R&S RT-ZISO isolated probe from Rohde & Schwarz.

Rohde & Schwarz offers the R&S RT-ZISO isolated probe

  • Rohde & Schwarz has developed the isolated probe of the R&S RT-ZISO series, which is particularly suitable for making measurements on fast switching signals, especially in environments with high common-mode voltages and currents.
  • The German manufacturer also offers the R&S RT-ZPMMCX passive probe, featuring an MMCX connector.
  • The isolated probe in the R&S RT-ZISO range is particularly well-suited to measurements that are indispensable when designing power systems using wide-bandgap semiconductors (SiC and GaN).

The R&S RT-ZISO provides differential measurements of up to ±3 kV on reference voltages of ±60 kV with a rise time of < 450 ps and suppresses fast common-mode signals that can distort and interfere with accurate measurements. According to Rohde & Schwarz, its power-over-fiber architecture galvanically isolates the device under test (DUT) from the measurement setup, providing a much higher common-mode rejection ratio (CMRR) than conventional differential probes. Its key features include bandwidth options of 100 MHz to 1 GHz (upgradeable), a CMRR of > 90 dB (> 30 000:1) at 1 GHz, an input and offset range of ±3 kV, a common mode range of ±60 kV, and a sensitive input range of ±10 mV.

The R&S RT-ZISO isolated probe can be used with the oscilloscopes of the next generation MXO series (MXO 4, MXO 5, MXO 5C) and with the R&S RTO6.

The R&S RT-ZISO is ideal for a range of applications, including switching analysis of power converters with WBG materials, double-pulse testing, floating measurements, shunt measurements, inverter design, and motor drive analysis.

The isolated probing system comes with a range of probe tips for different measurement needs, including the micro-miniature coaxial (MMCX) connector, square pins, wide square pins and the isolated passive prober. All connectors are rated for CAT III voltages up to 1000 V.

Passive probe with MMCX connector

Along with the R&S RT-ZISO, Rohde & Schwarz is also presenting a new type of passive probe with MMCX connector. The R&S RT-ZPMMCX supports a bandwidth range of > 700 MHz with input voltages of ±60 V DC and 30 V (RMS), making it the ideal complement to the R&S RT-ZISO isolated probing system for low-side gate measurements. The MMCX probe has a very low capacitive load of < 4 pF, which helps to maintain the best signal integrity for preserving the switching waveform shape and timing.