Rohde & Schwarz NRPM OTA Power Measurement Solution, Manual

Page: 38 / 229

Setting up a measurement
R&S
®
NRPM
38 Mannual 1425.8663.02 ─ 08
6 Setting up a measurement
This section points out important aspects to consider when setting up an
R&S
NRPM OTA power measurement. It shows some test setup examples and
brief instructions on how to connect the components. You can also find referen-
ces to the product page and the user manual of the RF shielded box
R&S
CMQ200 or an RF test chamber.
● Test setup examples ....................................................................................... 38
● R&S CMQ200 shielding cube ......................................................................... 42
● Connecting an R&S NRPM OTA power measurement ................................... 43
● Starting the measurement ...............................................................................57
6.1 Test setup examples
The following section shows some test setups examples with an RF shielded box
and within an RF test chamber. The main difference is that the sensor module is
either inside, or outside the EM-controlled test environment:
●
RF shielded box
The sensor module is outside the RF shielded box, connected to the antenna
modules via the feedthrough module (R&S
NRPM-ZD3) and the interface
cable (R&S NRPM-ZKD3).
●
RF test chamber
The sensor module is inside an RF test chamber, directly connected to the
antenna modules via the interface module (R&S
NRPM-Z3).
See also the application note 1GP118 .
Always operate the antenna modules in an environment that is protected
against electromagnetic interference.
The described examples refer to measurements performed with
R&S
Power Viewer, which allows you to measure the readings of up to four
R&S NRPM3(N) sensor modules (12 antenna module channels) at a time. This
number corresponds to 12 single or 6 dual polarized antenna modules. Techni-
cally, more are possible, i.e. you can select any number of antenna modules for
your measurement.
Test setup examples