The new R&S FSWX-KM700 pulse analysis option expands the capabilities of the R&S FSWX multi-channel signal and spectrum analyzer for advanced pulsed-signal and DRFM testing. It enables engineers to examine how Digital Radio Frequency Memory (DRFM) jammers capture, reproduce and manipulate radar pulses. The option provides detailed measurements of key pulse parameters and pulse trains, along with capture-versus-time analysis, pulse results and statistics, magnitude/phase/frequency-versus-time measurements, and parameter trends including channel-to-channel parameter delta information.
DRFM jammers are used in electronic warfare applications to capture radar emissions, digitize the signals and reproduce them with controlled changes in delay, phase and frequency. As modern radar systems adopt increasingly agile and complex waveforms, test equipment must provide detailed insight into pulse shape, timing, modulation and signal repeatability. The R&S FSWX addresses these requirements with its dual-channel, phase-coherent architecture. With the addition of the R&S FSWX-KM700, the analyzer gains dedicated capabilities for pulsed-signal characterization and DRFM analysis.
The option measures a comprehensive range of pulse characteristics, including pulse width, amplitude, rise and fall times, pulse repetition interval, duty cycle, pulse shape and overshoot. These measurements help engineers evaluate how accurately a jammer reproduces the envelope of an original radar burst. Precise analysis of timing and amplitude behavior is particularly important when assessing signal fidelity, as even small variations can influence the performance of reproduced or manipulated radar signals.
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The analysis also covers complete pulse trains. The option extracts pulse repetition frequency spectra and pulse-to-pulse variation data, allowing engineers to verify complex pulse sequence behavior and timing patterns. R&S FSWX-KM700 supports chirped pulses, pulse width modulation, pulse position modulation and phase-modulated waveforms. Engineers can use these measurements to check whether a device handles modulation schemes used by modern radar systems, including both the pulse envelope and modulation content.
The system can trigger on amplitude, pulse width, pulse repetition interval or user-defined patterns. This helps engineers isolate selected events inside a pulse train and focus the measurement on the relevant parts of the signal. For longer measurements, R&S FSWX-KM700 aggregates results from many captured pulses. This provides information about repeatability and consistency over time and helps engineers assess whether timing or modulation errors occur only under certain conditions.
The option comes with the following displays: parameter trend for DRFM electronic attack technique analysis, capture vs. time to measure jammer response time and latency between stimulus and response, individual pulse parameter display such as pulse amplitude, frequency, and phase to make sure there are no distortions introduced by the jammer. These measurements connect pulse analysis with the behavior of the jammer under test.
With the new R&S FSWX-KM700 option, the FSWX signal and spectrum analyzer gains a more specialized role in DRFM test workflows. It combines phase coherent multi-channel analysis with pulse, pulse train, modulation and segmented capture functions in one instrument, supporting verification of signal fidelity, timing behavior and consistency in agile electronic warfare scenarios.
Rohde & Schwarz showcases the new R&S FSWX-KM700 pulse analysis option at EuMW 2026 at booth B10 at Excel London from October 6 to 8, 2026.
