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USB Based Time Domain Reflectometer

AA FRA09 April 2019 - Analog Arts launched the fully automated high resolution TDR XT995. With a resolution of 0.5 mm, and a sampling rate of 100 GHz, XT995 is a unique TDR cable analyzer which includes a powerful integrated FRA. It is designed for various cables with lengths of 50 cm to more than 10 m with higher length (up to 3000 km) optional. This model enables the user to automatically test various types of cables for kink, cramp, impedance discontinuity, short and open.

An intuitive window plots the TDR signal and its corresponding slope. These signals are then analyzed, based on the test parameters set by the user, to pass or fail the cable under test. It automatically tests for shorts, measures cable’s length, impedance, resistance, capacitance, inductance, as well as the transmission loss through the cable. The measurement results are then displayed both for the entire length of the cable, and also for the unit length; available in feet or meters.

The TDR acquisition bandwidth is around 1 GHz, and the stimulating step signal rise time is less than 1 nS. This allows for the precise measurements of cable parameters. For velocity factors different from the default value of 0.67, the user can enter the proper value in a corresponding text box to compensate for any related errors. Once one end of the cable is connected to CH2, the measuring process takes place and is displayed on the screen, both numerically and graphically. All the measurements are done automatically by setting the time base of the TDR analyzer and the frequency of the applied step signal to make it appropriate for the length of the cable.

To view the general behavior of the cable, the time-base of the unit can be changed to see a bigger span of the reflected wave. Clicking the auto button will make the process automatic again. After the length of the cable is determined, connecting the open end of the cable to CH1 allows for the automatic measurement of the capacitance, inductance, resistance, and signal loss through the-cable. CH1 input of the instrument is a full featured 1 GHz bandwidth oscilloscope and spectrum analyzer to analyze live cables. Similarly, the integrated generator can also be used as a full featured 50 MHz arbitrary signal generator for cable excitation. To examine some of the features of the product, install the demo application-software and review the comprehensive video tutorials.

www.analogarts.com/



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