The Keysight FieldFox D-Series represents the latest generation of professional handheld analyzers for field use and combines the highest measurement performance with state-of-the-art software-defined radio functionality. The devices cover frequency ranges up to 54 GHz and offer a real bandwidth of up to 120 MHz - ideal for 5G-FR1/FR2 tests, satellite communication, radar, EMC and EMF measurements as well as demanding spectrum analyses in military or industrial environments.
Thanks to the new Linux operating system, users benefit from increased system security, an optimized operating concept and improved remote control. The integrated SFP+ ports (10 GbE) enable ultra-fast, seamless streaming of IQ data - a decisive advantage for real-time analysis, interference management, TDoA/AoA location procedures or AI-supported signal evaluation.
Compared to the Keysight FieldFox C series, the D series sets new standards: It offers higher analysis bandwidths (up to 120 MHz), a modern touch display, high-speed SFP+ interfaces and a completely revised security and operating system concept. While the C series takes a software-defined approach, the D series is clearly geared towards high-frequency applications with extended demodulation and streaming functions and therefore meets the requirements of current 5G, satellite and radar networks far more comprehensively.
The N9936D model presented here is part of the powerful D series of pure microwave spectrum analyzers and offers a frequency range of up to 14 GHz. This makes it ideal for professional measurement tasks in mobile networks, IoT and industrial systems, radio monitoring, EMC diagnostics and general RF spectrum analysis.
The N9936D - like all models in the D series - supports the full 120 MHz real-time bandwidth and 120 MHz gapless IQ streaming. The integrated SFP+ interfaces make the device particularly suitable for applications such as interference analysis, continuous spectrum monitoring, TDoA-based localization or AI-supported signal evaluation. In combination with the Linux system, advanced demodulation functions and RTSA performance, the N9936D is a compact, robust and state-of-the-art analysis tool for technicians and engineers.
Features of the N9936D:
- Frequency range up to 14 GHz - ideal for cellular (2G-5G FR1), WLAN, Bluetooth, IoT, industrial RF and EMC diagnostics
- 120 MHz RTSA bandwidth - perfect for analyzing burst signals, interference, short pulses and dynamic spectra
- 120 MHz seamless IQ streaming via SFP+ (10 GbE) and USB-C/LAN
- Advanced spectrum analysis functions: Real-time spectrum analysis, spectrograms, interference search, channel and occupancy analyses
- Compatible with spectrum management software (e.g. for TDoA/AoA localization and AI-supported signal evaluation)
- Supports optional functions such as noise figure, OTA-5G/LTE analyses, EMF/EMI measurements and other software options
- Rugged, field-ready design for use in industry, mobile communications, government, energy supply and logistics
Technical product features of the series:
- Frequency range: 30/300 kHz to 54 GHz (depending on model)
- Real-time bandwidth: up to 120 MHz (RTSA)
- IQ streaming: up to 120 MHz, VITA 49 format, streamable via SFP+, USB-C or LAN
- Operating system: Linux-based for enhanced security
- Interfaces: 2× SFP+ (10 GbE), USB-C, USB-A, LAN, GPS/GNSS integrated
- Display: Touchscreen for simplified operation in the field
- Vector Network Analyzer: 2-port S-parameters, up to 117 dB dynamic range (model-dependent, N991x series)
- Spectrum Analyzer: Phase Noise up to -117 dBc/Hz, DANL up to -163 dBm (with preamplifier)
- RTSA functions: 100% POI, detection of up to 47 ns short signals
- Cable and antenna tests (CAT): DTF, TDR, RL/VSWR, insertion loss measurements (model-dependent, N991x series)
- OTA measurements: LTE, 5G NR FR1/FR2, beamforming analysis
- Pulse generator (option): CW, AM/FM, FSK, BPSK, chirp pulses (model-dependent up to maximum frequency)
- GNSS/GPS: Geotagging for measurement data, synchronization for TDoA
- Streaming compatibility: KSMS, VSA 89600, MATLAB, Python
- Ruggedness: MIL-STD-810G, IP-protected, up to 4.5 h battery life
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