The Agilent/Keysight N9911X FieldFox is a handheld RF analyzer that combines spectrum analysis, network analysis, cable and antenna testing, and power measurements in a single portable unit. Built for field deployment, it delivers laboratory-grade measurement accuracy in rugged form factor. Engineers and technicians rely on it for systematic RF characterization across cellular networks, cable systems, and antenna installations.
Technical Specifications
Frequency and Signal Analysis
• Frequency range up to 4 GHz (N9913A model variant)
• Frequency reference accuracy ±0.7 ppm (spec) + aging, ±0.4 ppm (typical) + aging at −10 to 55°C; enhanced when locked to GPS
• Frequency resolution as fine as 1 Hz for frequencies ≤5 GHz
• IF bandwidth options: 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz
• Spectrum analyzer sensitivity: −148 dBm to 6 GHz
• Third order intercept (TOI): better than +18 dBm
• Phase noise: −88 dBc at 10 kHz offset
• Dynamic range: 96 dB in spectrum analysis mode
Network Analysis (VNA)
• System impedance: 50 Ω nominal
• Return loss measurement speed: 1.5 ms/point at 1.75 GHz to 3.85 GHz with 1001 points, calibration ON
• Two-port transmission magnitude dynamic range: up to 72 dB
• Integrated QuickCal calibration without external kit
• CalReady provides instant calibration upon power-on or preset
• Support for mechanical calibration kits and ECal modules
Cable and Antenna Test
• Measurements: return loss, VSWR, insertion loss/transmission, one-port cable loss, distance to fault (DTF)
• DTF and TDR capable in single sweep—unique among handheld instruments
• Data points up to 1001 standard; settable to 10,001 via SCPI
– Key Features
• Rugged handheld design for field operations
• Multiple measurement domains in one instrument
• GPS-enhanced frequency reference option
• Selectable system impedance (50 Ω; 75 Ω with adapter and calibration kit)
– Typical Applications
• Cable and antenna troubleshooting
• RF network commissioning and maintenance
• Transmission line characterization
• Fault location and time-domain reflectometry
– Compatibility & Integration
N9911X waveguide calibration component set supports FieldFox CAT and VNA calibrations.
