What is the purpose of using a time-domain reflectometer (TDR)?

The primary purpose of using a time-domain reflectometer (TDR) is to locate faults in cables. TDR technology works by sending a short pulse of electrical energy into the cable and measuring the reflections that occur when the pulse encounters changes in impedance, which can signify faults such as breaks, shorts, or other types of damage. By analyzing the time it takes for the reflections to return, technicians can pinpoint the location of the fault along the cable, making it an invaluable tool for troubleshooting and maintaining cabling infrastructure. This capability is essential in ensuring reliable communication and reducing downtime in networks.

The other choices focus on functions not associated with TDR. Amplifying signals is related to other devices like amplifiers rather than a TDR. Measuring resistance pertains more to multimeters or specific electrical testers rather than TDR technology. Increasing data speeds is influenced by various factors, including technology and infrastructure improvements, rather than the direct function of a TDR.