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  • HSDPA - Challenges for UE Power Amplifier Design

    This Application Note describes the HSDPA uplink channel structure. Challenges for UE power amplifier design are outlined, and guidelines how to use R&S measurement equipment for testing UE power amplifiers are provided. An outlook on High Speed Uplink Packet Access (HSUPA) and the impact of HSUPA on the uplink channel structure is given.

  • Higher Order MIMO Testing with the R&S®SMW200A Vector Signal Generator

    Due to its outstanding performance the R&S®SMW200A vector signal generator is ideal for testing MIMO receivers in a vast variety of applications offering maximum usability at minimum form factor. It can generate up to eight antenna signals simultaneously in its digital baseband – all standard-compliant and with antenna-specific coding. In addition, it can simulate the complete MIMO transmission channel with up to 32 fading channels, sufficient to emulate higher-order MIMO configurations such as 3x3, 4x4, and 8x4.This application note explains how to use the SMW for testing higher order MIMO systems by presenting different key applications.

  • HSUPA RF Measurements with the R&S®CMW500 in line with 3GPP TS 34.121

    Most of the tests specified in the 3GPP standard TS 34.121 [1] Release 6 (Rel-6) can be performed with the R&S®CMW500. This document provides a step-by-step guide on how to use a stand-alone R&S®CMW500 to take Rel-6 measurements on transmitter characteristics and execute performance tests according to TS 34.121 V9.7.0, clauses 5 and 10. Test cases that require fading simulation can also be carried out with the aid of a standalone R&S®CMW500 that has been configured with a built-in fading simulator option. That greatly reduces test setup complexity. Furthermore, the R&S®CMW500's wizard enables easy configuration of the test setup for various HSUPA subtests as specified by TS34.121 [1]. The procedure detailing how the wizard is used is also explained for each test case. The test cases mentioned in this application note are carried out using Rel-6 user equipment (UE) that supports Operating Band I and Power Class 3.

  • Testing Speech Quality of Mobile Phones in a Live Network

    This application note provides an application program and instructions for performing speech quality tests and delay measurements in a live network, using the R&S®UPV audio analyzer.

  • R&S®SMW200A - Test Case Wizard for Base Station Conformance Tests

    Application Video

  • dB Calculator

    30 dBm + 30 dBm = 60 dBm? It is well known that it is not as easy as that.This application note supplies a free of charge software tool that can be used to add or subtract an arbitrary number of powers. In addition, the software can be used to convert power and voltage units from the linear to the logarithmic scale (and vice versa), convert linear power and voltage ratios to decibels, and convert a VSWR to other reflection quantities.

  • Calibration Tool for PESQ Speech Quality Tests

    PESQ measurements employ a level adaptation algorithm and are hence widely insensitive to absolute level. However, if the tests are performed via a speech codec, the driving level of the codec has an influence on the MOS result. Therefore careful alignment of the level is required. This application note provides an application program which runs on the Audio Analyzer R&S UPV or R&S UPV66 and can be used to calibrate signal levels for the PESQ measurement.

  • Fast Scalar Network Analysis Using a Signal Generator and a Power Meter

    This document presents a simple procedure for network analysis that is more cost-effective than the use of scalar network analyzers. It allows the accurate measurement of the transmission characteristics of filters, amplifiers and frequency converters over a large frequency and dynamic range. In order to reach very high measurement speeds, Rohde & Schwarz signal generators are operated in 'List Mode', and Rohde & Schwarz power meters are operated in 'Buffered Mode.' The required programming for the signal gene­rator and the power meter is illustrated by excerpts from a Visual Basic program which is available, free of charge, upon request.

  • Remote Setup for 3G High Dynamic Multi Charrier Signals with SMIQ03HD and FSU / FSQ

    Testing multi carrier power amplifiers of the 3rd Generation requires test signals with a high dynamic range. This application note describes how a 4 carrier 3G WCDMA signal can be generated and measured with the application software SET_MC4. The software sets up to 4 SMIQ03HDs to generate the signal, and an FSU or FSQ to immediately evaluate and analyze the Adjacent Channel Leakage Ratio (ACLR) of the power amplifier. The setups are controlled remotely. The SET_MC4 source code is also included. Modify the code to meet your individual requirements or adopt the IEEE-commands into your own setup script.

  • 3GPP Receiver Test Under Fading Conditions With CMU and SMIQ.

    This application note describes how to generate 3GPP (UTRA-FDD) signals for receiver tests under fading conditions for user equipment. The test setup requires an R&S®CMU200 Universal Radio Communication Tester with option R&S®CMU-B17 IQ-IF interface and an R&S®SMIQ Vector Signal Generator. The test setup can be calibrated with either a R&S®NRP-Zx USB power sensor or an NRP, NRVD, or NRVS Power Meter. To calibrate the baseband and RF path and configure performance tests according to the 3GPP test specification 34.121 easily, the program 3GFadLevCor is included.

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