Rohde & Schwarz FSWX signal and spectrum analyser

Rohde & Schwarz’s FSWX is a signal and spectrum analyser with multiple input ports and a cutting-edge internal multi-path architecture. It also features low phase noise for high signal purity and a spurious-free dynamic range, enabling high RF performance.

The instrument’s wide internal bandwidth of 8 GHz allows for comprehensive analysis even of complex waveforms and modulation schemes. It has a high measurement speed and analysis tools tailored to the user’s needs, making it suitable for modern RF applications.

The multichannel device 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 analyse the interactions between diverse signals. This opens up a multitude of measurement scenarios.

Its internal multi-path architecture allows for cross-correlation mode, a novel feature of the device. A single signal input is internally split into two independent signal paths, each equipped with its own local oscillator and ADC. Advanced cross-correlation algorithms can thus 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, and is especially helpful when measuring error vector magnitude (EVM). The architecture also means users can apply an IF or RF power trigger at distinct frequencies, easily revealing the effects between two RF signals.

Traditionally, for preselection in the microwave range, spectrum analysers rely on YIG filters, which need to be bypassed for wideband signal analysis. The product 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. For users requiring narrowband applications, a YIG filter can still be added optionally.

The CrossACT (Cross Application Control and Triggering) firmware feature synchronises various measurements across different input channels, allowing for simultaneous analysis with multiple tools. The Linux-based operating system meanwhile provides a high level of security and long-term support, for users in security-sensitive environments.