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  • Generating the Noise Field for Ambient Noise Rejection Tests

    This application note describes how to generate the noise field for ambient noise rejection tests according to 3GPP TS 26.132, sections 7.9 and 8.9.

  • Psychoacoustic Audio Quality Measurements Using R&S®UPV Audio Analyzer

    This application note gives background information about the psychoacoustic measurements PESQ® (Perceptual Evaluation of Speech Quality) and PEAQ® (Perceptual Evaluation of Audio Quality). It also describes how to perform these measurements using the Rohde & Schwarz Audio Analyzer.

  • Measurements on GSM Base Stations According to Rec. 11.20

    The following application note describes the function and operation of user menus for FSE Spectrum Analyzers including option Vector Signal Analysis (FSE-B7). For measurements according to the GSM standard user menus are provided, which perform settings on FSE for Base Station testing required in the standard. The menu and the accompanying setups are stored on a floppy disk. For operation of the menus firmware version 1.40 or higher is required. Option Vector Signal Analysis FSE-B7 has to be installed for the use of the application menu.

  • Measurement of Maximum Sound Pressure Level of Headphones according to EN50332

    This application note explains how to use the Audio Analyzer R&S UPV for measurements of maximum sound pressure level of headphones according to EN50332. It is possible to measure a combination of music player / FM receiver and headphones, the maximum output voltage of a player / FM receiver alone or the wideband characteristic voltage of headphones alone. An application program is available for download as installer file and as VB.NET project.

  • PESQ® Measurement for GSM with R&S®CMUgo

    Recent mobile test methods could not evaluate the quality of data reduced speech signals with different coded and decoded signals. The Perceptual Evaluation of Speech Quality (PESQ) provides the solution for this measuring problem. GSM PESQ is an add-on tool for CMUgo for automatic measurement of the PESQ for GSM mobile phones according to recommendation ITU-T P.862.1 featuring selectable fading profiles, frequency hopping sequences and variable Additional White Gaussian Noise (AWGN).

  • Converting Existing Waveform Files from R&S®AMIQ or Binary into R&S®SMU200A or R&S®AFQ100A Format

    This application note describes how to use the Rohde & Schwarz software tool ‘RsBatchConvert.exe’ for the conversion of binary data or WinIQSIM generated AMIQ waveforms into the new waveform format. The tool not only rescales I/Q data contained in the file but also changes the K-option requirement from WinIQSIM Kxx to the new WinIQSIM2 K2xx options. Thus, new instruments with installed K2xx options may be used to continue using existing waveform files.

  • Calibrating the CMD Output Level for BER

    The CMD 57/59 output level for BER measurement can be calibrated to high accuracy to match GSM 11.21, (with modulated signals and adjacent timeslots + 50 dB above the used timeslot) using a simple test setup containing an NRVD power meter and an FSE spectrum analyzer.

  • GSM Mobile Tests under Conditions of Fading

    GSM standard 11.10 prescribes a number of tests requiring measurements on mobile stations under multichannel conditions (fading). The combination of Radiocommunication Tester CRTP02 or CRTC02 and Signal Generator SMIQ allows cost-effective performance of the most important fading tests, in particular the tests according to sections 13.2, 14.2 and 14.3 of GSM 11.10. The aim of this application note is to familiarize the user with all the capabilities offered by the above combination of measuring instruments. The user should then be able to quickly generate and run his own fading tests using the IEC/IEEE-bus control commands described in this application note. To facilitate reading of the following, the testers CRTP02 and CRTC02 are referred to as CRTx.

  • Using the R&S®FSW for Efficient Measurements on Multi- Standard Radio Base Stations

    This application notes introduces the Multi-Standard Radio Analyzer function of the R&S®FSW and shows how it performs the measurement on multi-standard radio transmitters. It reveals interactions caused by the coexistence of signals of different cellular standards and localizes the root cause. With an example of a base station signal consisting of three radio access technologies (GSM/WCDMA/LTE FDD) it shows how easy interactions can be found. The R&S®FSW is the ideal tool for trouble shooting tasks with its combination of a large bandwidth and the versatile Multi-Standard Radio Analyzer in one measurement instrument.

  • Measuring Multistandard Radio Base Stations

    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.

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