Rohde & Schwarz NRP-Z28 User manual

1170.8966.12-081
Operating Manual
Level Control Sensor
R&SNRP-Z28
1170.8008.02
R&SNRP-Z98
1170.8508.02
Test and Measurement

1170.8966.12-082
Dear Customer,
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG
Trade names are trademarks of the owners.

R&S NRP-Z28/Z98 Safety Information
1170.8966.12 I E-1
Safety Information
Safety information is part of the product documentation. It warns you of potential dangers and gives
instructions on how to prevent personal injury or damage caused by dangerous situations. Safety
information is provided as follows:
•In the Getting Started manual, Chapter 1.1 “Safety instructions”. The same information is provided in
many languages as printed "Safety Instructions". Both documents are delivered with the power
sensor.
•Throughout the documentation, safety instructions are provided when you need to take care during
setup or operation.

R&S NRP-Z28/-Z98 Table of Contents Chapter 1
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Table of Contents
1Putting into Operation......................................................................................................1.1
Unpacking the sensor......................................................................................................................1.1
Connecting the sensor ....................................................................................................................1.1
Operation with the R&S NRP/NRP2 power meter .........................................................................1.3
Connecting the power sensor.....................................................................................................1.3
Performing measurements .........................................................................................................1.4
PC control .........................................................................................................................................1.5
Hardware and software requirements ........................................................................................1.5
Operation via the R&S NRP-Z4 passive USB adapter...............................................................1.7
Operation via the R&S NRP-Z3 active USB adapter..................................................................1.7
Operation via the R&S NRP-Z5 Sensor Hub..............................................................................1.9
Equipment Supplied and Alternative Accessories ............................................................. 1.9
Ports and LEDs................................................................................................................ 1.10
Test Setup........................................................................................................................ 1.11
Troubleshooting ............................................................................................................... 1.13
Connecting the sensor to the source and the DUT ..................................................................1.14
Performing measurements .......................................................................................................1.14
Operation with other Rohde & Schwarz test instruments..........................................................1.15
Hardware and software requirements ......................................................................................1.15

List of Figs. Chapter 1 R&S NRP-Z28/-Z98
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Figs.
Fig. 1-1 Configuration with the R&S NRP/NRP2 ............................................................................ 1.4
Fig. 1-2 Displaying the total available power of a USB port............................................................ 1.6
Fig. 1-3 Power measurement on PC with the R&S NRP-Z4 passive USB adapter........................ 1.7
Fig. 1-4 Power measurement on PC with the R&S NRP-Z3 active USB adapter........................... 1.7
Fig. 1-5 Changing the primary adapter ........................................................................................... 1.8
Fig. 1-6 Ports and LEDs on front panel......................................................................................... 1.10
Fig. 1-7 Ports on rear panel........................................................................................................... 1.10
Fig. 1-8 Unlatching the R&S Instrument connector....................................................................... 1.11
Fig. 1-9 Typical test setup with R&S NRP-Z5 and PC.................................................................. 1.12
Fig. 1-10 Changing the view in Device Manager ............................................................................ 1.13
Fig. 1-11 Identification of USB root hub on which R&S NRP-Z5 is operated ................................. 1.13
Fig. 1-12 Deactivation of Selective Suspend for a USB root hub ................................................... 1.14

R&S NRP-Z28/-Z98 Connecting the sensor
1170.8966.12 1.1 E-6
1 Putting into Operation
NOTICE
Follow the instructions below precisely to prevent damage to the sensor –particularly
when you are putting the power sensor into operation for the first time.
Unpacking the sensor
Remove the power sensor from its packing and check that nothing is missing. Inspect all items for
damage. If you discover any damage, inform the carrier responsible immediately and keep the packing
to support any claims for compensation.
It is also best to use the original packing if the power sensor is to be shipped or transported at a later
date.
The power sensor contains components which can be destroyed by electrostatic
discharges. To prevent this from happening, never touch the inner conductor of the RF
connector and never open the power sensor.
Connecting the sensor
NOTICE
To prevent EMI, the power sensor must never be operated with its enclosure wholly or
partially removed. Only use shielded cables that meet the relevant EMC standards.
Never exceed the maximum RF power limit. Even brief overloads can destroy the
integrated power sensor.
To prevent erroneous measurements, always terminate the RF output of the power sensor
(at the cable end) with a matched load or matched measuring instrument input.
In many cases, the RF connector only requires manual tightening. However, for maximal
measurement accuracy, the RF connector must be tightened using a torque wrench with a
nominal torque of 1.36 Nm (12" lbs.).

Connecting the sensor R&S NRP-Z28/-Z98
1170.8966.12 1.2 E-6
!!
Do not apply excessive mechanical force to the RF
connectors of the R&S NRP-Z28/-Z98 and DUT!
FF
FF

R&S NRP-Z28/-Z98 Connecting the sensor
1170.8966.12 1.3 E-6
Make sure the bending radius of the RF connecting
cable is at least 50 mm!
A tighter bend can permanently impair the
matching of the RF input!
Operation with the R&S NRP/NRP2 power meter
Connecting the power sensor
The power sensor can be connected to the R&S NRP/NRP2 base unit when it is in operation. The
multiple circular plug-in connector must be inserted, red marking upwards, into one of the
R&S NRP/NRP2 base unit’s sensor connectors. When the power sensor is connected, it is detected by
the R&S NRP/NRP2 base unit and initialized.
Connect the RF connector of the connecting cable to the output of a signal source, and connect the RF
connector of the power meter to the input of the DUT. To screw on the power sensor more easily and
without tilting it, slightly lift it.
> 100 mm
!!

Connecting the sensor R&S NRP-Z28/-Z98
1170.8966.12 1.4 E-6
Fig. 1-1 Configuration with the R&S NRP/NRP2
Performing measurements
The R&S NRP-Z28/-Z98 power sensors behave in a similar manner as the R&S NRP-Z21 and
R&S NRP-Z91 multipath diode sensors. Unlike these, however, instead of the power fed to the sensor,
the power Psupplied to the DUT is measured. By means of the S-parameter correction function,
adapters or attenuators connected ahead of the DUT can be taken into consideration. The gamma
correction function allows the influence of a mismatched DUT to be reduced.
G
DUT
R&S NRP/NRP2
R&S NRP-Z28/-Z98
P