The Keysight N9916A FieldFox is a handheld RF analyzer delivering bench-level measurement accuracy in field environments. This dual-port, 50 ohm instrument spans 30 kHz to 14 GHz and combines cable and antenna analysis with optional vector network analysis, spectrum analysis, and power measurement capabilities. Weighing 3.0 kg and rated for -10 to +55 °C operation, it serves field service, installation, and maintenance professionals across RF and microwave applications.
Technical Specifications
Core Instrument
• Frequency Range: 30 kHz to 14 GHz (base CAT function)
• Built-in Ports: 2
• System Impedance: 50 ohm nominal; 75 ohm with appropriate adapter and calibration kit
• Weight: 3.0 kg (6.6 lb)
• Operating Temperature: -10 to +55 °C
Vector Network Analysis (VNA Option)
• Full four S-parameter measurement (S11, S21, S12, S22)
• Magnitude and phase capability
• 1-port mixed-mode S-parameters
• Time domain, DTF, and TDR analysis in same sweep
• Calibration engine based on Keysight PNA architecture
Spectrum Analysis (SA Option)
• Frequency Range: 100 kHz to 14 GHz
• Amplitude Accuracy: ±0.5 dB without warm-up
• Channel Power Measurement Accuracy: ±0.5 dB
• Real-Time Spectrum Analysis: 10 MHz bandwidth
• Minimum Detectable Signal (RTSA): 22 ns
• Field strength, AM/FM tune and listen, spectrogram, noise figure, and OTA measurements (LTE FDD, 5G)
Power Measurement
• Microwave Power: Up to 40 GHz via USB power sensors
• Peak and average power measurement of modulated signals via USB peak power sensors
– Key Features
• InstAlign automatic internal amplitude alignment technology
• QuickCal rapid calibration capability
• Real-time signal detection with 22 ns pulse resolution
• DTF distance-to-fault measurements
• Integrated vector voltmeter
• Extended range transmission analysis (ERTA)
– Typical Applications
Field service and maintenance of cellular infrastructure, antenna commissioning, transmission line diagnostics, cable testing, component characterization, and spectrum monitoring in RF/microwave systems.
– Compatibility & Integration
Accepts Agilent USB power sensors for extended power measurement to 40 GHz. Supports both 50 ohm and 75 ohm measurements with appropriate calibration kits.
