Keysight (Agilent) N9952A FieldFox Handheld Microwave Analyzer, 50 GHz

The Keysight N9952A FieldFox is a handheld microwave analyzer that combines cable and antenna analysis, vector network analysis, and spectrum analysis into a single portable instrument rated to 50 GHz. Purpose-built for field deployment, it delivers lab-grade measurement accuracy in environments where bench equipment is impractical. The unit weighs 3.2 kg, meets MIL-PRF-28800F Class 2 durability standards, and carries IP53 ingress protection.

Core performance centers on two NMD 2.4 mm test ports supporting frequencies from 300 kHz to 50 GHz (Cable and Antenna Analyzer and Vector Network Analyzer) or 5 kHz to 50 GHz / 9 kHz to 50 GHz (Spectrum Analyzer). Output power reaches 0 dBm or 4 dBm. Trace noise measures 0.004 dB rms with system dynamic range of 70–100 dB or 110 dB.

Spectrum Analyzer amplitude accuracy is ±0.5 dB without warm-up; overall amplitude accuracy is ±0.3 dB. Third-order intercept (TOI) at 1 GHz: +13 dBm. Display Average Noise Level (DANL) at 1 GHz: −159 dBm.

Phase noise at 1 GHz reaches −113 dBc/Hz (1 MHz offset), −111 dBc/Hz (10 kHz offset), and −108 dBc/Hz (30 kHz offset). Measurement speed achieves 478 µs/pt at 1001 points per sweep. Maximum analysis and real-time bandwidths are both 10 MHz.

Standard attenuator spans 30 dB in 5 dB steps.

Technical Specifications

• Frequency range: 300 kHz to 50 GHz (CAT/VNA); 5 kHz to 50 GHz or 9 kHz to 50 GHz (SA)


• Test ports: 2 × NMD 2.4 mm (m)


• Output power: 0 dBm or 4 dBm


• Trace noise: 0.004 dB rms


• Dynamic range: 70–100 dB or 110 dB


• Amplitude accuracy (SA): ±0.5 dB; overall: ±0.3 dB


• TOI @ 1 GHz: +13 dBm


• DANL @ 1 GHz: −159 dBm


• Phase noise @ 1 GHz: −113 dBc/Hz (1 MHz), −111 dBc/Hz (10 kHz), −108 dBc/Hz (30 kHz)


• Sweep speed: 478 µs/pt (1001 points)


• Analysis bandwidth: 10 MHz maximum


• Attenuator: 30 dB range, 5 dB steps


• Weight: 3.2 kg


• Environmental: MIL-PRF-28800F Class 2, IP53

Key Features

• Software-configurable: Standard Cable and Antenna Analyzer with optional Vector Network Analyzer, Spectrum Analyzer, Power Meter, Independent Signal Generator, Tracking Generator, TDR, and Extended Range Transmission Analysis


• Full 2-port S-parameter capability (with VNA option)


• Real-Time Spectrum Analysis, Interference Analyzer, Spectrogram, and Time Gating (with SA option)


• Noise Figure and Over-The-Air measurements available


• Pulse and Built-in Power Meter functionality

Typical Applications

• Cable and antenna characterization


• Microwave component testing


• Field network analysis and troubleshooting


• Spectrum monitoring and interference detection


• Time-domain cable fault location

Compatibility & Integration Test port connectors conform to NMD 2.4 mm standards. USB interface supports external power sensor integration.