R&S®NRT Power Reflection Meter

Directional power meter measures the power flow in both directions between source and load .

This is a discontinued product
Please note the following successor product(s):

Versatile measurement functions...

Power Reflection Meter NRT is the right choice: rugged, accurate and compact. Due to the large variety of measurement functions and high accuracy it is suitable for classic applications in mobile use as well as for use in research, development, production and quality management.

...from HF through to digital radiocommunications

With Power Sensors NRT-Z43 and NRT-Z44, NRT is tailor-made to present and future requirements of radiocommunications: the wide frequency range from 200 (400)MHz o 4 GHz covers all relevant frequency bands, the measurement method is compatible with all common analog and in particular digital modulation standards: GSM/EDGE, 3GPP (W-/TD-CDMA), CDMA (IS-95), CDMA2000, PHS, NADC, PDC, TETRA, DECT, DAB, DVB-T and many more.The complete range of sensors of the predecessor model NAP is available for he customary frequency ranges, eg. shortwave; the sensors can be connected via an option.

Measurement directly on PC

While conventional power sensors can only be used in conjunction with a basic unit, the NRT family is a step further ahead: the sensors are self-contained measuring instruments which are able to communicate with the basic unit or with a PC via a standard serial data interface.

Apart from he possibility of operating he sensor directly at the RS-232 or PC Card interface of a PC, this concept provides a number of further benefits: practically maintenance-free basic unit, high immunity to radiated interference - an important feature for measurements in he near field of antennas - and remote operation over very long distances (up to 500 m).

Ease of operation

With its large display and a manageable number of clearly laid-out keys, operation of the NRT basic unit is extremely easy. Switchover between the main functions is made at a keystroke. Additional settings are selected in three clearly arranged menus, each of which can be accessed at a keystroke.

A large variety of functions is available for daily routine measurements:

  • Choice between average power, average burst power, peak envelope power (PEP)and peak-to-average power ratio (crest factor)
  • Switchover between forward power and absorbed power
  • Measurement of power differences in dB or %
  • Choice between return loss, SWR, reflection coefficient and reverse-to-forward power ratio in %in reflection measurements
  • Display of amplitude distribution (CCDF) for modulated signals
  • Consideration of cable loss between sensor and load
  • Acoustic SWR monitoring
  • Indication of maximum and minimum values
  • Quasi-analog bargraph display
  • Choice between measurement at the source or at the load


  • Power measurement on transmitters, amplifiers, industrial RF and microwave generators
  • Simultaneous display of power and reflection
  • Measurement of average power irrespective of modulation mode
  • Measurement of peak power, crest factor and average burst power
  • Compatible with all main digital standards, eg. GSM/EDGE, 3GPP (W-/TD-CDMA), CDMA (IS-95), CDMA2000, PHS, NADC, PDC, TETRA, DECT, DAB, DVB-T...
  • Intelligent sensors: simply plug in and go
  • IEC625 (IEEE488)bus and RS-232 interface
  • Digital interface between sensor and basic unit
  • Direct connection of sensor to a PC
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