New probe with large offset range and DC voltmeter for power integrity measurements

31-01-2017 | Rohde & Schwarz | Subs & Systems

The RT-ZPR20 is a new, extremely low-noise power rail probe with a bandwidth of 2GHz from Rohde and Schwarz. Its 1:1 attenuation also ensures very good sensitivity. The large offset range of ±60V permits analysis of the smallest disturbance signals during power integrity measurements, even on DC power supplies with a high voltage level. The probe also features an integrated high-precision DC voltmeter. The quality of the power supply is a key factor in the functionality and performance of sensitive electronic circuits. Disturbance signals on the DC power supply network can lead to EMC problems or impair the functioning of a circuit. This is particularly critical for IoT components with fast digital interfaces, as well as for fast memory chips and highly sensitive analog circuits. To assess the quality of the power supply for such components, the company is launching the RT-ZPR20 power rail probe. The device is designed for power integrity measurements in combination with the RTE and RTO2000 oscilloscopes from Rohde & Schwarz. The large 2GHz bandwidth ensures that even very broadband disturbance signals are captured. With its exceptionally low inherent noise and an attenuation factor of 1:1, the probe enables highly sensitive measurements. Users can measure and analyze in detail even small disturbance voltages using the many functions offered by their oscilloscopes, such as the powerful spectral analysis. Thanks to the dynamic range of ±850mV and unique large DC voltage offset range of ±60V, the scope of applications is very large. The device also features an integrated high-precision DC voltmeter that allows users to simultaneously measure a power supply's DC component, irrespective of the offset voltage. This reading and the signal voltage are transmitted to the oscilloscope and displayed. This allows the DC level and ripple to be measured in parallel when qualifying power supplies for highly sensitive electronic components such as CPUs and FPGAs. Users see at a glance whether the ripple voltages lie within the often very tight power supply tolerances.

By Craig Dyball