Two-path diode power sensors offer cost-effective power measurements

Two new two-path diode power sensors from Rohde & Schwarz, the NRP-Z211 (up to 8 GHz) and R&S NRP-Z221 (up to 18 GHz), offer high measurement speed and accuracy for the price-sensitive production market.   

Picture: Rohde

The two new models round out the company’s portfolio of multipath diode power sensors in the lower price segment. Power measurements over a dynamic range of 80 dB (-60 dBm to +20 dBm) are now possible for both CW and modulated signals. According to Rohde & Schwartz, the noise component is half that of comparable solutions on the market. As a result, measurement speed is increased by a factor of four.
The sensors are based on R&S’s patented multipath technology. The overlapping diode paths are measured in parallel. They are weighted in the transition range to ensure a smooth transition between measurement paths and eliminate differential nonlinearity. In addition, the user does not have to switch paths, since both diode paths are measured in parallel. This increases measurement accuracy and reduces measurement times.
The new power sensors can be operated on the R&S NRP2 base unit and on virtually all signal generators, spectrum analysers and network analysers from Rohde & Schwarz. In combination with the R&S NRP-Z4 USB adapter, the sensors can also be used directly with a PC.

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