R&S’ scope probe eases millivolt-range measurements

November 07, 2016 // By Graham Prophet
The R&S RT-ZP1X passive 1:1 probe from Rohde & Schwarz broadens the application range of its R&S RTO and R&S RTE series oscilloscopes. Both the probe and the oscilloscopes' front end are extremely low noise, enabling the combination to measure signals down to 1 mV/div, e.g. for power integrity measurements on integrated circuits and components.

Supply voltage requirements have risen significantly and power integrity measurements havebecome indispensable; verifying noise characteristics of components requires measuring signals in the millivolt range. An appropriately sensitive, low-noise probe is essential for obtaining meaningful measurement results.


The new R&S RT-ZP1X passive 1:1 probe is precisely matched to the R&S RTE (up to 2 GHz) and the R&S RTO1000/2000 (up to 4 GHz) oscilloscopes. In combination with the R&S RTE, this solution claims the best price/performance ratio available for power integrity measurements. The oscilloscopes' low-noise front end keeps the noise floor under 650 µVpp (1 mV/div and 200 MHz bandwidth), even for a 1 MΩ input impedance. Other oscilloscopes, R&S asserts, achieve such values only for a 50Ω input impedance.


With an acquisition rate of up to 1 million waveforms per second, users quickly obtain meaningful measurement results, complete with histogram and all signal components. In the zoom view in 16 bit high definition (HD) mode, the smallest of signal details can be analyzed and triggered.


To search for coupled interference signals, the oscilloscopes offer a hardware-based fast Fourier transform (FFT) that delivers the spectrum display practically in realtime. This makes it possible, for example, to identify 10 MHz signals coupled to an adjacent clock line at a glance. Another unique feature is the zone trigger that can be used to graphically separate events such as out-of-limit conditions in the time and frequency domain.


The probe is also suitable for the R&S RTM (up to 1 GHz) and R&S HMO (70 MHz to 500 MHz) oscilloscopes.


Rohde & Schwarz; www.rohde-schwarz.com/ad/press/probesportfolio