Miscellaneous White Papers & Articles from R&S

A host of useful articles, whitepapers, information, & webinars, etc from Rohde & Schwarz


Focus on Test from R&S Includes:
Introduction to Focus on Test     Oscilloscopes     5G mobile communications test     Power meters     EMC / EMI test     Signal generators     Wireless & IoT     Miscellany    


New Type of RF Power Meter

Traditional RF power meters are small and accurate, but they are not very sensitive and have a limited dynamic range. Measurement receivers score well in both disciplines but have disadvantages of their own. Rohde & Schwarz has created a revolutionary new sensor type that combines the strong points of both types of instruments.

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Safe debugging of embedded power supplies

Embedded power supplies combine traditional power supply components with multiple sensors, processing and control logic as well as digital communications interfaces. Test equipment for debugging requires isolated input channels for measurements of hazardous voltages. Additional digital channels support the analysis of digital signals, while trigger and decode capabilities are essential for time-correlated monitoring of serial protocol-based communications interfaces. These requirements are not always easily met, so find out how to test these supplies in the best manner.

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Passive Antenna Measurement and Nearfield – Farfield Transformation

One of the key areas of interest with 5G is that of mmWave communications. The antennas will be a key element for this and measuring an optimising performance is key. This application note describes how to measure the antenna pattern of a mm-Wave device in the R&S®ATS1000 shielded chamber. This includes the required calibration of the measurement setup and a possible near field to far field transformation when measuring larger devices. Find out more . . .

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Comparison of jitter measurements in the time and frequency domain

When analyzing the robustness of data transmission systems, jitter is a key indicator. It is recommended to use jitter measurement instruments for both the time and frequency domain in order to differentiate between fast and slow moving artifacts. Jitter measurements are not always easy, so this paper provides some very useful insights. Read more . . .

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Remote Emulation with the R&S®SMA100B Signal Generator

The R&S SMA100B signal generator offers a remote emulation feature that makes it possible to control the instrument by commands other than the built-in native SCPI commands. This feature allows the user to replace signal generators, e.g. from other manufacturers, with the R&S SMA100B without having to change the remote control code. This feature can be particularly useful when needing to replace a generator to improve performance, to use a generator that is already available, or to use a new generator because the older one is no longer supported.

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Measuring the Power Quality in Electrical Installations

Power quality is a key aspect of many power installations. Power quality measurements characterise the degree to which a practical supply resembles the ideal situation, in terms of harmonic pollution, reactive power and load imbalance. These measurements can be undertaken using an oscilloscope. Find out more . . .

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GNSS receiver testing in accordance to RED 2014/53/EU Article 3.2

What is different when testing GNSS receivers? Currently, the bands adjacent to GNSS frequencies are not used by high-power signals, and there is no legislation on receiver performance. Therefore GNSS receivers are highly susceptible to interference, and this does not just apply tot he low cost models. As a result, regulatory authorities cannot assign the bands adjacent to the GNSS bands to other services, such as mobile broadband services, and this contradicts the goal of efficient spectrum usage. Find out more about GNSS receiver testing.

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Battery life measurements in the connected car

Battery life is a major concern for any portable or mobile device. Automotive applications are now different. As complex applications are added to the connected car, it becomes increasingly important to understand how cellular and non-cellular wireless connections consume power. For example, modules such as those defined for eCall/ERA-Glonass are expected to continue transmitting after a crash for a defined period of time, and telematics units need to regularly attach to the cellular network and may even be required to download a large firmware update over a cellular connection when the car’s engine isn’t running. Find out more . . .

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Testing the IP connection security of telematics units

The security of any item on a vehicle is key to its overall security. On device on the vehicle that lets in a hacker is of huge concern and as a result security testing is very important. A considerable number of vehicles will be connected to the Internet using non-cellular technology such as WLAN or a cellular network such as LTE/LTE-A. Whatever route is provided for external connectivity, the security must be rigorously tested. Find out more . . .

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RF Testing on Automotive Infotainment Devices

Automotive infotainment has come a very long way in recent years. What used to be the car radio has evolved from adding a cassette player to state of the art entertainment on the move. Now infotainment is far more complicated enabling mobile phones to be connected, music devices, SatNav and many more items. The RF testing these can present a real challenge. Find out how to effectively test these systems . . .

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Automotive Radar Sensors - RF Signal Analysis and Inference Tests

Road safety is a global challenge at present and will be in the future. Automotive radar has become a keyword in this area and pushes again a step forward to increase driving comfort, crash prevention and even automated driving. To ensure that any radar systems perform to the required standard they must be tested thoroughly before they are used. Find out more . . . .

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Comparison of jitter measurements in the time and frequency domain

Jitter on a signal is of major importance for systems transmitting data. It is recommended to use jitter measurement instruments for both the time and frequency domain in order to differentiate between fast and slow moving artifacts. Read more . . .

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Group Delay Measurements with Signal and Spectrum Analyzers

Phase distortions in a transmission channel need to be as low as possible to maintain good signal quality, especially with phase based data modulation schemes. Accordingly it is necessary to measure the performance of systems and this is often achieved using group delay measurements. Vector network analyzers are normally used to characterize the group delay variations as a measure of phase distortion. Find out how this can be achieved along with some key practical aspects of making successful measurements.

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Characterizing Active Phased Array Antennas

Designing and implementing an active phased array antenna requires precise characterization of individual components and the integrated performance of the array. To ensure an accurate test of the intended adaptive nature of the active phased array antenna, the embedded algorithms need to be tested as well. Find out about the test procedures and read about recommendations for the characterization of the relevant parameters for active phased array antennas and their passive subsystem, as often used in applications for Mobile Communication and RADAR. Read more . . . .

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