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Rohde & Schwarz outs high-end vector signal generator

Posted: 30 Apr 2013 ?? ?Print Version ?Bookmark and Share

Keywords:vector signal generator? LTE-Advanced? WLAN? TD-SCDMA?

Rohde & Schwarz has announced what it says is a high-end vector signal generator that combines maximum flexibility, outstanding performance and intuitive operation to outperform all comparable solutions available on the market. According to the company, the R&S SMW200A can generate complex, digitally modulated signals of high quality that target applications from single-path vector signal generator to multi-channel MIMO receiver tester.

The vector signal generator combines a baseband generator, RF generator and MIMO fading simulator in a single instrument. The vector signal generator covers the frequency range from 100kHz to 3GHz or 6GHz and features an I/Q modulation bandwidth of 160MHz with internal baseband. Exceptional modulation and RF characteristics make it ideal for developing high-end components, modules and complete products for wideband communications systems such as LTE-Advanced and WLAN IEEE 802.11ac, stated the firm. The generator performs especially well when it comes to the verification of 3G and 4G base stations as well as aerospace and defence applications, Rohde & Schwarz added.

The R&S SMW200A can be equipped with an optional second RF path for frequencies up to 6GHz and with a maximum of two baseband and four fading simulator modules, giving users two full-featured vector signal generators in a single unit. Fading scenarios such as 2x2 MIMO, 8x2 MIMO for TD-LTE and 2x2 MIMO for LTE-Advanced carrier aggregation can also be simulated.

More than two RF sources are required for applications such as 3x3 MIMO for WLAN or 4x4 MIMO for LTE-FDD. In addition to the two internal RF paths provided, highly compact R&S SGS100A signal generator modules can be connected as additional RF sources and remotely controlled by the R&S SMW200A. This solution takes up only five height units for 4x4 MIMO receiver tests and provides correctly encoded baseband signals, realtime channel simulation, AWGN generation and, if required, phase-locked coupling of multiple RF paths.

Options for every important digital communications standard are available from the start: LTE, LTE-Advanced, 3GPP FDD/HSPA/HSPA+, GSM/EDGE/EDGE Evolution, TD-SCDMA, CDMA2000/1xEV-DO and WLAN IEEE 802.11a/b/g/n/ac. The standards run directly on the R&S SMW200A without having to connect an external PC, making it possible to vary signals or specific parameters quickly and easily. This simplifies troubleshooting on the DUT and also saves time, indicated the firm. The R&S SMW200A also allows developers to even create scenarios using different signals with minimal effort, for example, in order to test multi-standard radio base stations.

Additionally, the R&S SMW200A ensures high accuracy in spectral and modulation measurements. The SSB phase noise is -139dBc (typ.) at 1GHz (20kHz offset). In terms of modulation quality, the R&S SMW200A scores top marks with an EVM of -49dB (meas.) for WLAN IEEE 802.11ac signals as well as a 0.05dB (meas.) I/Q modulation frequency response over 160MHz bandwidth.

The R&S SMW200A features a touchscreen that allows users to control the instrument even more intuitively with the Rohde & Schwarz block diagram as key operating element to visualise the signal flow. Help functions are provided to quickly achieve success. Presets are provided for all important digital standards and fading scenarios. LTE and UMTS test case wizards simplify complex base station conformance testing in line with the 3GPP specification.

The R&S SMW200A vector signal generator is available.

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