With the introduction of the FSWX signal and spectrum analyzer, a cutting-edge tool created to get beyond the drawbacks of existing measurement techniques, Rohde & Schwarz is poised to completely transform the field of signal and spectrum analysis.
With its innovative architecture that combines sophisticated cross-correlation methods with multiple input ports, the FSWX opens up completely new measurement scenarios for testing RF systems.
Designed for satellite, wireless, and mobile communications applications, it satisfies the increasing need for greater modulation orders, larger modulation bandwidths, and faster data rates—areas in which conventional signal analyzers frequently falter. An important development in the business, the FSWX will make its premiere at IMS2025 in San Francisco.
With the release of the FSWX, the first multichannel signal and spectrum analyzer with numerous input ports, Rohde & Schwarz opens up new possibilities in signal analysis. A unique cross-correlation feature is made possible by its state-of-the-art internal multi-path architecture, which makes it the first instrument of its kind.
The FSWX has an RF performance that is unmatched by any other signal and spectrum analyzer on the market when combined with its spurious-free dynamic range, low phase noise for high signal purity, and exceptional residual EVM.
Even the most complicated waveforms and modulation schemes can be thoroughly analyzed because to the instrument’s broad internal bandwidth of 8 GHz.
With its high measurement speed and user-specific analysis tools, the FSWX raises the bar for performance and accuracy in signal analysis for contemporary RF applications, ranging from testing active RF components to testing cutting-edge automotive radars, complex airborne radar scenarios, satellite testing in A&D applications, and the most recent WLAN and cellular technologies, including 5G and beyond.
Multiple input ports
The multichannel FSWX offers the ability to measure multiple signal sources simultaneously, regardless of whether they operate at the same or different frequencies.
With synchronous input ports, each featuring 4 GHz analysis bandwidth, users can seamlessly analyze the interactions between diverse signals.
This opens up a multitude of new measurement scenarios, for instance, phase-coherent measurements of antenna arrays used in beamforming for wireless communications as well as in airborne and automotive radar sensors.
Multi-path architecture and cross-correlation
Its advanced internal multi-path architecture allows for the cross-correlation mode, a novel feature of the FSWX. A single signal input is internally split into two independent signal paths, each equipped with its own local oscillator and ADC.
With this innovative design, advanced cross-correlation algorithms can be applied in the digital backend, effectively removing the inherent noise of the measurement instrument.
This feature reveals spurs not easily seen without cross-correlation. It is especially helpful when, for instance, measuring Error Vector Magnitude (EVM), a critical factor in mobile communications.
The added wideband noise of traditional signal and spectrum analyzers limits the accuracy and dynamic of EVM measurements. With the cross-correlation feature, however, the FSWX provides an unobstructed view of the DUT for precise EVM analysis.
The internal multi-path architecture also offers advanced triggering options. For example, users can apply an IF or RF power trigger at distinct frequencies, as the multi-path design allows for independent frequency settings for each receive path behind the splitter. This way, the FSWX can easily reveal effects between two RF signals.
Advanced filter banks and broadband ADCs
Traditionally, for preselection in the microwave range, spectrum analyzers rely on YIG filters. Since they are known for their challenging frequency response, YIG filters need to be bypassed for wideband signal analysis.
It, however, employs broadband ADCs in conjunction with filter banks that span the entire operating frequency range, allowing for pre-selected signal analysis while eliminating the need for YIG filters.
The filter banks provide high precision, optimizing instrument settings for specific applications and significantly reducing the risk of unwanted signal images contaminating results. For users requiring narrowband applications, a YIG filter can still be added optionally.
Innovative firmware applications
It also provides innovative firmware applications such as the CrossACT (Cross Application Control and Triggering) firmware feature. It synchronizes various measurements across different input channels, allowing for simultaneous analysis with multiple tools.
This capability simplifies comparisons, such as determining whether the higher harmonics of a radar signal directly impact the EVM performance of a 5G signal.
For customers in security-sensitive environments, the FSWX’s Linux-based operating system offers long-term support and a high degree of protection. The FSWX is a great option for demanding applications because of its stable and dependable operating system.
At the IEEE MTT-S International Microwave Symposium (IMS), which will take place from June 17–19, 2025, at the Moscone Center in San Francisco, CA, Rohde & Schwarz will make its first public demonstration of its revolutionary FSWX signal and spectrum analyzer at exhibit 1443.
Leadership Comments
Michael Fischlein, Vice President Spectrum & Network Analyzers, EMC & Antenna Test at Rohde & Schwarz, is thrilled to introduce the new FSWX: “Our team has truly re-imagined signal and spectrum analysis technology with our new FSWX. They have come up with an innovative architecture and design to empower our customers to tackle complex measurement scenarios in the evolving landscape of wireless communications and radar technology that were previously unattainable. In other words, the FSWX makes measuring the impossible, possible.” The instrument’s innovative design features include multiple input ports, cross-correlation capabilities, advanced filter banks and broadband ADCs.
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