Two new TDRs, the T3SP10D (10 GHz) and T3SP15D (15 GHz), combine portability, reliability, and functionality at a cost-effective price point. Until now, portable tools were either much costlier high-end TDRs or single-ended instruments with limited functionality. The single-ended approach, which characterizes a device under test (DUT) with a mathematical calculation of frequency and time-domain qualities, is not accurate enough to meet today’s need to understand and control impedances from end to end in the channel. 
Furthermore, modern serial-data standards such as Ethernet and USB require measurement of impedance matching in the frequency domain using S parameters (S11), which would require the use of an unwieldy vector network analyzer.
Teledyne LeCroy’s T3SP10D (10 GHz) and T3SP15D (15 GHz) TDRs stimulate the DUT with true differential and common-mode signals. This enables designers of high-speed data channels, test engineers, and field technicians to precisely locate impedance discontinuities that can degrade a data signal’s rise times, pulse width, timing, jitter and noise content, harming overall system reliability and functionality.
Using the same open short load (OSL) calibration standards as vector network analyzers, Teledyne LeCroy’s TDRs reach high levels of impedance plot accuracy.
With a small form factor, lightweight and optional internal batteries, the instruments can go anywhere in test labs or in the field to measure impedance discontinuities in applications such as ECUs, Automotive Ethernet, and cable testing, and in industries including automotive, aerospace/defense, IC manufacturing, and telecom. They can also precisely identify and diagnose signal-integrity issues in interconnects, transmission lines, serial-data channels, and cables.
The TDRs offer fast rise times of 50 psec (T3SP10D) and 35 psec (T3SP15D) for fault resolution (in FR4) of 4.2 mm and 3 mm, respectively, at DUT lengths of up to 40 m. TDR repetition rates of up to 10 MHz rival that of costlier TDRs. The instruments also come equipped with an ESD protection module based on high-performance coaxial RF switches that protect TDR RF-signal detectors from the input connector when the instrument is not in use, a feature highly valued by users for its potential extension of the instruments’ life span.
The Teledyne Test Tools T3SP10D and T3SP15D TDRs are available now at prices starting at $19,780. Options include internal battery, storage/travel case, phase-matched cables, differential probes, calibration kits, and on-site training. For further information, contact Teledyne LeCroy at 1-800-553-2769 or visit teledynelecroy.com.
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