The Keysight N9953B FieldFox is a handheld microwave analyzer delivering spectrum analysis, vector network analysis, and cable/antenna testing in a single portable instrument rated to 54 GHz. Built for field deployment, it operates across demanding environments with a sealed, water-resistant chassis meeting MIL-PRF-28800F Class 2 and MIL-STD-810G standards. The base model includes Cable and Antenna Tester (CAT) functionality; optional modules unlock Vector Network Analyzer (VNA), Spectrum Analyzer (SA), vector voltmeter, power meter, and digital demodulation capabilities. Real-time analysis bandwidth reaches 120 MHz gap-free, supported by 115 dB system dynamic range for S-parameter measurement. GPS/GNSS integration enables geolocation and timestamped signal capture. Recorded IQ data streams to PathWave Vector Signal Analysis (89600 VSA) software for post-acquisition analysis, including MAC/RLC/RRC-layer decoding across multiple radio frames.
Technical Specifications
• Frequency Range: 9 kHz to 54 GHz (SA); 300 kHz to 54 GHz (CAT/VNA); usable down to 5 kHz
• Real-Time Analysis Bandwidth: 120 MHz gap-free
• Maximum IQ Streaming Bandwidth: 1 MHz
• VNA System Dynamic Range: 115 dB (S-parameters)
• Spectrum Analyzer Accuracy: ± 0.3 dB typical
• Phase Noise @ 1 GHz (10 kHz offset): −113 dBc/Hz
• Weight: 3.4 kg (7.4 lb)
– Key Features
• Sealed instrument enclosure with water-resistant chassis, keypad, and case
• MIL-STD-810G Method 511.5 type tested for explosive environments
• IEC/EN 60529 ingress protection rating
• Simultaneous four S-parameter measurement (VNA option)
• Time-domain reflectometry (TDR) cable measurements (Option 215)
• 1-port mixed-mode S-parameters (Option 212)
• Over-the-air (OTA) measurements for 5G NR and LTE
• Pulse and noise figure measurements
• GPS/GNSS receiver for timestamping and geolocation
– Typical Applications
• 5G NR and LTE signal verification
• Cellular, wireless-connectivity, aerospace, and defense testing
• Field maintenance and troubleshooting
• Cable and antenna characterization
• Signal capture and post-processing analysis
– Compatibility & Integration
• PathWave Vector Signal Analysis (89600 VSA) software support
• Fully corrected IQ data capture and recording
