associated losses · 2 ] · For longer cables · the instrument is concerned with the rising edge · which can be very fast. [ · 3 ] · A 1970s technology TDR used steps with a rise time of 25 
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91; 1 ] and to locate discontinuities in a connector, printed circuit board , or any other electrical path. Description [ edit ] A TDR measures reflections along a conductor. In order to measure those reflections, the TDR will transmit an incident signal onto the conductor and listen for its reflections . If the conductor is of a uniform impedance and is properly terminated , then there will be no reflections and the remaining incident signal will be absorbed at the far-end by the terminatio
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