Search Application Notes & Cards
Learn how to configure Rohde & Schwarz products to fit your application. Search our database by product, technology, or application to find relevant technical documents.
Search Application Notes & Cards
Learn how to configure Rohde & Schwarz products to fit your application. Search our database by product, technology, or application to find relevant technical documents.
1108 Results
Secure interconnection of ATC voice networks
11-Mar-2019
Getting EMI emissions under control is one of those tasks that R&D engineers do not enjoy doing . EMI must often be taken into consideration as early as the design phase, particularly in the case of power electronics systems with increasing switching speeds of wideband gap semiconductors. While EMI receivers or spectrum analyzers are always the preferred choice for these measurements, they are often not available as standard measurement equipment in the R&D lab. To allow optimization early on in the R&D lab, Rohde & Schwarz provides a free tool to simplify conducted emissions debugging using oscilloscopes.
27-Sep-2021 | AN-No. 1SL372
The measurement of error vector magnitude (EVM) is relative – but what is the reference?
02-Mar-2020
DVB-T can be used for stationary, portable and – using the diversity technique – also mobile reception. Stationary reception via a Gaussian channel and a fixed Yagi antenna on the roof usually poses no problems. This is different with portable reception, for example on a park bench, if there are moving objects in the vicinity of the receiver that has been put up for optimal reception. These may be persons or any kind of vehicles that – while passing by the receiver - generate different types of reflections. With mobile reception, for example when driving on a motorway, poor receiving conditions have the most detrimental effect. Receiving conditions can be considerably improved by employing several antennas, a technique that is referred to as antenna diversity. This application note discusses the improvements that can be achieved with antenna diversity and explains how to simulate a DVB-T channel with the required characteristics by means of TV Test Transmitter R&S SFQ.
31-Jul-2003 | AN-No. 7BM06
Rare faults and intermittent signals are difficult to capture. The R&S®RTO Oscilloscope supports the acquisition and the detailed signal analysis of these signals by using the history mode. The history mode allows the user to look back to previous acquisitions and apply the wide set of analysis functions of the RTO. Furthermore it stores the accurate recoding time of the waveforms for subsequent analysis.
03-Jun-2013 | AN-No. 1TD02
Blocking test, WLAN, Wi-Fi, RF device, performance limit Customize blocking tests and make sure to address parameters like frequency positions, levels or bandwidths when verifying RF device performance. Verifying RF device performance with a blocking test Blocking test, WLAN, Wi-Fi, RF device, performance limit Customize blocking tests and make sure to address parameters like frequency positions, levels
31-Oct-2019
This application note presents the Jitter analysis capabilities of the R&S®RTO for digital signals. It demonstrates the basic operation with an application example, and shows the associated jitter analysis.
29-Aug-2013 | AN-No. 1TD03
This application note describes remote operation or monitoring of the real time spectrum analyzer R&S® FSVR through a standard web browser. The common cross-platform technology Virtual Network Computing (VNC) is used as a server on the instrument.
27-Jul-2010 | AN-No. 1EF74
This application note gives a short summary on the Allan variance as a measure of frequency stability and an example on how to calculate it, with measurement results from R&S spectrum analyzers. A software program to sample data from R&S spectrum analyzers and calculate the Allan variance is available.
11-Feb-2009 | AN-No. 1EF69
Widespread adoption of higher order modulation schemes, larger signal bandwidths and higher operating frequencies, to enable higher data throughput in communication links like 5G, places increasingly tough demands on the frontend. Signal fidelity is often enhanced with linearization.The greater number of RF chains and signal bandwidth in 5G Frontends mean that DPD (Digital Pre-Distortion) may no longer be the default linearization choice; 5G Frontends will be completely different from their 4G predecessors.The key metrics of Efficiency, Linearity, Bandwidth and Output Power remain, as does the question of how to optimally create the signal with just enough fidelity and power, with a minimum of wasted power. The solution set to that question, however, has never been greater.Amongst other topics, this White Paper, (i) proposes a classification of Linearization schemes, (ii) introduces the hard limiter, (iii) illustrates linearization of an exemplary mmWave PA using non-DPD techniques, and (iv) introduces a class of linearized transmitters that create their signal and linearity from efficiently generated components.
25-Feb-2016 | AN-No. 1MA269
The new R&S®DATA-NPT mobile network performance test from Rohde & Schwarz brings innovation to network performance testing. The patent-pending testing solution is a very compact and resource-saving implementation of a new measurement procedure that simultaneously measures the maximum data capacity and the minimum continuous connectivity in a mobile network.
21-Apr-2016
The LTE technology as specified within 3GPP Release 8 was first commercially deployed by end 2009. Since then the number of operators implementing the technology is strongly increasing around the globe. LTE has become the fastest developing mobile system technology. The same way GSM and WCDMA have been enhanced with additional features over time, LTE is continuously worked on. Initial enhancements have been included in 3GPP Release 9 and are described in this white paper.
19-Dec-2011 | AN-No. 1MA191
Spectrum that was previously reserved for TV broadcasting is being freed up in many countries for use under the new Long Term Evolution (LTE) mobile radio standard (keyword: 'digital dividend'). As a result, numerous coexistence scenarios are possible. So network operators and manufacturers from both the mobile radio and the broadcast sector have a vital interest in avoiding any interference and performing in-depth testing of their products. Rohde & Schwarz offers a wideranging product portfolio for such applications. This Application Note presents Test & Measurement equipment for the broadcast and mobile radio sector and discusses some possible test setups.
08-Dec-2011 | AN-No. 1MA176
Even with the introduction of HSDPA and HSUPA, evolution of UMTS has not reached its end. To ensure the competitiveness of UMTS for the next 10 years and beyond, UMTS Long Term Evolution (LTE) is being specified in 3GPP release 8. LTE, which is also known as Evolved UTRA and Evolved UTRAN, provides new physical layer concepts and protocol architecture for UMTS. This application note introduces LTE technology and testing aspects.
14-Sep-2009 | AN-No. 1MA111
This white paper describes the POLQA® algorithm implemented in the R&S®UPV Audio Analyzer and shows an example hardware setup for standard independent audio measurements.
30-May-2012 | AN-No. 1MA202
This white paper summarizes significant additional technology components based on LTE, which are included in 3GPP Release 12 specifications. The LTE technology as specified within 3GPP Release 8 was first commercially deployed by end 2009. Since then the number of commercial networks is strongly increasing around the globe. LTE has become the fastest developing mobile system technology ever. As other cellular technologies LTE is continuously worked on in terms of improvements. 3GPP groups added technology components according to so called releases. Initial enhancements were included in 3GPP Release 9, followed by more significant improvements in 3GPP Release 10, also known as LTE-Advanced. Beyond Release 10 a number of different market terms have been used. However 3GPP reaffirmed that the naming for the technology family and its evolution continues to be covered by the term LTE-Advanced. Therefore LTE-Advanced remains the correct description for specifications defined from Release 10 onwards, including 3GPP Release 12.
04-Aug-2015 | AN-No. 1MA252
This whitepaper provides an overview of the WLAN offload in LTE as standardized by 3GPP, as well as the enhancements for Wi-Fi standardized by IEEE and the Wi-Fi Alliance. It also describes access methods in the joint network, treats the security, and describes IP mobility. In addition network discovery and selection are explained.
10-Dec-2012 | AN-No. 1MA214
Data rates in the range of several Gigabit/s are needed to transmit signals like uncompressed video signals. Amendment 802.11ad to the WLAN standard defines the MAC and PHY layers for very high throughput (VHT) in the 60 GHz range. The specification 802.11-2016 has defined additional modulation and codings schemes for the 11ad single carrier part to increase the data rate. The OFDM part is obsolete.This white paper provides an introduction to the technology behind 802.11ad and highlights the test and measurement requirements.
21-Nov-2013 | AN-No. 1MA220
The LTE technology as specified within 3GPP Release 8 was first commercially deployed by end 2009. Since then the number of commercial networks is strongly increasing around the globe. LTE has become the fastest developing mobile system technology. As other cellular technologies LTE is continuously worked on in terms of improvements. 3GPP groups added technology components into so called releases. Initial enhancements were included in 3GPP Release 9, followed by more significant improvements in 3GPP Release 10, also known as LTE-Advanced. Beyond Release 10 a number of different market terms have been used. However 3GPP reaffirmed that the naming for the technology family and its evolution continues to be covered by the term LTE-Advanced. I.e. LTE-Advanced remains the correct description for specifications defined from Release 10 onwards, including 3GPP Release 12. This white paper summarizes improvements specified in 3GPP Release 11.
09-Jul-2013 | AN-No. 1MA232
LTE Location Based Services (LBS) involve the process of determining where a device is located. Global Navigation Satellite System (GNSS) based solutions are highly accurate and the technology of choice for absolute position accuracy, providing the device has a good line-of-sight, but this is not always the case. A device can be in a highly dense urban environment with reduced satellite visibility or indoors with very low signal levels.These limitations of GNSS systems have meant that LTE cellular based alternatives have been developed within 3GPP Release 9 and onwards.They are described in this white paper.
29-May-2015 | AN-No. 1SP05
Joint solutions of R&S® and COMPRION®
The GSMA specified a global standard for remote provisioning and management of the embedded Universal Integrated Circuit Card (eUICC) in the machine-to-machine (M2M) environment as well as the consumer devices via Over the Air (OTA) methodology.This application note describes GSMA compliant remote eUICC provisioning test solution based on R&S® CMW500/CMW290/CMX500 and COMPRION® eUICC Profile Manager software tool. Moreover, an eUICC provisioning method for GSMA Security Accreditation Scheme (SAS) compliant consumer devices by adopting COMPRION® eSIM Test Profile Service is introduced which is essential for RF, protocol testing on R&S®CMW500/CMW290/CMX500 for eSIM capable consumer devices.
03-Jun-2020 | AN-No. GFM342
This application note explains how to detect, characterize, find and document interferers in cellular networks using the R&S®FSH spectrum analyzer.First it explains how to use the spectrum and interference analysis functions during each step of interference hunting. It also illustrates the explanations with a common interferer example. Then it points out the most common interference sources in cellular networks and gives tips on how to identify them.
21-Oct-2014 | AN-No. 1EF89
3GPP Release 9 Technical Specification (TS) 37.141 covers multistandard radio base station conformance testing. Multistandard radio includes four standards of mobile communications: GSM, WCDMA, TD-SCDMA, and LTE. This application note introduces the concept of multistandard radio base stations as well as solutions for transmitter and receiver tests based on Rohde & Schwarz signal generators and Rohde & Schwarz signal and spectrum analyzers.
06-Jul-2012 | AN-No. 1MA198
Frequency converters e.g. in satellite transponders need to be characterized not only in terms of amplitude transmission but also in terms of phase transmission or group delay, especially with the transition to digital modulation schemes. They often do not provide access to the internal local oscillators This application note describes a method using the R&S ZVA to measure group delay of mixers and frequency converters with an embedded local oscillator very accurately. The key aspect of this new technique is, that the network analyzer applies a 2-tone signal to the frequency converter. By measuring the phase differences between the two signals at the input and at the output, it calculates group delay and relative phase between output and input.
27-Aug-2012 | AN-No. 1EZ60
This Application Note focuses on measurement of harmonics using modern spectrum analyzers. It highlights the source of harmonics before focusing on their measurement using a spectrum analyzer. The Application Note also explains the benefits of the R&S FSW’s high pass filter option for harmonic measurements.
02-Mar-2012 | AN-No. 1EF78
This application note shows how to perform LTE terminal block error rate (BLER) and throughput tests under fading conditions with the R&S®CMW500 Protocol Tester and the R&S®AMU200A Fading Simulator.
27-Mar-2012 | AN-No. 1MA177
radiated conformance testing according to TS 38.141-2, Rel. 16
3GPP defines the Radio Frequency (RF) conformance test methods and requirements for 5G NR Base Stations (BS) in the technical specifications TS 38.141. This application note describes all mandatory radiated RF transmitter tests (TS 38.141-2, chapter 6), according to Release 16.Furthermore, this document provides a brief introduction about the different R&S OTA antenna test solutions and how they are applicable for base station conformance testing. Rohde & Schwarz offers solutions for any test case that is mentioned in this application note.
20-Dec-2019 | AN-No. GFM324
Multiple input multiple output (MIMO) technology is an integral part of 3GPP E-UTRA long term evolution (LTE). As part of MIMO, beamforming is also used in LTE. This white paper discusses the basics of beamforming and explains the ten downlink and two uplink MIMO transmission modes in LTE Release 12.
10-Jul-2015 | AN-No. 1MA186
This document describes the typical measurements performed on mixers and how they can be implemented on the ZVA Vector Network Analyzer with the ZVA-K4 Frequency Conversion option. The document describes the concept and setups required to perform Conversion Loss, Isolation, Intermodulation and Reflection measurements.
06-May-2009 | AN-No. 1EZ58