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A time-domain reflectometer (TDR) is a measurement tool used to measure the impedance profile of a component (device) under test (DUT). The concept is straightforward. Using a step generator and an oscilloscope, a fast pulse edge is launched into the DUT.
A Time Domain Reflectometer is set up as shown in Figure 3. The step generator produces a positive going incident wave which is fed into the transmission system under test. The oscilloscope’s high imped- ance input bridges the transmission system at its junction with the step generator. The step travels
Today’s Time Domain Reflectometers provide digital design engineers with powerful tools that not only display traditional impedance measurements, but they also provide ease-of-use that generate S-parameter measurements that may be used for de-embedding purposes.
Patton Electronics provides a Microsoft Excel worksheet, SHDSL_TDR_Worksheet.xlsx, to help analyze the results of the “test time-domain-reflectometry” command. See section 4 of this document for an example of how to use the worksheet.
This paper compares vector-network-analyzer- and oscilloscope-based time-domain reflectometers and their recent advances.
30 sty 2015 · designers prefer working in the time domain with logic analyzers and high-speed oscilloscopes. When compared to other measurement techniques, time domain reflectometry provides a more intuitive and direct look at the DUT’s characteristics.
5 wrz 2023 · 5.0 TIME-DOMAIN REFLECTOMETRY (TDR) 5.1 Test Scope A time-domain reflectometer locates and characterizes changes in impedance in a cable system. These changes can be caused by: faults (shorts) joints (splices) open connections taps in the cable system deteriorated neutrals
