R&S NRPxxS Series User manual

R&S®NRPxxS(N)
Three-Path Power Sensors
User Manual
User Manual
Version 10
1177507902
(;ÛÀÝ2)

This manual describes the following three-path diode power sensors with firmware version FW 02.00 and
later:
●R&S®NRP8S (1419.0006.02)
●R&S®NRP8SN (1419.0012.02)
●R&S®NRP18S (1419.0029.02)
●R&S®NRP18SN (1419.0035.02)
●R&S®NRP33S (1419.0064.02)
●R&S®NRP33SN (1419.0070.02)
●R&S®NRP40S (1419.0041.02)
●R&S®NRP40SN (1419.0058.02)
●R&S®NRP50S (1419.0087.02)
●R&S®NRP50SN (1419.0093.02)
It also describes the following TVAC-compliant three-path diode power sensor:
●R&S®NRP33SN-V (1419.0129.02)
© 2019 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
Fax: [phone]
Email: [email protected]
Internet: www.rohde-schwarz.com
Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1177.5079.02 | Version 10 | R&S®NRPxxS(N)
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol, for example R&S®NRP18SN is abbre-
viated as R&S NRP18SN.

Contents
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3User Manual 1177.5079.02 ─ 10
Contents
1 Preface.................................................................................................... 7
1.1 For Your Safety..............................................................................................................7
1.2 Documentation Overview............................................................................................. 7
1.3 Typographical Conventions......................................................................................... 9
2 Key Features.........................................................................................10
3 Preparing for Use................................................................................. 11
3.1 Unpacking and Checking the Power Sensor............................................................ 11
3.2 Operating Conditions..................................................................................................11
3.3 Important Aspects for Test Setup..............................................................................12
3.4 Connecting to a DUT...................................................................................................12
3.5 Connecting to a Computer......................................................................................... 13
3.6 Connecting to a USB Host......................................................................................... 22
4 Power Sensor Tour.............................................................................. 23
4.1 RF Connector.............................................................................................................. 23
4.2 Trigger I/O Connector................................................................................................. 24
4.3 Host Interface.............................................................................................................. 24
4.4 Status LED................................................................................................................... 25
4.5 LAN PoE Interface.......................................................................................................25
5 Operating Concepts.............................................................................27
5.1 R&S NRP Toolkit..........................................................................................................27
5.2 Browser-Based User Interface...................................................................................30
5.3 Remote Control........................................................................................................... 32
5.4 R&S NRPV....................................................................................................................32
5.5 R&S Power Viewer...................................................................................................... 34
5.6 R&S Power Viewer Mobile..........................................................................................37
5.7 R&S NRX...................................................................................................................... 37
5.8 R&S NRP2.................................................................................................................... 38
6 Browser-Based User Interface............................................................41
6.1 Main Dialog of the Web User Interface......................................................................41
6.2 Setting the Unit............................................................................................................42

Contents
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6.3 Common Settings....................................................................................................... 43
6.4 Measurement Modes...................................................................................................44
6.5 Settings........................................................................................................................ 48
7 Firmware Update..................................................................................57
7.1 Hardware and Software Requirements..................................................................... 57
7.2 Updating the Firmware............................................................................................... 57
8 Replacing an R&S NRP-Zxx with an R&S NRPxxS(N) ..................... 62
8.1 Most Important Differences........................................................................................62
8.2 Prerequisites............................................................................................................... 62
9 Remote Control Commands................................................................64
9.1 Conventions Used in SCPI Command Descriptions................................................64
9.2 Notations......................................................................................................................64
9.3 Common Commands.................................................................................................. 66
9.4 Preparing for the Measurement................................................................................. 70
9.5 Controlling the Measurement.................................................................................... 72
9.6 Configuring and Retrieving Results..........................................................................87
9.7 Configuring the Measurement Modes.......................................................................92
9.8 Configuring Basic Measurement Parameters........................................................ 104
9.9 Calibrating/Zeroing the Power Sensor ...................................................................125
9.10 Testing the Power Sensor........................................................................................ 127
9.11 Configuring the System............................................................................................128
9.12 Using the Status Register........................................................................................ 140
10 Performing Measurement Tasks - Programming Examples.......... 144
10.1 Performing the Simplest Measurement.................................................................. 144
10.2 Performing the Fastest Measurement in Continuous Average Mode.................. 144
10.3 Performing a Buffered Continuous Average Measurement.................................. 146
10.4 Performing Trace Measurements............................................................................ 148
10.5 Trace Measurement with Synchronization to Measurement Complete............... 149
11 Remote Control Basics......................................................................151
11.1 Remote Control Interfaces and Protocols.............................................................. 151
11.2 SCPI Command Structure........................................................................................ 155
11.3 Status Reporting System......................................................................................... 162

Contents
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12 Troubleshooting................................................................................. 175
12.1 Displaying Status Information................................................................................. 175
12.2 Performing a Selftest................................................................................................ 175
12.3 Problems during a Firmware Update...................................................................... 176
12.4 Cannot Establish a LAN Connection.......................................................................176
List of Commands..............................................................................177
Index....................................................................................................182

Contents
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6User Manual 1177.5079.02 ─ 10

Preface
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1 Preface
This chapter provides safety related information, an overview of the user documenta-
tion and the conventions used in the documentation.
1.1 For Your Safety
The R&S NRPxxS(N) is designated for use in industrial, administrative, and laboratory
environments. Use the R&S NRPxxS(N) only for its designated purpose. Observe the
safety and usage instructions documented in the user manual, as well as operating
conditions and performance limits stated in the data sheet.
The product documentation helps you to use the R&S NRPxxS(N) safely and effi-
ciently. Keep the product documentation in a safe place and pass it on to the subse-
quent users.
Safety information is part of the product documentation. It warns you about the poten-
tial dangers and gives instructions how to prevent personal injury or damage caused
by dangerous situations. Safety information is provided as follows:
●In the "Basic Safety Instructions", safety issues are grouped according to subjects.
For example, one subject is electrical safety. The "Basic Safety Instructions" are
delivered with the R&S NRPxxS(N) in different languages in print.
●Throughout the documentation, safety instructions are provided when you need to
take care during setup or operation. Always read the safety instructions carefully.
Make sure to comply fully with them. Do not take risks and do not underestimate
the potential danger of small details such as a damaged power cable.
1.2 Documentation Overview
This section provides an overview of the R&S NRPxxS(N) user documentation. Unless
specified otherwise, you find the documents on the R&S NRPxxS(N) product page at:
www.rohde-schwarz.com/product/nrp_s_sn
1.2.1 Getting Started Manual
Introduces the R&S NRPxxS(N) and describes how to set up and start working with the
product. Includes basic operations and general information, e.g. safety instructions,
etc. A printed version is delivered with the power sensor.
1.2.2 User Manuals
Contains the description of all instrument modes and functions. It also provides an
introduction to remote control, a complete description of the remote control commands
Documentation Overview

Preface
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8User Manual 1177.5079.02 ─ 10
with programming examples, and information on maintenance and interfaces. Includes
the contents of the getting started manual.
1.2.3 Tutorials
Tutorials offer guided examples and demonstrations on operating the R&S
NRPxxS(N) . They are provided on the product page of the internet.
1.2.4 Instrument Security Procedures
Deals with security issues when working with the R&S NRPxxS(N) in secure areas. It
is available for download on the Internet.
1.2.5 Basic Safety Instructions
Contains safety instructions, operating conditions and further important information.
The printed document is delivered with the instrument.
1.2.6 Data Sheets and Brochures
The data sheet contains the technical specifications of the R&S NRPxxS(N) . It also
lists the firmware applications and their order numbers, and optional accessories.
The brochure provides an overview of the instrument and deals with the specific char-
acteristics.
www.rohde-schwarz.com/brochure-datasheet/nrp_s_sn
1.2.7 Release Notes and Open Source Acknowledgment (OSA)
The release notes list new features, improvements and known issues of the current
firmware version, and describe the firmware installation.
The open source acknowledgment document provides verbatim license texts of the
used open source software.
www.rohde-schwarz.com/firmware/nrp_s_sn
1.2.8 Application Notes, Application Cards, White Papers, etc.
These documents deal with special applications or background information on particu-
lar topics.
www.rohde-schwarz.com/application/nrp_s_sn
Documentation Overview

Preface
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1.3 Typographical Conventions
The following text markers are used throughout this documentation:
Convention Description
"Graphical user interface ele-
ments"
All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.
[Keys] Key and knob names are enclosed by square brackets.
Filenames, commands,
program code
Filenames, commands, coding samples and screen output are distin-
guished by their font.
Input Input to be entered by the user is displayed in italics.
Links Links that you can click are displayed in blue font.
"References" References to other parts of the documentation are enclosed by quota-
tion marks.
Typographical Conventions

Key Features
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2 Key Features
The 3-path diode power sensors are members of the R&S NRP series power sensors
from Rohde & Schwarz.
They provide a high-speed USB interface that constitutes both the communication port
and the power supply connection.
Also, most sensors are available with an additional Gigabit Ethernet interface with
Power-over-Ethernet (PoE) power supply. The power sensors with networking capabili-
ties, the R&S NRP LAN power sensors, are marked with a trailing N in their names:
●R&S NRPxxSN
The R&S NRP33SN-V power sensor is optimized for the usage in a vacuum chamber
allowing measurements under special conditions.
The R&S NRP series power sensors are compatible with the R&S NRP‑Z power sen-
sors in both the interface (USB) and a common command subset. This compatibility
makes the replacement of the old power sensors easy.
For a detailed specification, refer to the data sheet.

Preparing for Use
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3 Preparing for Use
For information on safety, see:
●Chapter 1.1, "For Your Safety", on page 7
●Chapter 3.2, "Operating Conditions", on page 11
3.1 Unpacking and Checking the Power Sensor
Check the equipment for completeness using the delivery note and the accessory lists
for the various items. Check the power sensor for any damage. If there is damage,
immediately contact the carrier who delivered the power sensor. Make sure not to dis-
card the box and packing material.
Packing material
Retain the original packing material. If the instrument needs to be transported or ship-
ped later, you can use the material to protect the control elements and connectors.
3.2 Operating Conditions
Specific operating conditions are required to ensure accurate measurements and to
avoid damage to the power sensor and connected devices. Before switching on the
power sensor, observe the information on appropriate operating conditions provided in
the basic safety instructions and the data sheet of the power sensor.
In particular, ensure the following:
●The power sensor is dry and shows no sign of condensation.
●The ambient temperature does not exceed the range specified in the data sheet.
●Signal levels at the input connectors are all within the specified ranges.
●Signal outputs are connected correctly and are not overloaded.
Operating Conditions

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3.3 Important Aspects for Test Setup
Handling the R&S NRP33SN-V power sensor
Risk of contamination
Always wear clean protective gloves when handling the R&S NRP33SN-V vacuum
power sensors to protect the device and its environment from contamination.
Recommended bake-out procedure
When the sensor is inserted in a vacuum chamber, perform vacuum baking for 100
hours at 85°C at a pressure lower than 10-5 mbar.
Preventing electrostatic discharge (ESD)
ESD is most likely to occur when you connect or disconnect a DUT.
►NOTICE! Risk of electrostatic discharge (ESD). Electrostatic discharge (ESD) can
damage the electronic components of the power sensor and the device under test
(DUT).
Ground yourself to avoid electrostatic discharge (ESD) damage:
● Use a wrist strap and cord, and connect yourself to the ground.
● Use a conductive floor mat and heel strap combination.
EMI impact on measurement results
Electromagnetic interference (EMI) may affect the measurement results.
To suppress generated electromagnetic interference (EMI):
●Use suitable shielded cables of high quality. For example, use double-shielded RF
and LAN cables.
●Always terminate open cable ends.
●Note the EMC classification in the data sheet.
3.4 Connecting to a DUT
For connecting the power sensor to a DUT, use the RF connector of the power sensor.
For details, see Chapter 4.1, "RF Connector", on page 23.
Connecting to a DUT

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13User Manual 1177.5079.02 ─ 10
Risk of overloading the sensor
Using a power sensor at a level above its upper measuring limit can damage the sen-
sor head. To avoid this risk, make sure not to exceed the test limit.
The test limits specified on the type label are valid only for the supplied attenuator. For
operation without attenuator, lower test limits apply, as specified in the data sheet.
To connect to the DUT
1. Ensure that the RF connector of your DUT is compatible with the RF connector of
the power sensor.
2. Insert the RF connector straight into the RF output of your DUT. Take care not to tilt
it.
180
NRP
3-Path Diode Power Sensor
MHz to GHz, 100 pW to 200 mW (−70 dBm to +23 dBm)
SMART SENSOR TECHNOLOGY
3. NOTICE! Risk of damaging the center pin of the RF connector. Always rotate only
the hex nut of the RF connector. Never rotate the power sensor itself.
Tighten the RF connector manually.
4. To ensure maximum measurement accuracy, tighten the RF connector using a tor-
que wrench with the nominal torque recommended in Chapter 4.1, "RF Connector",
on page 23.
To disconnect from the DUT
►NOTICE! Risk of damaging the center pin of the RF connector. Always rotate only
the hex nut of the RF connector. Never rotate the power sensor itself.
Carefully loosen the union nut at the front of the RF connector of the sensor and
remove the sensor.
3.5 Connecting to a Computer
For operating the power sensor, you can choose from various possibilities. For details,
see Chapter 5, "Operating Concepts", on page 27.
You can establish the connection using one of the following interfaces:
●Host interface
●LAN interface, if the power sensor is a LAN power sensor
Connecting to a Computer

Preparing for Use
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Contents:
●Setting Up a USB Connection.................................................................................14
●Setting Up a LAN Connection................................................................................. 16
3.5.1 Setting Up a USB Connection
You can connect a R&S NRPxxS(N) to a computer using the host interface and control
it as described in Chapter 5, "Operating Concepts", on page 27.
Further information:
●Chapter 11.1, "Remote Control Interfaces and Protocols", on page 151
3.5.1.1 Simple USB Connection
All R&S NRPxxS(N) power sensors can be connected to a computer by a USB inter-
face and controlled by a supported software or a remote program.
Required equipment
●R&S NRPxxS(N) power sensor
●R&S NRP‑ZKU cable
Setup
NRP
3-Path Diode Power Sensor
MHz to GHz, 100 pW to 200 mW (−70 dBm to +23 dBm)
SMART SENSOR TECHNOLOGY
Figure 3-1: Setup with an R&S NRP
‑ ZKU cable
1 = Signal source
2 = R&S NRPxxS(N) power sensor
3 = Host interface connector
4 = R&S NRP‑ZKU cable
5 = USB connector
6 = Computer with installed VISA driver or R&S NRP Toolkit
Incorrectly connecting/disconnecting the R&S NRPxxS(N) power sensors can damage
the power sensors or lead to erroneous results.
Ensure that you connect/disconnect your power sensor as described in Chapter 3,
"Preparing for Use", on page 11.
1. Connect the cables as shown in Figure 3-1 :
Connecting to a Computer

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15User Manual 1177.5079.02 ─ 10
a) Connect the R&S NRP‑ZKU cable to the power sensor.
b) Connect the R&S NRP‑ZKU cable to the computer.
c) Connect the power sensor to the signal source.
2. On the computer, start a software application to view the measurement results.
See Chapter 5, "Operating Concepts", on page 27.
3.5.1.2 R&S NRP‑Z5 Sensor Hub Setup
The R&S NRP‑Z5 sensor hub (high-speed USB 2.0) can host up to four R&S
NRPxxS(N) power sensors and provides simultaneous external triggering to all con-
nected sensors.
Required equipment
●1 to 4 R&S NRPxxS(N) power sensors
●1 R&S NRP‑ZK6 cable per sensor
●R&S NRP‑Z5 sensor hub with external power supply unit and USB cable
●BNC cables to connect the trigger input and trigger output signals (optional)
Setup
TTL /CMOS
TTL /CMOS
NRP
3-Path Diode Power Sensor
MHz to GHz, 100 pW to 200 mW (−70 dBm to +23 dBm)
SMART SENSOR TECHNOLOGY
Figure 3-2: Setup with an R&S NRP-Z5 sensor hub
Connecting to a Computer

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1 = R&S NRP‑Z5 sensor hub
2 = External power supply unit (supplied)
3 = Power cable (supplied)
4 = AC power supply
5 = USB cable (supplied)
6 = Computer with USB host interface
7, 8 = BNC cable (optional, not supplied)
9 = Trigger source (optional)
10 = Triggered device (optional)
11-14 = R&S NRP‑ZK6 cable
15 = Host interface connector
16 = R&S NRPxxS(N) power sensor
17 = Signal source
Incorrectly connecting/disconnecting the R&S NRPxxS(N) power sensors can damage
the power sensors or lead to erroneous results.
Ensure that you connect/disconnect your power sensor as described in Chapter 3,
"Preparing for Use", on page 11.
1. Connect the cables as shown in Figure 3-2:
a) Connect the R&S NRP‑ZK6 cable to the power sensor.
b) Connect the power sensors to the R&S NRP‑Z5 sensor hub. You can connect
up to four sensors.
c) Connect the R&S NRP‑Z5 to the computer.
d) Connect the power sensors to the signal source.
e) Connect the delivered external power supply unit to the R&S NRP‑Z5 and to an
AC supply connector.
f) Connect the trigger input of the R&S NRP‑Z5 with a BNC cable to the trigger
source (optional).
g) Connect the trigger output of the R&S NRP‑Z5 with a BNC cable to the trigger
device (optional).
2. On the computer, start a software application to view the measurement results.
See Chapter 5, "Operating Concepts", on page 27.
3.5.2 Setting Up a LAN Connection
Requires power sensors with networking capabilities, the R&S NRP LAN power sen-
sors.
This section describes how to connect the sensor to a LAN network and configure the
LAN interface for establishing a connection.
Connecting to a Computer

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Electromagnetic interference (EMI) can affect the measurement results. To avoid any
impact, use category 5 cables or better.
3.5.2.1 Connecting a LAN Power Sensor and a Computer
There are different ways to connect a LAN power sensor to a computer according to
the available equipment:
Setup with a PoE Ethernet switch
Ethernet Switch
(PoE)
1
4
6
5
2
3
HOST
INTERFACE
IN: 3 V or 5 V logic
OUT: min. 2 V into 50 Ω
max. 5.3 V
TRIG2
I/0
PoE
SMART SENSOR TECHNOLOGY
NRP 7
Figure 3-3: Setup with a PoE Ethernet switch
1 = Signal source
2 = LAN power sensor
3 = RJ-45 Ethernet connector
4, 6 = RJ-45 Ethernet cable
5 = Ethernet switch supporting PoE power delivery, e.g. R&S NRP-ZAP1
7 = Computer
1. Connect the [RF] connector of the sensor to the DUT.
2. NOTICE! Risk of sensor damage. Use only PoE power sourcing equipment (PSE)
according to IEEE standards 802.3af or IEEE 802.3at.
Otherwise your power sensor can get damaged.
Connect the RJ-45 Ethernet connector of the sensor to an Ethernet switch that
supports PoE power delivery.
3. Connect the computer to the Ethernet switch.
4. Establish a connection between the power sensor and the network.
See Chapter 3.5.2.2, "Establishing a Connection to the Network", on page 19.
Connecting to a Computer

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Setup with a PoE injector and a Non-PoE Ethernet switch
Non-PoE
Ethernet Switch
1
4
6
5
2
3
HOST
INTERFACE
IN: 3 V or 5 V logic
OUT: min. 2 V into 50 Ω
max. 5.3 V
TRIG2
I/0
PoE
SMART SENSOR TECHNOLOGY
NRP
7
PoE Injector
8
9
10
Figure 3-4: Setup with a PoE injector and a Non-PoE Ethernet switch
1 = Signal source
2 = LAN power sensor
3 = RJ-45 Ethernet connector
4, 7,9 = RJ-45 Ethernet cable
5 = PoE injector
6 = AC supply
8 = Non-PoE Ethernet switch
10 = Computer
1. Connect the [RF] connector of the sensor to the DUT.
2. NOTICE! Risk of sensor damage. Use only PoE power sourcing equipment (PSE)
according to IEEE standards 802.3af or IEEE 802.3at.
Otherwise your power sensor can get damaged.
Connect the RJ-45 Ethernet connector of the sensor to the output of the PoE injec-
tor.
3. Connect the PoE injector to a power supply.
4. Connect the input of the PoE injector to the Non-PoE Ethernet switch.
5. Connect the computer to the Non-PoE Ethernet switch.
6. Establish a connection between the power sensor and the network.
See Chapter 3.5.2.2, "Establishing a Connection to the Network", on page 19.
Connecting to a Computer

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Setup with a PoE injector
1
4
6
5
2
3
HOST
INTERFACE
IN: 3 V or 5 V logic
OUT: min. 2 V into 50 Ω
max. 5.3 V
TRIG2
I/0
PoE
SMART SENSOR TECHNOLOGY
NRP
7
PoE Injector
8
Figure 3-5: Setup with a PoE injector
1 = Signal source
2 = LAN power sensor
3 = RJ-45 Ethernet connector
4, 7 = RJ-45 Ethernet cable
5 = PoE injector
6 = AC supply
8 = Computer
1. Connect the [RF] connector of the sensor to the DUT.
2. NOTICE! Risk of sensor damage. Use only PoE power sourcing equipment (PSE)
according to IEEE standards 802.3af or IEEE 802.3at.
Otherwise your power sensor can get damaged.
Connect the RJ-45 Ethernet connector of the sensor to the output of the PoE injec-
tor.
3. Connect the PoE injector to a power supply.
4. Connect the computer to the input of the PoE injector.
5. Establish a network connection between the power sensor and the computer.
3.5.2.2 Establishing a Connection to the Network
There are two methods to establish a network connection:
●Power sensor and computer are connected to a common network
(infrastructure network).
●Power sensor and computer are connected only over the switch
(peer-to-peer network).
In both cases, you can address the LAN power sensor as follows:
●Chapter 3.5.2.3, "Using Hostnames", on page 20
●Chapter 3.5.2.4, "Assigning the IP Address", on page 21
Connecting to a Computer

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To set up a network Ethernet connection
1. Connect the power sensor to the network or to a single computer.
By default, the power sensor is configured to use dynamic TCP/IP configuration
(DHCP) and to obtain the address information automatically.
If both LAN status LEDs are illuminated in green color, the power sensor is cor-
rectly connected to the network.
Note: Establishing a connection can take up to 2 minutes per device.
2. If the LAN status LEDs show another state, no connection is possible. For possible
solutions, see:
●"Network status LED" on page 26
●"Troubleshooting for peer-to-peer connections" on page 20
Troubleshooting for peer-to-peer connections
1. Allow a waiting time, especially if the computer was used in a network before.
2. Check that only the main network adapter is active on the computer. If the com-
puter has more than one network interfaces, explicitly disable all other network
interfaces if you plan to utilize a peer-to-peer connection to the power sensor.
3. Check that the remaining main network adapter has been assigned an IP address
starting with 169.254. The IANA (Internet assigned numbers authority) has
reserved the range 169.254.0.0 to 169.254.255.255 for the allocation of
automatic private IP addresses (APIPA). Addresses from this range are guaranteed
to cause no conflicts with any routable IP address.
4. Try to establish a connection to the power sensor with both the default hostname
and the hostname extended with .local, for example:
nrp18sn-101441
nrp18sn-101441.local
3.5.2.3 Using Hostnames
In a LAN that uses a domain name system (DNS) server, each connected computer or
instrument can be accessed via an unambiguous hostname instead of an IP address.
The DNS server translates the hostname to the IP address. Using the hostname is
especially useful when a DHCP server is used, as a new IP address can be assigned
each time the instrument is restarted.
Each power sensor is delivered with a default hostname assigned. You can change the
default hostname.
Default hostname
The default hostname follows the syntax:
<device name>-<serial number>, where:
●<device name> is the short name of your sensor.
For example, the <device name> of R&S NRP18SN is nrp18sn.
Connecting to a Computer