time-domain reflectometer


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time-domain reflectometer

[′tīm də¦mān ‚rē‚flek′täm·əd·ər]
(electronics)
An instrument that measures the electrical characteristics of wideband transmission systems, subassemblies, components, and lines by feeding in a voltage step and displaying the superimposed reflected signals on an oscilloscope equipped with a suitable time-base sweep. Abbreviated TDR.
References in periodicals archive ?
The application of a time-domain reflectometer to the problem was only going to expose shorts and opens.
The enhancements include optical protection switching (OPSM); a colourless, flexible grid add/drop (CAD8/8E); optical time-domain reflectometer (OTDR); an in-line amplifier (ILA); optical power monitoring (OCM); and capabilities that leverage 75GHz grid filters to support high-baud-rate wavelengths up to 64QAM 600 gigabits per second, with up to 64 wavelengths per filter enabling scalability to 38.4 terabits per second per fibre pair.
Yokogawa is adding an entry-level model, the AQ1000, to its range of OTDR (optical time-domain reflectometer) test instruments.
*Upon completion of the fiber optic installation, the selected vendor must test all single mode fiber at 1310nm and 1550nm wavelengths with an Anristu CMA-4500 Optical Time-Domain Reflectometer
Personick, "Photon probe--an optical fiber time-domain reflectometer", Bell System, Technical Journal, vol.
Stansbury added that while many of the technical schools and community colleges teach new technology, they don't offer training about older, existing copper lines or customer line troubleshooting without the use of a time-domain reflectometer. That's something TEEX offers to ensure its training is comprehensive.
Mohr and Associates, Richland, Wash., has launched software upgrades for their CT100 Series Time-Domain Reflectometer (TDR) cable testers and bundled CT Viewer(TM) TDR analysis software that add real-time Internet streaming and remote control for leverage of remote engineering expertise.
The TDR 100 is a time-domain reflectometer for measuring volumetric water content and bulk electrical conductivity in soil and other porous media.
Glossary ATM asynchronous transfer mode ELFEXT equal level far-end crosstalk FEXT far-end crosstalk ISDN integrated services digital network ISO International Organization for Standardization LAN local area network NEXT near-end crosstalk OSI open systems interconnection OTDR optical time domain reflectometer POTS plain old telephone service PSELFEXT power sum equal level far-end crosstalk PSNEXT power sum near-end crosstalk TDR time-domain reflectometer TIA Telecommunications Industry Association UTP unshielded twisted pair WAN wide area network
This (Army Engineer Waterways Experiment Station) report concerns the development, construction, and testing of a rugged self-calibrating time-domain reflectometer (TDR) instrument for monitoring groundwater elevations.

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