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The Jonard Industries TDR-100 is a network cable tester and time-domain reflectometer (TDR) designed for diagnosing and verifying network cabling installations. This instrument allows technicians to locate faults, measure cable length, and confirm continuity on network cable runs without requiring access to both ends of the cable. It is a compact, field-ready tool suited for low-voltage cable installation and maintenance work on structured wiring systems. Electricians, low-voltage technicians, and network installers rely on tools like the TDR-100 to reduce troubleshooting time on jobs involving Cat cable, coax, or other network media.
The TDR-100 is used in residential and commercial environments where network cabling is installed, extended, or serviced. Typical applications include verifying cable runs in new construction, locating breaks or shorts in existing cable plant, and confirming cable length before termination. The TDR function reflects a signal down the cable and measures the return to pinpoint faults by distance, making it useful in situations where pulling a new cable is not immediately practical. This tool is appropriate for structured cabling jobs, IT closet buildouts, and low-voltage retrofit work.
Designed as an OEM-style instrument for use with network cable installations typical of structured low-voltage wiring systems.
Installation and use of the TDR-100 is typically performed by licensed low-voltage technicians or qualified network cable installers. Before connecting to an active network port or powered equipment, confirm that all connected devices are powered down or disconnected to avoid signal interference or equipment damage. Follow local low-voltage wiring codes and any applicable NEC requirements for the work environment. Refer to the manufacturer documentation for cable velocity-of-propagation settings, which affect TDR distance accuracy.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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