Pesquisa de Artigos e Documentos

English - 23 de nov. de 2021

Provides the information required to prepare the instrument for use and start working.

English - 11 de abr. de 2016

Describes the specific functions of the software.

English - 16 de jul. de 2018

English - 31 de jul. de 2018

Describes all instrument functions and remote control commands.

English - 28 de jun. de 2016

Critical Infrastructure: Mobile base stations rely on a complex interplay of components, including often-overlooked elements like filter combiners, RF splitters and tappers, and cables, to deliver uninterrupted mobile communications.Vulnerability to Environmental Factors: Filter combiners, accessories, and cabling in mobile base stations are susceptible to harsh environmental stressors, which can lead to signal degradation and reduced system availability.Fundamental Properties: The functional integrity of mobile base station components is measured against key RF parameters, including frequency response and insertion loss, to ensure conformance to manufacturer and industry standards (e.g., 3GPP, ETSI).Measurement Techniques: Systematic and comprehensive testing is essential to validate the functional integrity of critical mobile base station components, detect latent defects, and optimize overall system performance.

English - 9 de jan. de 2025

Two R&S®ETL TV analyzers or two R&S®ETC compact TV analyzers are used to measure the receive level of a car antenna against that of a reference antenna. The R&S®BCDRIVE broadcast drive test software exports measured data for display in Google Earth.

English - 19 de fev. de 2015

This application note describes how the transmitter landscape of a DVB-T2 single-frequency network (SFN) can be simulated in multiple input single output (MISO) mode in order to test the compatibility and performance of receiver modules. Neither an external T2-MI gateway nor a GPS receiver is required - just an R&S®BTC equipped with two RF paths. Alternatively, one R&S®SFU coupled with one or more R&S®SFU, R&S®SFE, R&S®SFE100 or R&S®SFC can also be used. R&S®ETL or R&S®ETC are suggested to fine-tune the synchronization between the generated RF signals.

English - 3 de fev. de 2014

The strict requirement of network synchronization is as old as digital cellular mobile networks. As soon as cells have a neighbor relationship, network synchronization is mandatory in both the frequency and time domains in order to ensure UE QoE and performance (Handover, MIMO, data throughput, etc.). This educational note describes how 5G NR with its extremely flexible specifications is affected by these synchronization requirements, and how it can be measured?

English - 17 de ago. de 2021

This application note describes how to use the mask and limit test features of the R&S®RTO, R&S®RTE and R&S®RTM Digital Oscilloscopes for EUT monitoring of signal forms, jitter etc. with the R&S®EMC32 Measurement Software. The mask test function allows autonomous characterization of digital signal integrity during EMS tests. R&S®EMC32 software records violations of userdefined limits or mask templates and evaluates the immunity threshold at frequencies of critical electromagnetic susceptibility.

English - 20 de abr. de 2015

This application note is one of three papers dealing with the WiMAX standard, covering the theoretical aspects of WiMAX. It gives a detailed overview of the basic concepts of WiMAX (FFT, OFDM, frame structures, etc) and explains the physical standard parts of IEEE 802.16 standards 802.16-2004, corr1 and 802.16e.Please see also 1MA97 for Generating and analyzing 802.16-2004 and 802.16e-2005 signals and 1EF57 for an introduction to the WiMAX standard.

English - 13 de jun. de 2006

A whole series of measurements has to be carried out for drafting an acceptance test report for a VHF sound broadcasting transmitter in compliance with ARD Specifications 5/3.1 (= TL 5820-3018 of the Deutsche Bundespost). As in most cases parameters like transmitter output power, frequency stability, spurious modulation, etc. have to be measured in the two stereo channels of the transmitter separately and at different modulation frequencies and frequency deviation, manual-controlled measurements are very time-consuming. In addition, a great variety of test equipment eg AF generator, stereodecoder, level meter, etc. is required for the measurements. FMAB with option FMA-B4 (AM/FM Calibrator / AF Generator) is ideally suitable for these measurements on VHF sound broadcasting receivers. The internal AF generator provides the signals required for the left and the right stereo channel. The MPX signal from the VHF transmitter is decoded by the built-in stereodecoder. As a result many of the tests and measurements required for the acceptance of VHF sound broadcasting receivers can be carried out without any additional test equipment being required. To give an example, a test program running under the graphics user interface Microsoft Windows has been developed for carrying out automatic power and modulation measurements via a PC.

English - 4 de jun. de 1998

For A/V devices such as smartphones, tablet PCs, Blu-ray players, set-top boxes and TV sets, the perceived video quality must satisfy very high standards. A/V devices need to hold their own in three main areas:ı Stability (environmental influences, response to source signal disturbances, etc.)ı Performance (switching times, delays)ı Compliance with standards (input and output formats)Any deviations from the expected video and audio output can be automatically and precisely detected with R&S A/V distortion analysis on all common analog and digital interfaces such as HDMI™ and MHL™.This document examines the relevant setups and configurations.

English - 15 de out. de 2014

Electric (EV) and hybrid electric (HEV) vehicles have both high-voltage (HV) and low-voltage (LV) electric systems. The LV systems are typically unshielded (infotainment, lighting, sensors etc.) and HV systems (battery packs, inverters, electric motors etc.) are shielded. The HV systems ranges from 400 V to 1500 V and the LV system ranges from 12 V to 48 V. The switching operations in HV systems can generate significant electromagnetic noise that may couple into the LV system and degrade performance or cause malfunctions.The HV/LV coupling tests, as defined in CISPR 25, specify the test setup in which HV systems are modified to inject electromagnetic disturbances at predefined levels, depending on the classification of the equipment under test (EUT). These tests also outline methods for measuring the coupling attenuation between HV and LV systems. Additionally, they define procedures for measuring conducted emissions (current and voltage) on LV systems during HV system operation. Furthermore, the standard includes methods to measure radiated noise (electric field) emissions generated when operating HV Systems. The HV/LV coupling tests are emission tests in line with CISPR 25 but some require an immunity test setup to inject disturbance into the system. This application note describes how to set up R&S®ELEKTRA and perform HV/LV coupling attenuation measurements.

English - 31 de jul. de 2025

Key points: Critical Infrastructure: Learn why the antenna system, as part of mobile base stations, is irreplaceable and demands meticulous attention due to its impact on network quality and availability.Vulnerability to Environmental Factors: Understand the challenges posed by weather conditions and environmental stresses on antenna systems, highlighting the importance of robust design and maintenance.Fundamental Properties: Delve into the core concepts of antenna systems, gaining insights into fundamental properties of antennas and the antenna cables.Measurement Techniques: Explore discontinuity or distance to fault measurements to identify reflections of forward RF energy due to impedance changes (connector, compression or kink of a cable, etc.).

English - 18 de jun. de 2024

The terrestrial television standard DVB T2 is gaining in significance as a result of the growing scarcity of available frequencies. New systems are being tested in many countries around the world. Other countries have already completed the introductory phase for DVB T2. Broadcasting transmitters are subject to particularly stringent standards with respect to broadcast signal quality, because even small faults can lead to service disruptions for many viewers or even disrupt adjacent channels.A single instrument, the R&S®ETL TV analyzer, performs all required DVB-T2 transmitter measurements, from the initial acceptance testing for the transmitter, to measurements performed during commissioning and preventive maintenance.The measurements described here satisfy many country-specific and customer-specific test specifications. Users need only set the limit values accordingly.

English - 23 de jul. de 2014

For measurements of non-connectorized devices, test fixtures, probes or other structures are used to adapt from the coaxial interface of the test setup to the device under test (DUT). For accurate measurements of the DUT, these lead-ins and lead-outs need to be characterized, so that their effects can be mathematically removed, i.e. de-embedded from the measurement results.This application note provides practical hints to accurately characterize and de-embed these lead-in and lead-out structures with R&S Vector Network Analyzers ZNA, ZNB, ZNBT and ZND. As de-embedding is also essential in other test equipment like oscilloscopes, etc., this guide also describes, how lead-ins and lead-outs can be accurately characterized with a VNA and then exported as an S-Parameter file to be used by other test instruments.

English - 19 de set. de 2022

The evolution of mobile communication enters 5G New Radio (NR) era with pivotal features. Voice call service is however still considered as an indispensable element for mobile devices and worldwide network operators continue to maintain the voice service for their subscribers. In comparison to other Over-the-Top (OTT) voice services, such as WhatsApp©, Teams© etc., Voice over NR (VoNR) and Voice over LTE (VoLTE) maintain QoS, support well established handover mechanism and emergency call, and do not require to pre-install OTT app on the phone.In order to provide premium voice service and enhance the superb user experience, audio tests on mobile devices are essential before the product launch. Different audio test aspects among which acoustic, functional, performance and field tests need to be considered.This application note describes the performance test with focus on VoNR audio quality measurement via electrical interface of the mobile device. The test solution is based on R&S®CMX500 with its integrated POLQA algorithm.

English - 26 de jul. de 2023

The R&S®ESW-B8 and R&S®ESW-B8E extended bandwidth options allow the R&S®ESW EMI test receiver to measure with a resolution bandwidth of up to 80 MHz. The increasing number of wideband applications (e.g. radar sensors) and accompanying standards means there is now a greater interest in wide bandwidth measurements.This application note describes the following topics for the R&S®ESW EMI test receiver:► Characteristics and implementation of RF signal paths► Image responses and how their rejection is handled ► Ultrawideband measurement applications as required e.g. by ETSI standards► Solutions for efficiently coping with bandwidth limitations in the range above 8 GHz

English - 19 de nov. de 2020

More and more everyday items such as household appliances, vehicles, lights, etc. are now connected to the Internet, forming what is known as the "Internet of Things". Even clothing with sewn-in sensors to measure vital functions can now connect to the Internet and transmit data to cloud services. These different things use a variety of wireless technology standards to establish a connection. Due to its popularity, one of the most important standards is Bluetooth (or Bluetooth Low Energy). Before a new product with Bluetooth functionality can be launched, the qualification process defined by the Bluetooth SIG must be successfully completed. To save time and money, performance tests need to be performed in the development stage. This application note describes how to use the R&S CMW platform to perform the measurements defined in Bluetooth test specification version 5. As an alternative solution, we also cover how to perform almost all of the measurements with a spectrum analyzer and signal generator.The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Rohde & Schwarz is under license.

English - 19 de jun. de 2017

The UWB (Ultra-Wideband) technology is a short range wide-band radio technology specified for device to device communication operating in unlicensed spectrum. It is an RF positioning technology that enables accurate and secure peer-to-peer ranging between mobile devices with robust resistance to interference while consuming very low energy and coexisting well with other radio communication systems. UWB is used for a variety of different applications, such as asset tracking, secure payment, personal tracker, real time location services and keyless access and start of a vehicle etc. According to ABI Research forecasts, there will be well over 1 billion UWB annual device shipments by 2026. Almost every smart phone shipped in 2026 will support UWB services.Talking about testing aspect of a UWB device, in general two test methodologies can be adopted as other wireless products, either the traditional testing mode (so-called conducted test mode) with wired RF connection between the test measurement equipment and device under test (DUT) or over the air (OTA) test mode in an OTA anechoic chamber. Sometimes, it is not always possible or necessary to perform the tests under conducted mode due to the limiting factors, e.g. cost, space, complexity and direct access to the RF connectors of the product. In this case, OTA testing is then becoming a non-evitable approach. Moreover, OTA testing reflects the usage of DUT in a real condition.In this application note, R&S® OTA test solution covering transmitter (Tx), receiver (Rx) and Time of Flight (ToF) testing in Wireless Automated Testing (WMT) environment is described. The measurement results throughout the whole document are based on NXP Trimension™ NCJ29D5 UWB automotive IC.

English - 12 de abr. de 2023

5G New Radio (NR) is a radio technology specified by 3GPP and was first released in 3GPP release 15. It is designed to target three use cases, i.e. enhanced mobile broadband (eMBB), massive machine type communication (mMTC) and ultra-reliable low latency communication (URLLC). Among these three use cases, eMBB represents actually a further evolution of mobile broadband communication from LTE standard. According to the technical performance requirement defined by IMT-2020, by deploying 5G technology, peak data rates of eMBB application are expected to reach 20 Gbps in downlink (DL) and 10 Gbps in uplink (UL) direction, respectively. Typical use cases of eMBB are data hungry applications, such as high resolution 8K video streaming, virtual reality (VR), augmented reality (AR) etc.Verification of a 5G capable user equipment (UE) with respect to its achievable maximum data throughput under controllable and deterministic test conditions is an essential process during the design phase of the product. Performance centric verification through identification of the data throughput bottleneck, product benchmarking against a golden device enhances tremendously the user experience in the end.This document focuses on 5G NR frequency range 1 (FR1) with TDD duplex mode in E-UTRAN New-radio Dual Connectivity (ENDC) operating mode. As 5G NR physical layer offers a plethora of flexibility, the motivation here is to provide a kind of guideline of relevant parameter settings to stimulate device under test (DUT)'s max throughput capacity. The status quo of the R&S solutions at the time when the application note is created are described. Shown feature sets are constantly evolving, so the screenshots used and the parameters shown may change.

English - 7 de jul. de 2022