R&S NRP-Z27 Operating Manual page 22

Connecting the sensor
4. Double-clicking USB Root Hub opens the USB Root Hub Properties dialog box. Select the Power
Management tab. Remove the check mark next to Allow the computer to turn off this device to
save power and confirm this with OK.
Fig. 1-12 Deactivation of Selective Suspend for a USB root hub
Connecting the sensor to the DUT
The power sensor modules have a male N connector (R&S NRP-Z27) or a male 3.5 mm connector
(R&S NRP-Z37) on their RF input and can thus be connected to any standard female N or
2.92 mm/3.5 mm/SMA connector, respectively. To connect the power sensor module to the DUT more
easily and without tilting it, relieve it by slightly lifting it.
Performing measurements
The R&S NRP uses the power sensor modules in the same manner as the thermal power sensors of
the R&S NRP-Z5x series. An exception is the S-parameter correction function, which is always
activated in the power sensor modules. This function takes the integrated power splitter into
consideration. Therefore, the influence of adapters or attenuators which are connected ahead of the
input of the power sensor module cannot be compensated via the S-parameter correction function.
However, compensation by using a global offset or an offset table is always possible.
1169.3870.12 1.14
R&S NRP-Z27/-Z37
E-6