Contact the closest office: 1-800-358-5525

Rohde and Schwarz

Rohde & Schwarz RF Power Meter and Sensors

NRP Series RF Power Meter and Power Sensors

Model NRP Power Meter

and Sensors


  • Dynamic Range of 90 dB Through Innovative Multipath SMART SENSOR TECHNOLOGY™
  • High Measurement Speed Saves Time in Manufacturing Test
  • Sensors Retain Calibration Data in Built-In Memory, and Are Immediately Ready for Measurement
  • Accurate Measurement of Average Power Regardless of Bandwidth and Modulation
  • Multislot Measurements for Common Time Division Systems (e.g. GSM/EDGE, DECT)
  • Intelligent Sensors Can be Operated Directly from PC via USB Interface
  • Up to 4 Sensors Can Be Plugged into the NRP Base Unit for 4-Channel Measurements

The NRP RF and Microwave Power Meter is suitable for research and development, production and mobile service as well as the analysis of broadband modulation signals of third-generation mobile radio. In research applications, the NRP excels with high measurement accuracy and a dynamic range of 90 dB. This applies to broadband signals of any modulation, including RF bandwidths beyond 100 MHz for wireless LAN. The NRP base unit accommodates up to 4 sensor heads, and displays all four measurement results at the same time. Alternatively, the sensors can be connected directly to a PC via USB interface. Applications in manufacturing test also benefit from the instrument's high measurement speed, its ease of use, and remote controllability. The NRP is lightweight and robust, and operates over a wide temperature range. This makes the instrument an excellent choice also for installation, service and maintenance in the field.

Smart Sensor Technology - Plug and go!

The accuracy of microwave power measurements depends on the sensor characteristics and is impacted by signal level, temperature and frequency. For the NRP, Rohde & Schwarz is using an approach it introduced years ago: all calibration data is stored directly in the sensor, which ensures high-precision measurements and minimizes operating errors. This eliminates the need for calibration before the measurement. After plugging in the sensor the measurement can be started immediately. The sensors can perform reliable measurements for an extended period of time and the recommended calibration interval is 2 years.

In the past, microwave power meters required different sensors to cover all applications: thermal, diode as well as peak power sensors. The sensors from the NRP family now make life much easier – in many cases, a single sensor can perform all necessary measurements: average power, burst power and time gating also on signals with high bandwidth and wide dynamic range. This capability is achieved with the innovative SMART SENSOR TECHNOLOGY™, a fused multiple-path architecture:

  • 3 signal paths, each fitted with triple diodes
  • 6 dB wide overlap ranges, smooth transitions from one path to the other
  • Parallel signal processing in the three paths with simultaneous scanning and analysis
  • Chopper stabilization of signal paths for recurring signals

Power Sensor with USB Interface - Connect Directly to a PC

The sensors of the NRP-Z series are complete miniature power meters, and can be used alone without the NRP display unit. The sensors contain a CPU that controls the sensor, processes the measurement results and operates the interface. All measurement data and settings can be transmitted via an optional USB interface. This concept is being used for the first time in classic microwave power measurement.

Connecting the sensors directly to a PC is the most cost-effective method for high-precision power measurements, especially if a PC is used already for data acquisition and evaluation. This is commonly the case in production environments that include a process controller. Omitting the NRP display unit saves space in the rack and reduces costs. Service technicians will also appreciate this option since the power sensor is only 1.9 x 1.2 x 6.7 inches and can easily be operated from a laptop.

A software toolkit is required to control the NRP power sensors via a PC. This toolkit is supplied as standard with every NRP sensor. It includes a DLL (dynamic link library) for individualized use of the entire sensor functionality under Windows, and the Power Viewer, a virtual power meter with basic measurement functions for the PC workstation. The Power Viewer includes a subset of the functionality of the NRP base unit. The passive USB Adapter NRP-Z4 provides all basic functions. It handles the transmission of settings and measurement data as well as the power supply of the sensor. The active USB Adapter NRP-Z3 for applications requiring external triggering of the power sensor. It also offers a separate power supply.

Universal Display Unit

For applications requiring a basic unit, the NRP offers key advantages. It has a small size, and is lightweight and rugged. It can be fitted with one, two or four measurement inputs (Options NRP-B2 and NRP-B5). GPIB is standard as are trigger input and analog measurement output.

The user interface of the NRP power meter is controlled similarly to a PC via menu bars, menus and dialog boxes. All functions are grouped into only three menu levels, and the operating concept is self-explanatory. The high-resolution graphical display can show as many as four measurement results at the same time. The user can choose whether to display data from up to four different sensors, or from different timeslots of a TDMA signal measured by one sensor. Values obtained by calculation, such as SWR or return loss, can also be displayed.

NRP Display Unit Options:

  • NRP-B1: Sensor Check Source - The test generator is provided to check the function of the sensor, eg. after overloading or excessive mechanical stress. It generates a low-distortion, highly accurate 50 MHz signal of 1 mW power (0 dBm).
  • NRP-B2: Second Sensor Input (B) - Provides the 2nd sensor input, located on the front panel of the NRP.
  • NRP-B5: 3rd and 4 th Sensor Input (C, D) - The NRP unit can be equipped with 4 measurement inputs to handle 4 sensors simultaneously. To make the results from all 4 sensors visible 4 different display windows can be opened on the NRP unit. All the results from the four different sensors can be transmitted via the remote interface to a PC in parallel.
  • NRP-B6: Rear-panel Sensor Input A & B - Using the NRP in a test rack, it is useful to change the 1st and 2nd sensor input from the front side to the rear panel. (not to be fitted with option R&S NRP-B5).

Ordering Information:

Rohde & Schwarz NRP RF Power Meter includes Operating Manual, Power Cord, Fuses

Rohde & Schwarz Opt. B1 Sensor Check Source 1 mW, 50 MHz

Rohde & Schwarz Opt. B2 Second Sensor Input (B)

Rohde & Schwarz Opt. B3 Battery Supply With built-in charger and NIMH battery

Rohde & Schwarz Opt. B4 Ethernet LAN Interface

Rohde & Schwarz Opt. B5 Third & Forth Sensor Inputs (C & D) On rear panel

Rohde & Schwarz Opt. B6 Sensor Inputs A & B Moded to Rear Panel
(Cannot be ordered in conjunction with Opt. B5)


NRP-Z11 Power Sensor 200 pW to 200 mW, 10 MHz to 8 GHz

NRP-Z21 Power Sensor 200 pW to 200 mW, 10 MHz to 18 GHz

NRP-Z51 Power Sensor 1 µW to 100 mW, DC to 18 GHz

NRP-Z205 Sensor Extension Cable, 3.5 M extends to 5 M total length

NRP-Z210 Sensor Extension Cable, 8.5 M extends to 10 M total length

NRP-Z22 Power Sensor 2 nW to 2 W, 10 MHz to 18 GHz

NRP-Z23 Power Sensor 20 nW to 15 W, 10 MHz to 18 GHz

NRP-Z24 Power Sensor 60 nW to 30 W, 10 MHz to 18 GHz

NRP-Z3 USB Sensor Adaptor (active)

NRP-Z4 USB Sensor Adaptor (passive)

ZZA-T26 Rack Adapter For one NRP plus dummy panel

ZZA-T27 Rack Adapter For two NRP meters

About...  |  Table of Contents  | Manufacturer Index  | What's New

Send Inquiries to:

Copyright © 2009 Davis Instruments. All rights reserved.