Hall-sensor probe enables multi-channel current measurements on R&S scopes

March 02, 2015 // By Graham Prophet
Rohde & Schwarz’ R&S RT-ZC20B oscilloscope accessory current probe is compatible with the Rohde & Schwarz probe interface; R&S RTO, R&S RTE and R&S RTM oscilloscopes automatically detect up to four current probes connected in parallel.

The instruments also automatically adjust vertical scaling and zeroing settings, and a degaussing function is activated directly on the instrument. The current probe receives power over the R&S probe interface, eliminating the need for an external power supply. They provide non-contact, isolated current measurements. At 100 MHz bandwidth, the R&S RT-ZC20B can measure AC and DC to a maximum 30 Arms/50 Apeak current with a resolution of 10 mA and with low noise. Combined with the oscilloscopes’ 16 bit high definition option, currents of less than 1 mA can also be measured. This suits the current probe for numerous power electronics applications, especially for evaluating switched-mode power supplies that require measurement of high frequency current components.

Rohde & Schwarz; www.rohde-schwarz.com/ad/Press/scope_portfolio