R&S®SMW200A Vector Signal Generator

The fine art of signal generation

For all your needs

Versatile configuration
Thanks to its modular design, the R&S®SMW200A can be equipped with the exact options required for a specific application. Any configuration is possible, from a classic single-path vector signal generator to a multichannel MIMO receiver tester. The generator can be equipped with a maximum of two internal baseband modules and four fading simulator modules. It is also possible to install a second 3 GHz or 6 GHz RF path. This concept yields two full-featured vector signal generators in a single unit, so that even complex signal scenarios (e.g. wanted signal + interferer, dual cell, TX/RX diversity) can be created easily.

Ideal for MIMO, MSR or LTE-Advanced applications
And that is by far not all. The capabilities of the R&S®SMW200A surpass those of two conventional generators combined. When the instrument is fully equipped, the baseband section provides up to eight independent signal sources and up to 16 logical faders. This makes the R&S®SMW200A ideal for MIMO and other complex applications encountered in LTE‑Advanced (carrier aggregation), HSPA (dual carrier) and multistandard radio, etc.

Modular architecture for optimal adaptation to the application at hand
Almost all options of the R&S®SMW200A can be retrofitted, most of them simply via key code. Starting from the basic configuration as a classic single-path vector signal generator, the R&S®SMW200A can be customized as required for any application. Users only have to purchase what they currently need and are free to decide on upgrades according to their future requirements.

Configuration example 1: A single-path R&S®SMW200A with internal baseband can be used for measurements on components or for fundamental receiver testing
Configuration example 2: A two-path R&S®SMW200A is ideal for receiver and performancetests on base stations. One generator can generate wanted signal plus interferer (in this example, a wanted LTE signal and a 3GPP FDD interferer).
Configuration example 3: A fully equipped R&S®SMW200A with MIMO option covers all key MIMO scenarios, such as 8x2 shown in the screenshot. In this case, the baseband section provides eight signal sources and 16 “logical” faders, i.e. MIMO channels.
Simplify your setup

A vector signal generator needs a powerful baseband section to meet the requirements of advanced communications systems. The R&S®SMW200A sets standards in this field too. Each of the two available standard baseband modules contains a realtime coder and an arbitrary waveform generator with max. 1 Gsample memory depth. The bandwidth of up to 160 MHz covers modern digital standards, such as LTE‑Advanced and WLAN IEEE 802.11ac, as well as wideband multicarrier or multistandard radio signals.

The baseband signals can be digitally added, provided with a frequency offset of max. ±80 MHz and varied in power and phase relative to each other. This makes it incredibly simple to generate multicarrier scenarios and combinations of different digital standards with the R&S®SMW200A.

A single two-path R&S®SMW200A is all that is needed to create the wanted signal plus interferer scenarios often required in receiver testing. Depending on the scenario's overall bandwidth and the desired level difference between wanted signal and interferer, the signals can in many cases be output by using only one RF path. The second RF path is available for other tasks, e.g. generation of an additional CW interferer.

If one of the two RF paths is equipped with a 12.75 GHz frequency option, then only a single instrument is needed for out-of-band blocking measurements. An additional microwave signal generator is no longer required.

Advanced multichannel signal generation
The R&S®SMW200A generator’s advanced baseband architecture enables it to simulate even complex scenarios.Up to eight internal baseband sources make it easy to generate multiple signals required, for example, for LTE carrier aggregation, multicell/multi-user simulation, interference testing or multistandard radio (MSR) tests. Optional fading and noise simulation for each of the eight individual channels is also possible. Flexible routing capabilities and internal realtime addition of the baseband signals allow a parallelized testing approach.

All signals are generated with their own periodicity. This allows the simultaneous generation of multiple carriers with nontruncated data sequences and enables a DUT to perform demodulation tests for each of the signals at the same time. As a result, the overall test time is reduced and only a minimum of hardware investment is needed.

Wideband baseband and vector signal generator in one box
As an alternative, the R&S®SMW200A can be equipped with a dedicated wideband baseband section that extends the internal RF modulation bandwidth to 2 GHz. This option makes the R&S®SMW200A the first vector signal generator to offer a fully calibrated wideband solution up to 40 GHz in a single device.
One or two baseband generators can be installed in one instrument, which makes it possible to generate two independent wideband signals up to 20 GHz with any type of modulation using a single device.

The R&S®SMW200A is the ideal generator for multistandard radio tests. In this example, it is generating signals for a receiver intermodulation test in line with 3GPP TS37.141. The two wanted signals are generated with basebands A and B and output at RF A. The two interferers (basebands C and D) are available at RF B.

Ready for future technologies: 5G and IEEE 802.11ad
The R&S®SMW200A is the ideal tool for every engineer who develops components, devices or infrastructure for the next generation of mobile communications. Potential 5G candidate signals such as FBMC, UFMC, GFDM or f‑OFDM are directly created on the instrument, helping users to efficiently master their design challenges. Typical test scenarios such as co-existence tests with LTE or wideband 5G signal generation in the microwave range are covered by a single instrument. WLAN IEEE 802.11ad signals with a symbol rate of 1.76 Gsample/s in single carrier mode are supported as well. Due to its intelligent internal modulation frequency response compensation, the R&S®SMW200A also excels in I/Q flatness and modulation quality for all wideband signals.

Support of all important digital standards
The R&S®SMW200A uses software options to generate signals for all important digital standards, particularly LTE/LTE-Advanced (up to Release 12), 3GPP FDD/ HSPA/HSPA+, GSM/EDGE/EDGE Evolution and WLAN IEEE802.11a/b/g/n/j/p/ac/ad.

For more information on the digital standards in the R&S®SMW200A, go to the pages of the respective options via the Options tab of this page.

In contrast to many other solutions on the market, the signals for the digital standards can be configured and generated directly on the R&S®SMW200A. Because the software options integrate seamlessly into the instrument’s firmware, there is no need for additional PC software. This simplifies operation and also saves valuable testing time, since no time-consuming waveform transfer from the external PC software to the signal generator's output memory has to be performed.

Bring reality to your lab

Advanced, state-of-the-art channel emulation
The internal fading simulator option is another element that distinguishes the R&S®SMW200A from other RF vector signal generators. Using latest FPGA technology the hardware was designed for exceptional compactness so that up to four of the powerful fading modules can be installed. These modules can simultaneously emulate as many as 32 fading channels. The maximum fading bandwidth is 160 MHz. As a result, the R&S®SMW200A can realistically map even higher-order MIMO scenarios such as 3x3 MIMO for WLAN IEEE 802.11.

For more information on the fading capabilities of the R&S®SMW200A, go to the page describing the R&S®SMW-B14 option via options tab of this page.

Prestigious discipline: MIMO
All modern wireless communications standards utilize MIMO technology to increase the effective data throughput. A test generator must be able to simulate MIMO scenarios exactly as they are present at the receive antennas of a receiver – even with complex MIMO receivers. This is where the multipath and fading capabilities of the R&S®SMW200A come into their own. The built-in baseband modules allow the simultaneous generation of up to eight signals. For MIMO scenarios, the signals from all transmit antennas – with antenna-specific coding – can be directly generated in a single instrument.

In addition, the R&S®SMW200A is able to simulate the entire MIMO channel. Up to 32 logical faders cover all key MIMO scenarios such as 3x3, 4x4, 8x4 and 4x8. The user can also set the correlations between the propagation paths. Multistandard setups, such as simultaneous 2x2 MIMO for LTE and 3GPP FDD HSPA, are possible as well. Furthermore, carrier aggregation scenarios with four LTE component carriers (each with 2x2 MIMO) can be simulated with a single instrument. No matter how complicated the application – the R&S®SMW200A handles unique stimulus generation and channel simulation in parallel.

Block diagram of the R&S®SMW200A configured for the simultaneous generation of dual cell HSPA and 2x2 MIMO for LTE with correlated fading channels.

The R&S®SMW200A can be equipped with one or two internal RF paths. If necessary, more RF paths can be added: Two additional I/Q-modulated R&S®SGT100A signal generator modules turn the R&S®SMW200A into an extremely compact 4x4 MIMO complete solution. Adding another four R&S®SGT100A modules enhances the solution to cover even 4x8 or 2x4x4 MIMO scenarios. The additional hardware is operated and remotely controlled directly from the R&S®SMW200A.

4x4 MIMO setup, consisting of a two-path R&S®SMW200A and two R&S®SGS100A signal generator modules operated from the R&S®SMW200A. The modules provide RF paths 3 and 4. The R&S®SMW200A fully performs baseband signal generation and fading.

For more information on the MIMO capabilities of the R&S®SMW200A, go to the page describing the R&S®SMW-K74 option via the Options tab of this page.

Make your device even better

Excellent signal quality
Testing high-performance DUTs requires a signal generator solution that features significantly better RF characteristics than the DUT itself. Otherwise, the measurement results might be falsified by the signal generator. The R&S®SMW200A fully meets this requirement, enabling the DUT’s entire potential to be utilized.

Exceptional modulation characteristics
The R&S®SMW200A features a wideband I/Q modulator with up to 2 GHz RF bandwidth. With this bandwidth, it covers practically all applications in its frequency range, including wireless and satellite communications, radar, research and education. The internal baseband makes it possible to generate signals with a maximum width of 2 GHz. State-of-the-art D/A converters and an excellent RF chain ensure exceptional modulation characteristics. All in all, a modulation frequency response of ®SMW200A generates 1.76 GHz wide WLAN IEEE802.11ad signals (MCS12 at an IF of 15 GHz) with an EVM of –34 dB (meas.). Other signal types such as WCDMA, LTE and 5G candidate signals, wideband QAM-modulated carriers or chirped pulses as well as multicarrier CW scenarios can also be output with highest quality

Measured I/Q modulation frequency response with internal baseband
The R&S®SMW200A generates 160 MHz wide WLAN IEEE 802.11ac signals with an EVM of - 49 dB (meas.).

Very good RF characteristics
The RF characteristics of the R&S®SMW200A are simply impressive. The absolute level accuracy is better than 0.5 dB (f ≤ 3 GHz) across the entire specified level range from –120 dBm to +18 dBm, without additional options being required. Frequency and level setting times of 600 μs (typ.) via IEC/IEEE bus make the R&S®SMW200A the fastest high-end vector signal generator on the market and help save valuable time. Thanks to its excellent pulse modulator with on/off ratio > 80 dB and rise/fall time < 10 ns, the R&S®SMW200A is ideal for generating pulsed signals for radar applications. The high-end synthesizer, which is included in the standard version of the R&S®SMW200A, already delivers exceptional SSB phase noise and nonharmonics values. The R&S®SMW-B22 option improves performance even more. The R&S®SMW200A is therefore perfect for measurements that place high requirements on spectral purity.

Measured SSB phase noise with R&S®SMW-B22 option
Measured SSB phase noise, standard performance
Speed up your development

Increasing cost pressure results in ever shorter development cycles. At the same time, testing requirements become more stringent. The R&S®SMW200A accomplishes complex measurement tasks quickly and efficiently. Numerous innovations in intuitive user guidance make work extremely easy.

Ergonomic design for maximum operating convenience
A high-resolution touchscreen and an easy-to-use graphical user interface make for ergonomic operation. A block diagram provides a clear overview at all times. The user sees at a glance the signal flow and the status of all inputs and outputs. The drag & drop functionality makes signal flow reconfiguration simpler than ever. For MIMO and other complex applications, the block diagram is adapted to the prevailing signal scenario.

User interface of the R&S®SMW200A. The header shows the frequency, level and important instrument statuses. The footer provides quick access to open menus. The generated signals and the measurement results of any connected R&S®NRP-Zxx power sensor(s) can be displayed as well (second field from left in footer).

All menus feature tabs for fast access to signal parameters. A context-sensitive online help system provides information about every parameter, such as setting range, detailed circuit description and SCPI command. Various functions facilitate everyday work, e.g. each parameter can be individually reset to its specific preset status.

The sophisticated help system of the R&S®SMW200A offers useful additional functions for every parameter, e.g. a specific preset or the associated SCPI command.
The online help provides more detailed information.

The built-in graphics function of the R&S®SMW200A allows the generated signals to be displayed in realtime in up to eight simultaneous windows. The user can select the type of display (I and Q versus time, frequency spectrum, vector diagram, etc.) and the point in the signal flow where the measurement will be performed.

The baseband measurement function allows realtime measurement of the level of a signal or signal component at defined points in the signal flow. This feature is especially useful when the level of specific components of a complex signal is to be determined or varied during a measurement, as for example in closed-loop scenarios.

Automation made easy
The R&S®SMW200A can be controlled via all common remote interfaces. The user benefits from a number of help functions when programming an automatic test sequence control. The SCPI commands for every setting parameter can be displayed directly and all modifications of the instrument's preset status can be highlighted graphically. This makes it easy to identify all parameters that are important for remote control.

The R&S®SMW200A also has a built-in SCPI macro recorder with code generator, which records all manual operating steps to generate a file with a remote command sequence. Code templates are provided for directly generating executable code for MATLAB® or CVI. User-specific templates can also be used. As a result, the R&S®SMW200A contributes to minimizing the time required for test automation, saving development resources.

The built-in SCPI macro recorder and code generator supports fast, convenient generation of SCPI program sequences.

A fast instrument for speedy work
The LINUX-based operating system of the R&S®SMW200A helps ensure short boot times. The high computer performance speeds up work even when settings require comprehensive signal calculation.

Grows with your needs

Advanced technology and a modular, upgradeable hardware concept make the R&S®SMW200A a future-ready investment.

R&S®SMW200A hardware options can be retrofitted with minimum effort. The baseband modules come as plugins and can easily be inserted into the rear panel without opening or recalibrating the instrument.

Software functions (e.g. digital standards) are simply activated via key codes. The R&S®SMW200A firmware can be updated from a USB flash drive or via LAN. Free updates can be downloaded (see Downloads: Firmware)

In this way, the R&S®SMW200A can be precisely customized to suit the applications at hand and can be enhanced whenever new requirements arise. Users only have to purchase what they currently need and are free to decide on upgrades according to future requirements.

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