Rohde & Schwarz R&S NRX Series User manual

R&S®NRX
Power Meter
Getting Started
1424707002
Version 09
(>HÔÔ2)

This document describes the following R&S®NRX models and options:
●R&S®NRX (1424.7005K02)
●R&S®NRX-B1 (1424.7805K02)
●R&S®NRX-B4 (1424.8901K02)
●R&S®NRX-B8 (1424.8301K02)
●R&S®NRX-B9 (1424.8601K02)
●R&S®NRX-K2 (1424.9208K02)
●R&S®NRX-K4 (1424.9308K02)
© 2021 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: [phone] - 0
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.
1424.7070.02 | Version 09 | R&S®NRX
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g.
R&S®NRX is indicated as R&S NRX.

Contents
R&S®NRX
3Getting Started 1424.7070.02 ─ 09
Contents
1 Safety and regulatory information....................................... 5
1.1 Safety Instructions................................................................................5
1.2 Labels on the product.......................................................................... 8
1.3 Warning messages in the documentation.......................................... 8
1.4 Korea certification class B...................................................................9
2 Documentation overview.................................................... 10
2.1 Getting started manual.......................................................................10
2.2 User manual........................................................................................ 10
2.3 Instrument security procedures........................................................ 10
2.4 Printed safety instructions.................................................................10
2.5 Data sheets and brochures................................................................ 11
2.6 Release notes and open source acknowledgment (OSA)...............11
3 Key features......................................................................... 12
4 Preparing for use................................................................. 13
4.1 Lifting and carrying............................................................................ 13
4.2 Unpacking and checking....................................................................13
4.3 Choosing the operating site.............................................................. 14
4.4 Setting up the product........................................................................14
4.4.1 Placing the product on a bench top...................................................... 14
4.4.2 Mounting the product in a rack..............................................................16
4.5 Considerations for test setup............................................................ 16
4.6 Connecting to power.......................................................................... 17
4.7 Connecting power sensors................................................................18
4.7.1 Sensor connectors A to D..................................................................... 18

Contents
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4Getting Started 1424.7070.02 ─ 09
4.7.2 Optional interface for R&S NRT-Z sensors (R&S NRX-B9).................. 19
4.7.3 LAN interface........................................................................................ 20
4.7.4 USB 2.0 host interfaces........................................................................ 21
4.8 Connecting USB and external devices............................................. 21
4.9 Switching on or off............................................................................. 21
5 Instrument tour.................................................................... 23
5.1 Front panel tour.................................................................................. 23
5.1.1 Sensor connectors A and B.................................................................. 23
5.1.2 Module bay........................................................................................... 24
5.1.3 Touchscreen..........................................................................................25
5.1.4 Keys...................................................................................................... 25
5.1.5 USB host interface................................................................................ 27
5.1.6 On/standby key..................................................................................... 27
5.2 Rear panel tour....................................................................................28
5.2.1 Trig In / Out 2 and Out 1 / Trig Out connectors..................................... 28
5.2.2 Ethernet interface..................................................................................29
5.2.3 USB device interface............................................................................ 29
5.2.4 USB host interface................................................................................ 29
5.2.5 AC supply and power switch.................................................................29
5.2.6 IEC 625/IEEE 488 interface.................................................................. 30
5.2.7 Name plate............................................................................................30
5.2.8 Sensor connectors C and D..................................................................31
6 Contacting customer support............................................ 32
Index..................................................................................... 33

Safety and regulatory information
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5Getting Started 1424.7070.02 ─ 09
1 Safety and regulatory information
The product documentation helps you use the product safely and efficiently. Fol-
low the instructions provided here and in the following chapters.
Intended use
Combined with the supported R&S power sensors, the R&S NRX base unit is
intended for power measurements in development and production. The supported
R&S power sensors are listed in the data sheet. Observe the operating conditions
and performance limits stated in the data sheet.
Target audience
The target audience is developers and technicians. The required skills and expe-
rience in power measurements depend on the used operating concept. While
manual operation is suitable for beginners, remote control requires expertise in
power measurements.
Depending on the used R&S power sensor, the applications vary greatly. A pro-
found knowledge of the intended application and test setup is recommended.
Where do I find 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 Chapter 1.1, "Safety Instructions", on page 5. The same information is
provided in many languages as printed "Safety Instructions". The printed
"Safety Instructions" are delivered with the product.
●Throughout the documentation, safety instructions are provided when you
need to take care during setup or operation.
1.1 Safety Instructions
Products from the Rohde & Schwarz group of companies are manufactured
according to the highest technical standards. To use the products safely, follow
the instructions provided here and in the product documentation. Keep the prod-
uct documentation nearby and offer it to other users.
Safety Instructions

Safety and regulatory information
R&S®NRX
6Getting Started 1424.7070.02 ─ 09
Use the product only for its intended use and within its performance limits. Inten-
ded use and limits are described in the product documentation such as the data
sheet, manuals and the printed "Safety Instructions". If you are unsure about the
appropriate use, contact Rohde & Schwarz customer service.
Using the product requires specialists or specially trained personnel. These users
also need sound knowledge of at least one of the languages in which the user
interfaces and the product documentation are available.
Never open the casing of the product. Only service personnel authorized by
Rohde & Schwarz are allowed to repair the product. If any part of the product is
damaged or broken, stop using the product. Contact Rohde & Schwarz customer
service at http://www.customersupport.rohde-schwarz.com.
Lifting and carrying the product
The maximum weight of the product is provided in the data sheet. To move the
product safely, you can use lifting or transporting equipment such as lift trucks
and forklifts. Follow the instructions provided by the equipment manufacturer.
Choosing the operating site
Only use the product indoors. The product casing is not waterproof. Water that
enters can electrically connect the casing with live parts, which can lead to elec-
tric shock, serious personal injury or death if you touch the casing. If
Rohde & Schwarz provides accessories designed for your product, e.g. a carrying
bag, you can use the product outdoors.
Unless otherwise specified, you can operate the product up to an altitude of
2000 m above sea level. The product is suitable for pollution degree 2 environ-
ments where nonconductive contamination can occur. For more information on
environmental conditions such as ambient temperature and humidity, see the
data sheet.
Setting up the product
Always place the product on a stable, flat and level surface with the bottom of the
product facing down. If the product is designed for different positions, secure the
product so that it cannot fall over.
If the product has foldable feet, always fold the feet completely in or out to ensure
stability. The feet can collapse if they are not folded out completely or if the prod-
uct is moved without lifting it. The foldable feet are designed to carry the weight of
the product, but not an extra load.
Safety Instructions

Safety and regulatory information
R&S®NRX
7Getting Started 1424.7070.02 ─ 09
If stacking is possible, keep in mind that a stack of products can fall over and
cause injury.
If you mount products in a rack, ensure that the rack has sufficient load capacity
and stability. Observe the specifications of the rack manufacturer. Always install
the products from the bottom shelf to the top shelf so that the rack stands
securely. Secure the product so that it cannot fall off the rack.
Connecting to power
The product is an overvoltage category II product. Connect the product to a fixed
installation used to supply energy-consuming equipment such as household
appliances and similar loads. Keep in mind that electrically powered products
have risks, such as electric shock, fire, personal injury or even death.
Take the following measures for your safety:
●Before switching on the product, ensure that the voltage and frequency indica-
ted on the product match the available power source. If the power adapter
does not adjust automatically, set the correct value and check the rating of the
fuse.
●Only use the power cable delivered with the product. It complies with country-
specific safety requirements. Only insert the plug into an outlet with protective
conductor terminal.
●Only use intact cables and route them carefully so that they cannot be dam-
aged. Check the power cables regularly to ensure that they are undamaged.
Also ensure that nobody can trip over loose cables.
●If the product needs an external power supply, use the power supply that is
delivered with the product or that is recommended in the product documenta-
tion or a power supply that conforms to the country-specific regulations.
●Only connect the product to a power source with a fuse protection of maxi-
mum 20 A.
●Ensure that you can disconnect the product from the power source at any
time. Pull the power plug to disconnect the product. The power plug must be
easily accessible. If the product is integrated into a system that does not meet
these requirements, provide an easily accessible circuit breaker at the system
level.
Cleaning the product
Use a dry, lint-free cloth to clean the product. When cleaning, keep in mind that
the casing is not waterproof. Do not use liquid cleaning agents.
Safety Instructions

Safety and regulatory information
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8Getting Started 1424.7070.02 ─ 09
Meaning of safety labels
Safety labels on the product warn against potential hazards.
Potential hazard
Read the product documentation to avoid personal injury or product damage.
Electrical hazard
Indicates live parts. Risk of electric shock, fire, personal injury or even death.
Hot surface
Do not touch. Risk of skin burns. Risk of fire.
Protective conductor terminal
Connect this terminal to a grounded external conductor or to protective ground. This
connection protects you against electric shock if an electric problem occurs.
1.2 Labels on the product
Labels on the casing inform about:
●Personal safety, see "Meaning of safety labels" on page 8
●Environment safety, see Table 1-1
●Identification of the product, see Chapter 5.2.7, "Name plate", on page 30.
Table 1-1: Labels regarding environment safety
Labeling in line with EN 50419 for disposal of electrical and electronic equipment after
the product has come to the end of its service life.
For more information, see the product user manual, chapter "Disposal".
1.3 Warning messages in the documentation
A warning message points out a risk or danger that you need to be aware of. The
signal word indicates the severity of the safety hazard and how likely it will occur
if you do not follow the safety precautions.
WARNING
Potentially hazardous situation. Could result in death or serious injury if not avoi-
ded.
Warning messages in the documentation

Safety and regulatory information
R&S®NRX
9Getting Started 1424.7070.02 ─ 09
CAUTION
Potentially hazardous situation. Could result in minor or moderate injury if not
avoided.
NOTICE
Potential risks of damage. Could result in damage to the supported product or to
other property.
1.4 Korea certification class B
이 기기는 가정용(B급) 전자파 적합기기로서 주로 가정에서 사용하는 것을 목적으
로 하며, 모든 지역에서 사용할 수 있습니다.
Korea certification class B

Documentation overview
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10Getting Started 1424.7070.02 ─ 09
2 Documentation overview
This section provides an overview of the R&S NRX user documentation. Unless
specified otherwise, you find the documents on the R&S NRX product page at:
www.rohde-schwarz.com/manual/NRX
2.1 Getting started manual
Introduces the R&S NRX and describes how to set up and start working with the
product. A printed version is delivered with the instrument.
2.2 User manual
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 with programming examples, and information on maintenance, instru-
ment interfaces and error messages. Includes the contents of the getting started
manual .
The user manual is provided on the R&S NRX for download under:
[System] > "Instrument Info" > "Help & Copyrights"
2.3 Instrument security procedures
Deals with security issues when working with the R&S NRX in secure areas. It is
available for download on the Internet.
2.4 Printed safety instructions
Provides safety information in many languages. The printed document is deliv-
ered with the product.
Printed safety instructions

Documentation overview
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11Getting Started 1424.7070.02 ─ 09
2.5 Data sheets and brochures
The data sheet contains the technical specifications of the R&S NRX. 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
characteristics.
See www.rohde-schwarz.com/brochure-datasheet/NRX
2.6 Release notes and open source acknowledg-
ment (OSA)
The release notes list new features, improvements and known issues of the cur-
rent firmware version.
The open source acknowledgment and the license texts of open source software
packages used in the R&S NRX software are provided under:
[System] > "Instrument Info" > "Help & Copyrights"
See www.rohde-schwarz.com/firmware/NRX
Release notes and open source acknowledgment (OSA)

Key features
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12Getting Started 1424.7070.02 ─ 09
3 Key features
The R&S NRX supports:
●Easy RF power measurements
●Multi-channel measurements
●RF pulse analysis
●System integration
The R&S NRX is a versatile, user-friendly base unit.
●Straightforward numerical and graphical display of measured values, plus
intuitive operation with touchscreen-based graphical user interface
●Supports up to four R&S NRP and R&S NRQ6 power sensors.
●Supports all sensor-dependent measurement functions
●Hardware interfaces for remote control and triggering
●Code emulation of the R&S NRP2
●Optional high-precision CW and pulse mode reference source module
●Optional power reflection measurements with R&S NRT‑Zxx directional power
sensors
See also the R&S NRX fact sheet at www.rohde-schwarz.com.

Preparing for use
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4 Preparing for use
Here, you can find basic information about setting up the product for the first time.
●Lifting and carrying..........................................................................................13
●Unpacking and checking................................................................................. 13
●Choosing the operating site............................................................................ 14
●Setting up the product..................................................................................... 14
●Considerations for test setup.......................................................................... 16
●Connecting to power....................................................................................... 17
●Connecting power sensors..............................................................................18
●Connecting USB and external devices............................................................21
●Switching on or off...........................................................................................21
4.1 Lifting and carrying
See "Lifting and carrying the product" on page 6.
The R&S NRX weighs below 3 kg, details are provided in the data sheet. Due to
the low weight, you can move the R&S NRX easily.
4.2 Unpacking and checking
1. Unpack the product carefully.
2. Retain the original packing material. Use it when transporting or shipping the
product later.
3. Using the delivery notes, check the equipment for completeness.
4. Check the equipment for damage.
If the delivery is incomplete or equipment is damaged, contact
Rohde & Schwarz.
Unpacking and checking

Preparing for use
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14Getting Started 1424.7070.02 ─ 09
4.3 Choosing the operating site
Specific operating conditions ensure proper operation and avoid damage to the
product and connected devices. For information on environmental conditions
such as ambient temperature and humidity, see the data sheet.
See also "Choosing the operating site" on page 6.
Electromagnetic compatibility classes
The electromagnetic compatibility (EMC) class indicates where you can operate
the product. The EMC class of the product is given in the data sheet under "Gen-
eral data".
●Class B equipment is suitable for use in:
– Residential environments
– Environments that are directly connected to a low-voltage supply network
that supplies residential buildings
●Class A equipment is intended for use in industrial environments. It can cause
radio disturbances in residential environments due to possible conducted and
radiated disturbances. It is therefore not suitable for class B environments.
If class A equipment causes radio disturbances, take appropriate measures to
eliminate them.
4.4 Setting up the product
See also:
●"Setting up the product" on page 6
●"Intended use" on page 5
4.4.1 Placing the product on a bench top
The R&S NRX is a small and lightweight product. You can stack the R&S NRX
with other products, but place the R&S NRX on top. In the following procedure,
the weight indication for stacking refers to the most common design of larger
Rohde & Schwarz instruments. Verify the load suitable for your product before
stacking.
Setting up the product

Preparing for use
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To place the product on a bench top
1. Place the product on a stable, flat and level surface. Ensure that the surface
can support the weight of the product. For information on the weight, see the
data sheet.
2. CAUTION! Foldable feet can collapse. See "Setting up the product"
on page 6.
Always fold the feet completely in or out. With folded-out feet, do not place
anything on top or underneath the product.
3. WARNING! A stack of products can fall over and cause injury. Never stack
more than three products on top of each other. Instead, mount them in a rack.
Stack as follows:
● If the products have foldable feet, fold them in completely.
● It is best if all products have the same dimensions (width and length). If the
products have different dimensions, stack according to size and place the
smallest product on top.
● Do not exceed the permissible total load placed on the product at the bot-
tom of the stack:
– 50 kg when stacking products of identical dimensions (left figure).
– 25 kg when stacking smaller products on top (middle figure).
Left = Stacked correctly, same dimensions
Middle = Stacked correctly, different dimensions
Right = Stacked incorrectly, too many products
4. NOTICE! Overheating can damage the product.
Prevent overheating as follows:
● Keep a minimum distance of 10 cm between the fan openings of the prod-
uct and any object in the vicinity.
Setting up the product

Preparing for use
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16Getting Started 1424.7070.02 ─ 09
● Do not place the product next to heat-generating equipment such as radia-
tors or other products.
4.4.2 Mounting the product in a rack
To prepare the rack
1. Observe the requirements and instructions in "Setting up the product"
on page 6.
2. NOTICE! Insufficient airflow can cause overheating and damage the product.
Design and implement an efficient ventilation concept for the rack.
To mount the product in a rack
1. Use an adapter kit to prepare the product for rack mounting.
a) Order the rack adapter kit designed for the product. For the order number,
see data sheet.
b) Mount the adapter kit. Follow the assembly instructions provided with the
adapter kit.
2. Grab the product by the handles and push it onto the shelf until the rack
brackets fit closely to the rack.
3. Tighten all screws on the rack brackets to secure the product in the rack.
To unmount the product from a rack
1. Loosen the screws at the rack brackets.
2. Remove the product from the rack.
3. If placing the product on a bench top again, unmount the adapter kit from the
product. Follow the instructions provided with the adapter kit.
4.5 Considerations for test setup
Cable selection and electromagnetic interference (EMI)
Electromagnetic interference (EMI) can affect the measurement results.
Considerations for test setup

Preparing for use
R&S®NRX
17Getting Started 1424.7070.02 ─ 09
To suppress electromagnetic radiation during operation:
●Use high-quality shielded cables, for example, double-shielded RF and LAN
cables.
●Always terminate open cable ends.
●Ensure that connected external devices comply with EMC regulations.
●Do not use USB connecting cables exceeding 5 m.
Preventing electrostatic discharge (ESD)
Electrostatic discharge is most likely to occur when you connect or disconnect a
DUT.
►NOTICE! Risk of electrostatic discharge. Electrostatic discharge can damage
the electronic components of the product and the device under test (DUT).
Ground yourself to prevent electrostatic discharge damage:
a) Use a wrist strap and cord to connect yourself to ground.
b) Use a conductive floor mat and heel strap combination.
4.6 Connecting to power
The R&S NRX can be used with different AC power voltages and adapts itself
automatically to them. Adjusting the R&S NRX to a particular AC supply voltage is
therefore not required. Refer to the data sheet for the requirements of voltage and
frequency.
For safety information, see "Connecting to power" on page 7.
1. Plug the AC power cable into the AC power connector on the rear panel of the
product. Only use the AC power cable delivered with the product.
2. Plug the AC power cable into a power outlet with ground contact.
The required ratings are listed next to the AC power connector and in the data
sheet.
Further information:
●Chapter 5.2.5, "AC supply and power switch", on page 29
Connecting to power

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4.7 Connecting power sensors
The R&S NRX supports a wide range of R&S power sensors. See the data sheet
for detailed information.
Depending on the power sensor, you have different choices for connecting power
sensors.
4.7.1 Sensor connectors A to D
See Chapter 5.1.1, "Sensor connectors A and B", on page 23 and Chap-
ter 5.2.8, "Sensor connectors C and D", on page 31.
Suitable for:
●R&S NRP power sensors: R&S NRP xxS/T/A USB and
R&S NRPxxSN/TN/AN LAN models
●R&S NRQ6
●R&S NRP‑Zxx power sensors
NRQ6
Frequency Selective Power Sensor
LAN PoE+
Host
Interface
Sample Clock I/O (Default: 120 MHz)
LO I/0
1
2
4
5 6
3
Figure 4-1: Setup with an R&S power sensor (example)
1 = Signal source
2 = R&S power sensor
3 = Host Interface connector
4 = R&S NRP‑ZK8
5 = Sensor connector of the R&S NRX
6 = R&S NRX
Use an R&S NRP‑ZK8 cable to connect an R&S power sensor to the R&S NRX.
If you use an R&S NRP‑ZK6 cable, the reference clock and trigger are not sup-
ported.
1. 8-pin female connector of R&S NRP‑ZK8:
a) Insert the screw-lock cable connector into the host interface of the
R&S power sensor.
Connecting power sensors

Preparing for use
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19Getting Started 1424.7070.02 ─ 09
b) Tighten the union nut manually.
2. 8-pin male connector of R&S NRP‑ZK8:
a) Insert this connector into one of the sensor ports of the R&S NRX.
3. Connect the RF connector of the R&S power sensor to the signal source. For
details, see the user manual of the R&S power sensor.
Note: Incorrectly connecting/disconnecting an R&S power sensor can dam-
age the power sensor or lead to erroneous results.
4.7.2 Optional interface for R&S NRT-Z sensors (R&S NRX-B9)
See Chapter 5.1.2, "Module bay", on page 24.
Suitable for R&S NRT‑Zxx directional power sensors.
Communication between the R&S NRT‑Zxx directional power sensor and a base
unit is only possible with a baud rate setting of 38400 Bd. This setting is the fac-
tory default that must be restored if the setting was changed. If the R&S NRT‑Zxx
directional power sensor is not recognized by the base unit, check that the baud
rate setting of the R&S NRT‑Zxx directional power sensor is 38400 Bd.
See the manual of the R&S NRT‑Zxx directional power sensor for details.
The arrow on the power sensor casing shows the forward power flow.
1
234
5
6
Figure 4-2: Connecting to source and load
1 = source
2 = port 1 (RF connector)
3 = R&S NRT‑Zxx directional power sensor
Connecting power sensors

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4 = port 2 (RF connector)
5 = load
6 = host interface connector
To connect the R&S NRT‑Zxx directional power sensor
Connect the R&S NRT‑Zxx directional power sensor between source and load of
your test setup as follows.
1. Connect RF connector (2, port 1) to the source.
a) Insert RF connector (2) straight into the RF connector of the source. Take
care not to tilt the R&S NRT‑Zxx directional power sensor.
b) Tighten the RF connector securely by hand.
2. Connect RF connector (4, port 2) to the load.
a) Insert RF connector (4) straight into the RF connector of the load. Take
care not to tilt the R&S NRT‑Zxx directional power sensor.
b) Tighten the RF connector tightly by hand.
During the measurement, the RF power flow can be high. Power leakage
has the risk of electric shock and severe skin burns.
3. Connect the host interface connector of the R&S NRT‑Zxx directional power
sensor (6) to the interface for R&S NRT-Z sensors (R&S NRX-B9).
To disconnect the R&S NRT‑Zxx directional power sensor
1. CAUTION! Risk of electric shock and severe skin burns. During the measure-
ment, the RF power flow can be high.
Switch off the RF power before touching the RF connectors.
2. Unscrew the RF connectors by hand.
3. Disconnect the cable of the R&S NRT‑Zxx directional power sensor (6) from
the interface for R&S NRT-Z sensors (R&S NRX-B9).
4.7.3 LAN interface
See Chapter 5.2.2, "Ethernet interface", on page 29.
Suitable for LAN power sensors.
Connecting power sensors