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What is a TDR?

From AEMC Instruments
 

 
A TDR (Time Domain Reflector) is used for cable length measurement and fault locating on virtually all types of cable including twisted pair, coaxial and parallel conductors. Access to two conductors from one end is required. The TDR transmits pulses of a known shape and amplitude into one end of a cable that travel along the cable at a speed determined by its Velocity of Propagation. Vp is a ratio of the speed of light.
Product Announcements
HDW Electronics Inc. - Miniflex TDR Cable Radar
The Miniflex is a professional Time Domain Reflectometer and Audio Tone Generator designed to detect and locate faults on power cables and metallic communication cables. (read more)
HDW Electronics Inc. - Arc Reflection Filter
Upgrade your Thumper to Arc Reflection! The model M219 Arc Reflection Filter converts most thumpers into an efficient fault prelocating system, when used in conjunction with a TDR in the Arc... (read more)
Fotronic Corporation / Test Equipment Depot - Test-Um NT950 Validator LAN / Cabling Certifier
The NT-950 Validator Network / Cabling Certifier measures and presents fast and clear SPEED and PERFORMANCE results up to 1 gigabit. Speed certification assures the cabling will do the job it is rated... (read more)
KROHNE, Inc. - OPTIFLEX 1300 with Smaller Process Connections
OPTIFLEX TDR Now available with 1/2 NPT process connection Ideal level and interface detection solution for totes and small vessels... (read more)
Methode Electronics, Inc. - RJ45 Pluggable Transceiver Module
The RJ45 pluggable transceiver module is a high performance integrated duplex data link for bi-directional communication over CAT 5 unshielded twisted pair copper cable. It is compliant with the MSA... (read more)
HDW Electronics Inc. - Digiflex Com TDR Cable Radar
The Digiflex Com is a TDR (Time Domain Reflectometer), which works as well on secondary cables as on primary or communication cables. (read more)
HDW Electronics Inc. - Trouble Shooting Underground Power Cable Faults
EZ-RESTORE There is a strong trend within the utility industry to make trouble shooting of underground power cable faults less time consuming, shorten restoration times in order to achieve a more... (read more)
Wilcoxon Research - Cables
In addition to sensor construction and connector choices, the type of cable and cable material must be carefully chosen to ensure proper operation. The two types of cables most commonly used to... (read more)
Magnetic Shield Corporation - Cable & Conduit
Substantially reduces magnetic field pickup and radiation compared with conventional twisted pair cable. (read more)
 
Topics of Interest
Distance To Fault (DTF) is a performance verification and failure analysis tool used for antenna and transmission line service and maintenance. It uses the Frequency Domain Reflectometry (FDR)... (Read More)
Guided Reflex Microwave (or radar) is based on the TDR principle (Time Domain Reflectometry), which is has been traditionally used in the continuity measurement of communication cables. Extremely... (Read More)
R. J. Collier 1.1 Introduction The aim of this chapter is to revise the basic principles of transmission lines in preparation for many of the chapters that follow in this book. Obviously one... (Read More)
Absorption: The portion of optical attenuation in an optical fiber resulting from the conversion of optical power to heat; caused by impurities such as hydroxyl ions in the fiber. A/B Switch: A... (Read More)
In the text we look at the way data is represented (a set of patterns referred to as “1” or “0”) generally in a set of these patterns called an octet or a byte (or sometimes a... (Read More)