Welcome to the R&S NRPM OTA power measurement solution
R&S®NRPM
13Manual 1425.8663.02 ─ 08
2.2 About the R&S NRPM OTA power measurement
solution
The power measurement solution consists of antenna modules, a three-channel
sensor module, and interface modules for connecting the antenna modules to the
sensor module. A PC measurement application demonstrates the use of the OTA
power measurement solution.
The R&S NRPM3 sensor modules provide a high-speed USB interface that con-
stitutes both, the communication port and the power supply connection. The
R&S NRPM3N LAN sensor module adds a Gigabit Ethernet interface with Power-
over-Ethernet (PoE) power supply.
The single or dual-polarized antenna modules (R&S NRPM-A90, R&S NRPM-
A90D) are usually installed within an anechoic chamber, that can be:
●An RF shielded box, e.g. the R&S CMQ200.
The antenna modules are positioned inside the RF shielded box, the sensor
module is outside. The sensor module is connected by the feedthrough mod-
ule R&S NRPM-ZD3 that provides the interface for up to three antenna mod-
ules.
Especially designed for use with the R&S CMQ200, you can install up to six of
the feedthrough modules. An antenna ring inside the R&S CMQ200 allows
you to position and align the antenna modules flexibly according to the appli-
cation.
●An RF test chamber of larger dimensions.
The antenna modules and the sensor module are positioned inside the RF
test chamber. The interface module R&S NRPM-Z3, directly connected to the
sensor module provides the interface for up to three antenna modules.
With the single and dual polarized antenna modules (R&S NRPM-A90,
R&S NRPM-A90D), you can calibrate the DUT (transmit antenna) output power
and test the beamforming function.
The R&S NRPM measurement is controlled by an arbitrary user-definable mea-
surement application. For a quick startup, Rohde & Schwarz provides the free
interactive application R&S Power Viewer, which supports multiple sensor mod-
ules in the measurement modes "Continuous Average" and "Trace".
As an alternative way to operate an R&S NRPM3N sensor module, you can use
the browser based web browser-based user interface.
About the R&S NRPM OTA power measurement solution