Rohde & Schwarz has launched the FSWX signal and spectrum analyzer, a multichannel signal and spectrum analyzer with multiple input ports, enabling new measurement scenarios in RF system testing. The solution is designed to assist the growing demand for higher data rates, wider modulation bandwidths and increased modulation orders, and features an internal multi-path architecture that enables advanced cross-correlation capabilities.
The instrument’s wide internal bandwidth of 8GHz allows for comprehensive analysis of complex waveforms and modulation schemes. Combined with a high measurement speed and analysis tools, the FSWX has been designed to deliver performance and precision to signal analysis for modern RF applications, including state-of-the-art automotive radar testing. The instrument features include multiple input ports, cross-correlation capabilities, advanced filter banks and broadband ADCs.
Michael Fischlein, vice president, Spectrum & Network Analyzers, EMC & antenna test at Rohde & Schwarz, said, “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.”
Multiple input ports
The multichannel FSWX enables simultaneous measurement of multiple signal sources, whether they operate at the same or different frequencies. Its synchronous input ports, each offering 4GHz of analysis bandwidth, enable seamless analysis of signal interactions. This capability supports a range of advanced measurement scenarios, including phase-coherent analysis of antenna arrays used in beamforming for wireless communications, as well as in airborne and automotive radar systems.
Multi-path architecture and cross-correlation
Its internal multi-path architecture enables a 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 design, advanced cross-correlation algorithms can be applied in the digital backend, effectively removing the inherent noise of the measurement instrument. With the cross-correlation feature, the FSWX is said to provide 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 the effects between two RF signals.
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. The FSWX, 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
The FSWX also provides firmware applications such as the Cross Application Control and Triggering (CrossACT) firmware feature. It synchronizes 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.
The Linux-based operating system of the FSWX provides a high level of security and long-term support.
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