The Keysight N9912C FieldFox is a software-defined handheld RF analyzer purpose-built for field deployment across demanding test environments. This configurable platform operates as a cable and antenna analyzer (CAT), vector network analyzer (VNA), or spectrum analyzer (SA), with optional real-time spectrum analysis (RTSA) and over-the-air measurement capabilities for 5G NR and LTE systems. The instrument combines dual built-in ports with up to 115 dB VNA dynamic range and spectrum analyzer accuracy of ±0.15 dB, delivering measurement performance in a portable 3.34 kg package. Type-tested to MIL-STD-810G Method 511.5 Procedure I for explosive environments and rated IP53 per IEC/EN 60529, it operates reliably from -10 to +55 °C across harsh field conditions.
Technical Specifications
Frequency & Bandwidth
• Frequency range: 3 kHz to 10 GHz (4, 6.5, and 10 GHz configurations available)
• Analysis bandwidth: Up to 40 MHz
• Real-time bandwidth: Up to 40 MHz gap-free
• IF bandwidth options: 3 Hz to 100 kHz (3 Hz, 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz)
Electrical Performance
• VNA dynamic range: Up to 115 dB (100–110 dB typical)
• Spectrum analyzer accuracy (without warmup): ±0.15 dB, ±0.3 dB
• System dynamic range: >104 dBc
• SA DANL: -160 dBm (3 kHz to 30 MHz region)
• Dual built-in ports
Physical & Environmental
• Weight: 3.34–3.4 kg
• Display: 6.5-inch transflective color LCD-LED with LED backlight
• Operating temperature: -10 to +55 °C
• Environmental rating: IP53 (IEC/EN 60529), MIL-PRF-28800F Class 2
– Key Features
• Vector voltmeter and built-in power meter
• Independent signal generator with tracking generator option
• Real-time and interference analysis modes
• Time domain reflectometry (TDR) for cable characterization
• Pulse measurement and analog demodulation
• Phase array antenna support
• GPS/GNSS receiver for geolocation and timestamping
• Indoor and outdoor mapping functions
• EMI and EMF measurement capabilities
• USB power sensor compatibility
• Pre-amplifier and channel scanner options
• Selectable 10 MHz or 40 MHz bandwidth configurations
– Typical Applications
• Field installation and maintenance of RF networks
• Cable and antenna acceptance testing
• 5G NR and LTE over-the-air measurements
• Spectrum monitoring and interference detection
• Network analyzer measurements in remote locations
• Explosive environment operations
– Compatibility & Integration
The N9912C accepts external USB power sensors and supports GPS/GNSS integration for time-synchronized, geotagged measurements across distributed test sites.
