Rohde and Schwarz NRP-Z31 Three-Path Diode Power Sensor, 33 GHz

The Rohde & Schwarz NRP-Z31 is a three-path diode power sensor designed for precise power measurements across RF and microwave applications. It delivers a dynamic range of 90 dB for both CW and modulated signals, supporting continuous average, burst average, timeslot average, time gating, and trace measurement modes. The sensor operates from 10 MHz to 33 GHz with a 3.5 mm connector and achieves up to 1500 measurements per second in buffered mode.

It integrates with Rohde & Schwarz NRP2 base units or connects directly to a PC or laptop via USB, making it suitable for wireless standards testing (LTE, 3GPP, GSM, WiMAX, WLAN), automotive radar development at 24 GHz, and satellite communication system maintenance. The sensor compensates for cable losses, reflections, and other interfering effects using offset, S-parameter, and Γ correction techniques.

Technical Specifications

• Measurement Range: –67 dBm to +23 dBm (200 pW to 200 mW)


• CW Power: –67 dBm to +23 dBm


• Burst Average Power: –37 dBm to +23 dBm


• Timeslot/Gate Average Power: –62 dBm to +23 dBm


• Frequency Range: 10 MHz to 33 GHz


• Dynamic Range: Up to 90 dB for CW and modulated signals


• Video Bandwidth: 100 kHz (trace and timeslot modes)


• Connector Type: 3.5 mm

Key Features

• Automatic burst detection and acquisition


• Low sensitivity to harmonics


• Measurement rate up to 1500/s in buffered mode


• Offset, S-parameter, and Γ correction for cable loss and reflection compensation


• Compatible with R&S NRP Toolkit software and R&S NRPV Virtual Power Meter software

Typical Applications

• Automotive radar development and production


• Wireless standards verification (LTE, 3GPP, GSM, WiMAX, WLAN)


• Satellite communication system installation and maintenance


• Average power measurement of modulated signals

Compatibility & Integration

• Operates with Rohde & Schwarz NRP2 base units


• Direct USB connection to PC or laptop


• Compatible with R&S signal generators, analyzers, and network analyzers