Rohde & Schwarz NRT2 User manual

R&S®NRT2
Power Reflection Meter
User Manual
1178555002
Version 04
(;ÜÅÀ2)

This manual describes the R&S®NRT2 (1430.0509K02) with firmware version FW 02.31 and later.
In addition to the base unit, the following options are described:
●R&S®NRT2-B8 (1430.0105K02)
© 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.
1178.5550.02 | Version 04 | R&S®NRT2
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®NRT2 is indicated as
R&S NRT2.

Contents
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3User Manual 1178.5550.02 ─ 04
Contents
1 Safety and regulatory information........................................................9
1.1 Safety Instructions........................................................................................................9
1.2 Labels on the product.................................................................................................11
1.3 Warning messages in the documentation................................................................ 12
1.4 Korea Certification Class B........................................................................................12
2 Welcome............................................................................................... 13
2.1 Documentation Overview........................................................................................... 13
2.1.1 Getting Started Manual................................................................................................. 13
2.1.2 User Manual..................................................................................................................13
2.1.3 Instrument Security Procedures....................................................................................13
2.1.4 Printed Safety Instructions............................................................................................ 13
2.1.5 Data Sheets and Brochures.......................................................................................... 13
2.1.6 Release Notes and Open Source Acknowledgment (OSA).......................................... 14
2.2 Key Features................................................................................................................14
3 Getting Started..................................................................................... 15
3.1 Preparing for Use........................................................................................................ 15
3.1.1 Lifting and Carrying....................................................................................................... 15
3.1.2 Unpacking and Checking.............................................................................................. 15
3.1.3 Choosing the Operating Site......................................................................................... 15
3.1.4 Setting Up the Product.................................................................................................. 16
3.1.4.1 Placing the Product on a Bench Top............................................................................. 16
3.1.4.2 Mounting the Product in a Rack.................................................................................... 17
3.1.5 Considerations for Test Setup....................................................................................... 18
3.1.6 Connecting to Power.....................................................................................................18
3.1.7 Connecting to LAN........................................................................................................ 19
3.1.8 Connecting Power Sensors...........................................................................................19
3.1.8.1 NRT Sensor Connector.................................................................................................19
3.1.8.2 USB 2.0 Host Interfaces................................................................................................20
3.1.9 Connecting USB and External Devices.........................................................................20
3.1.10 Switching On or Off....................................................................................................... 21
3.2 Instrument Tour...........................................................................................................22

Contents
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4User Manual 1178.5550.02 ─ 04
3.2.1 Front Panel Tour............................................................................................................22
3.2.1.1 NRT Sensor...................................................................................................................22
3.2.1.2 Touchscreen..................................................................................................................22
3.2.1.3 Keys.............................................................................................................................. 23
3.2.1.4 USB Host Interface....................................................................................................... 24
3.2.1.5 On/Standby Key............................................................................................................ 25
3.2.2 Rear Panel Tour............................................................................................................ 25
3.2.2.1 Trig In / Out 2 and Out 1 / Trig Out Connectors............................................................ 25
3.2.2.2 Ethernet Interface..........................................................................................................26
3.2.2.3 USB Device Interface....................................................................................................26
3.2.2.4 USB Host Interface....................................................................................................... 26
3.2.2.5 AC Supply and Power Switch....................................................................................... 26
3.2.2.6 IEC 625/IEEE 488 Interface.......................................................................................... 26
3.2.2.7 Name Plate................................................................................................................... 27
4 Operating Concepts.............................................................................28
4.1 Manual Operation........................................................................................................28
4.1.1 Main Measurement Dialog............................................................................................ 28
4.1.1.1 Measurement Pane.......................................................................................................29
4.1.2 Status Information......................................................................................................... 30
4.1.3 Notification Center.........................................................................................................31
4.1.4 Editing Parameters........................................................................................................33
4.1.5 Creating and Saving Screenshots.................................................................................33
4.2 Remote Operation....................................................................................................... 34
4.3 Remote Control........................................................................................................... 35
4.3.1 Switching to Remote Control (REMOTE)......................................................................36
4.3.2 Returning to Manual Operation (LOCAL)......................................................................36
5 Measurement and Display Configuration.......................................... 37
5.1 Main Measurement Dialog..........................................................................................37
5.2 Measurement Overview.............................................................................................. 43
5.3 Measurement Main Configuration Dialog................................................................. 44
5.4 Controlling the Measurement.................................................................................... 45
5.5 Triggering.....................................................................................................................46
5.5.1 Trigger States................................................................................................................46

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5.5.2 Trigger Sources.............................................................................................................46
5.5.3 Trigger Settings.............................................................................................................47
5.6 Measurement Representation....................................................................................47
6 Sensor Configuration.......................................................................... 51
6.1 Mode Settings..............................................................................................................51
6.2 Correction Settings.....................................................................................................53
6.3 Sensor Frequency.......................................................................................................55
6.4 Filter Settings.............................................................................................................. 56
7 Saving and Recalling Settings............................................................58
8 Zeroing Sensors...................................................................................60
9 System Settings................................................................................... 62
9.1 Connections................................................................................................................ 62
9.1.1 Network Settings........................................................................................................... 63
9.1.2 Remote Settings............................................................................................................66
9.1.3 Input/Output Settings (I/O)............................................................................................ 69
9.1.4 Sensor Manager............................................................................................................71
9.2 Instrument Info............................................................................................................ 74
9.2.1 System Info................................................................................................................... 74
9.2.2 Security Settings........................................................................................................... 77
9.2.3 Option Settings..............................................................................................................80
9.2.4 Open Source Licenses..................................................................................................82
9.3 Hardware Configuration............................................................................................. 82
9.4 Test............................................................................................................................... 83
9.5 Global Settings............................................................................................................84
10 Firmware Update..................................................................................86
10.1 Firmware Update via PC and USB or Ethernet Connection.................................... 86
10.1.1 Hardware and Software Requirements......................................................................... 86
10.1.2 Preparing an Update..................................................................................................... 87
10.1.3 Updating the Application Firmware............................................................................... 88
10.2 Firmware Update via a USB Flash Memory Stick.....................................................91
10.2.1 Hardware and Software Requirements......................................................................... 91
10.2.2 Preparing an Update..................................................................................................... 91

Contents
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10.2.3 Updating the Application Firmware............................................................................... 92
11 Remote Control.................................................................................... 93
11.1 Notation for SCPI Commands....................................................................................93
11.2 Status Reporting System........................................................................................... 94
11.2.1 Hierarchy of the Status Registers................................................................................. 94
11.2.2 Structure of a SCPI Status Register..............................................................................95
11.2.3 Status Byte (STB) and Service Request Enable Register (SRE)..................................97
11.2.4 IST Flag and Parallel Poll Enable Register (PPE)........................................................ 98
11.2.5 Questionable Status Register....................................................................................... 98
11.2.6 Standard Event Status and Enable Register (ESR, ESE).............................................99
11.2.7 Operation Status Register...........................................................................................100
11.3 Common Commands................................................................................................ 101
11.4 CALCulate.................................................................................................................. 110
11.5 CALibration................................................................................................................131
11.6 DIAGnostic.................................................................................................................131
11.7 FORMat...................................................................................................................... 132
11.8 FREQuency................................................................................................................132
11.9 INPut...........................................................................................................................133
11.10 MMEMory................................................................................................................... 134
11.11 OUTPut.......................................................................................................................143
11.12 SENSe........................................................................................................................ 148
11.13 SERVice......................................................................................................................162
11.14 STATus....................................................................................................................... 162
11.15 SYSTem...................................................................................................................... 166
11.16 TEST........................................................................................................................... 184
11.17 TRIGGER....................................................................................................................185
11.18 UNIT............................................................................................................................187
12 Troubleshooting................................................................................. 190
12.1 Displaying Information............................................................................................. 190
12.2 Notifications.............................................................................................................. 190
12.2.1 Interpreting Notifications and Their Number............................................................... 190
12.2.1.1 System Notifications....................................................................................................191
12.2.1.2 Power Sensor Notifications......................................................................................... 192

Contents
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12.2.1.3 License Key Notifications............................................................................................ 192
12.2.1.4 Queue Handling Notifications......................................................................................192
12.3 Performing Tests.......................................................................................................192
12.4 Collecting Information for Technical Support........................................................ 193
12.5 Contacting Customer Support.................................................................................193
13 Transporting....................................................................................... 194
14 Maintenance, Storage and Disposal.................................................195
14.1 Cleaning..................................................................................................................... 195
14.2 Storage.......................................................................................................................195
14.3 Disposal..................................................................................................................... 195
Glossary: List of Abbreviations........................................................196
List of commands.............................................................................. 198
Index....................................................................................................204

Contents
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8User Manual 1178.5550.02 ─ 04

Safety and regulatory information
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1 Safety and regulatory information
The product documentation helps you use the product safely and efficiently. Follow the
instructions provided here and in the following chapters.
Intended use
Combined with a supported R&S NRT‑Zxx directional power sensor, the R&S NRT2
base unit is intended for power and reflection measurements in development and for
monitoring and maintenance purposes. The supported R&S NRT‑Zxx directional power
sensors are listed in the data sheet. Observe the operating conditions and perfor-
mance limits stated in the data sheet.
Target audience
The target audience is developers and technicians. The required skills and experience
in power and reflection measurements depend on the used operating concept. While
manual operation is suitable for beginners, remote control requires expertise in power
and reflection measurements.
Main applications are continuous monitoring of transmitter systems and power mea-
surements with digital modulation. A profound 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 dan-
gers 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 9. The same information is provi-
ded 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 product documentation
nearby and offer it to other users.
Use the product only for its intended use and within its performance limits. Intended
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.
Safety Instructions

Safety and regulatory information
R&S®NRT2
10User Manual 1178.5550.02 ─ 04
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 dam-
aged 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. Fol-
low 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 electric 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 environments where
nonconductive contamination can occur. For more information on environmental condi-
tions 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 prod-
uct 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 sta-
bility. The feet can collapse if they are not folded out completely or if the product is
moved without lifting it. The foldable feet are designed to carry the weight of the prod-
uct, but not an extra load.
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 prod-
ucts 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 applian-
ces and similar loads. Keep in mind that electrically powered products have risks, such
as electric shock, fire, personal injury or even death.
Safety Instructions

Safety and regulatory information
R&S®NRT2
11User Manual 1178.5550.02 ─ 04
Take the following measures for your safety:
●Before switching on the product, ensure that the voltage and frequency indicated
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-spe-
cific safety requirements. Only insert the plug into an outlet with protective conduc-
tor terminal.
●Only use intact cables and route them carefully so that they cannot be damaged.
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 deliv-
ered with the product or that is recommended in the product documentation or a
power supply that conforms to the country-specific regulations.
●Only connect the product to a power source with a fuse protection of maximum
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.
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 connec-
tion 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 11
Labels on the product

Safety and regulatory information
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12User Manual 1178.5550.02 ─ 04
●Environment safety, see Table 1-1
●Identification of the product, see Chapter 3.2.2.7, "Name Plate", on page 27.
Table 1-1: Labels regarding environment safety
Labeling in line with EN 50419 for disposal of electrical and electronic equipment after the prod-
uct has come to the end of its service life.
For more information, see "Disposing electrical and electronic equipment" on page 195.
1.3 Warning messages in the documentation
A warning message points out a risk or danger that you need to be aware of. The sig-
nal 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 avoided.
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 목적으로 하
며, 모든 지역에서 사용할 수 있습니다.
Korea Certification Class B

Welcome
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13User Manual 1178.5550.02 ─ 04
2 Welcome
This chapter provides an overview of the user documentation and an introduction to
the R&S NRT2.
2.1 Documentation Overview
This section provides an overview of the R&S NRT2 user documentation. Unless
specified otherwise, you find the documents on the R&S NRT2 product page at:
www.rohde-schwarz.com/manual/NRT2
2.1.1 Getting Started Manual
Introduces the R&S NRT2 and describes how to set up and start working with the prod-
uct. A printed version is delivered with the instrument.
2.1.2 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, instrument interfaces
and error messages. Includes the contents of the getting started manual .
2.1.3 Instrument Security Procedures
Deals with security issues when working with the R&S NRT2 in secure areas. It is
available for download on the Internet.
2.1.4 Printed Safety Instructions
Provides safety information in many languages. The printed document is delivered with
the product.
2.1.5 Data Sheets and Brochures
The data sheet contains the technical specifications of the R&S NRT2. 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.
See www.rohde-schwarz.com/brochure-datasheet/NRT2
Documentation Overview

Welcome
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14User Manual 1178.5550.02 ─ 04
2.1.6 Release Notes and Open Source Acknowledgment (OSA)
The release notes list new features, improvements and known issues of the current
firmware version.
The open source acknowledgment and the license texts of open source software pack-
ages used in the R&S NRT2 software are provided under:
[System] > "Instrument Info" > "Open Source Options"
For further details, see Chapter 9.2.4, "Open Source Licenses", on page 82.
See www.rohde-schwarz.com/firmware/NRT2
2.2 Key Features
Directional power measurements, measuring forward and reverse power under operat-
ing conditions, are required when installing, servicing and monitoring transmitters,
antennas and RF generators. The compact R&S NRT2 power reflection meter sup-
ports all the measurement functions of the R&S NRT‑Zxx directional power sensors.
Thanks to the wide range of measurement functions and high accuracy, you can use
them in research, development and production.
The large, user-friendly touchscreen simultaneously displays the forward and reverse
power. The base unit is exceptionally easy and intuitive to use and can be remotely
controlled via LAN, GPIB (GPIB/IEEE488 Interface (R&S NRT2-B8)) or USB.
Key facts:
●Simultaneous display of forward and reverse power
●Measurement of average power, average burst power, peak power, crest factor,
CCDF and mismatch
●5" color touchscreen
●Direct operation of the R&S NRT‑Zxx directional power sensors from a PC
●Frequency-range from 25 MHz to 4 GHz (sensor-dependent)
Key Features

Getting Started
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15User Manual 1178.5550.02 ─ 04
3 Getting Started
3.1 Preparing for Use
Here, you can find basic information about setting up the product for the first time.
●Lifting and Carrying.................................................................................................15
●Unpacking and Checking........................................................................................ 15
●Choosing the Operating Site...................................................................................15
●Setting Up the Product............................................................................................16
●Considerations for Test Setup.................................................................................18
●Connecting to Power...............................................................................................18
●Connecting to LAN..................................................................................................19
●Connecting Power Sensors.....................................................................................19
●Connecting USB and External Devices...................................................................20
●Switching On or Off.................................................................................................21
3.1.1 Lifting and Carrying
See "Lifting and carrying the product" on page 10.
The R&S NRT2 weighs below 3 kg, details are provided in the data sheet. Due to the
low weight, you can move the R&S NRT2 easily.
3.1.2 Unpacking and Checking
1. Unpack the product carefully.
2. Retain the original packing material. Use it when transporting or shipping the prod-
uct 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.
3.1.3 Choosing the Operating Site
Specific operating conditions ensure proper operation and avoid damage to the prod-
uct and connected devices. For information on environmental conditions such as ambi-
ent temperature and humidity, see the data sheet.
See also "Choosing the operating site" on page 10.
Preparing for Use

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16User Manual 1178.5550.02 ─ 04
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 "General 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 radi-
ated disturbances. It is therefore not suitable for class B environments.
If class A equipment causes radio disturbances, take appropriate measures to
eliminate them.
3.1.4 Setting Up the Product
See also:
●"Setting up the product" on page 10
●"Intended use" on page 9
3.1.4.1 Placing the Product on a Bench Top
The R&S NRT2 is a small and lightweight product. You can stack the R&S NRT2 with
other products, but place the R&S NRT2 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.
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 10.
Always fold the feet completely in or out. With folded-out feet, do not place any-
thing 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 bottom of
the stack:
– 50 kg when stacking products of identical dimensions (left figure).
Preparing for Use

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17User Manual 1178.5550.02 ─ 04
– 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 product
and any object in the vicinity.
● Do not place the product next to heat-generating equipment such as radiators
or other products.
3.1.4.2 Mounting the Product in a Rack
To prepare the rack
1. Observe the requirements and instructions in "Setting up the product" on page 10.
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.
Preparing for Use

Getting Started
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18User Manual 1178.5550.02 ─ 04
2. Remove the product from the rack.
3. If placing the product on a bench top again, unmount the adapter kit from the prod-
uct. Follow the instructions provided with the adapter kit.
3.1.5 Considerations for Test Setup
Cable selection and electromagnetic interference (EMI)
Electromagnetic interference (EMI) can affect the measurement results.
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.
3.1.6 Connecting to Power
The R&S NRT2 can be used with different AC power voltages and adapts itself auto-
matically to them. Adjusting the R&S NRT2 to a particular AC supply voltage is there-
fore not required. Refer to the data sheet for the requirements of voltage and fre-
quency.
For safety information, see "Connecting to power" on page 10.
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 3.2.2.5, "AC Supply and Power Switch", on page 26
Preparing for Use

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3.1.7 Connecting to LAN
See Chapter 9.1.1, "Network Settings", on page 63.
3.1.8 Connecting Power Sensors
The R&S NRT2 supports the R&S NRT‑Zxx directional power sensors listed in the data
sheet. You have two choices for connecting the power sensors, but only one measure-
ment at a time is possible.
3.1.8.1 NRT Sensor Connector
See Figure 3-2.
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 factory 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 3-1: Connecting to source and load
1 = source
2 = port 1 (RF connector)
3 = R&S NRT‑Zxx directional power sensor
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.
Preparing for Use

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20User Manual 1178.5550.02 ─ 04
1. CAUTION! Risk of electric shock and severe skin burns. During the measurement,
the RF power flow can be high. Connect both RF connectors tightly to avoid power
leakage.
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 securely by hand.
3. Connect the host interface connector of the R&S NRT‑Zxx directional power sensor
(6) to the NRT sensor connector.
To disconnect the R&S NRT‑Zxx directional power sensor
1. CAUTION! Risk of electric shock and severe skin burns. During the measurement,
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
NRT sensor connector.
3.1.8.2 USB 2.0 Host Interfaces
See Figure 3-2 and Chapter 3.2.2.4, "USB Host Interface", on page 26.
1. Connect the R&S NRT‑Z5 USB interface adapter to the R&S NRT‑Zxx power sen-
sor.
2. Connect the USB connector of the adapter to the R&S NRT2.
3. Connect the R&S NRT‑Zxx power sensor between source and load. See Chap-
ter 3.1.8.1, "NRT Sensor Connector", on page 19.
3.1.9 Connecting USB and External Devices
Apart from connecting power sensors, you can use the USB interfaces to connect USB
devices. You can increase the number of connected devices by using USB hubs.
Due to the large number of available USB devices, there is almost no limit to the possi-
ble expansions. In the following, useful USB devices are listed exemplarily:
●Memory stick for easy transfer of data to/from a computer (e.g. firmware updates).
●Mouse if you prefer this way of operation over a touchscreen.
Preparing for Use