The Keysight N9915C FieldFox C is a handheld microwave analyzer delivering comprehensive field measurement capabilities across 3 kHz to 10 GHz. Built for cable and antenna analysis, spectrum monitoring, and vector network measurements, this instrument combines portable durability with laboratory-grade performance in demanding field environments.
Technical Specifications
Frequency and Dynamic Range
• Frequency range: 3 kHz to 10 GHz
• Dynamic range: >100 dB, >104 dBc, 115 dB
• System dynamic range: >104 dBc
• Trace noise: <0.003 dB rms, 0.0011 dB @ 1 GHz
Power and Linearity
• Output power: −60 dBm to +10 dBm
• Third-order intercept (TOI) @ 1 GHz: +10 dBm
• Attenuator step: 5 dB/step
Bandwidth and Real-Time Performance
• Real-time bandwidth: Up to 120 MHz, 100 MHz
• Gap-free, real-time bandwidth: Up to 120 MHz
• Bandwidth options: 10 MHz, 40 MHz, 120 MHz
• Maximum IQ streaming bandwidth: 1 MHz
• Spectrum analyzer accuracy: ±0.15 dB, ±0.3 dB
Architecture
• Ports: 2 built-in
• Internal sources: 1
• Impedance: 50 Ohms
• Connectors: Type-N (f) test port
– Key Features
Measurement Modes
• Cable and Antenna Analyzer (CAT) — standard
• Vector Network Analyzer (VNA) — optional
• Spectrum Analyzer — optional
• Vector voltmeter, mixed-mode S-parameters, power measurements, time domain analysis
Physical Design
• Weight: 3.4 kg (7.4 lb)
• Display: 6.5-inch transflective color LCD with LED backlight, anti-glare
• Battery: Rechargeable Li-ion, field swappable, up to 4 hours operational life
• Ruggedization: MIL-PRF-28800F Class 2, MIL-STD-810G, IEC/EN 60529
Connectivity and Control
• Interfaces: LAN, USB, GPIB
• Remote control: SCPI over LAN and USB
• GPS/GNSS receiver for geolocation and timestamping
– Typical Applications
Communication system verification, cable and transmission line characterization, antenna performance assessment, and spectrum occupancy surveys across cellular and broadband networks.
– Compatibility & Integration
Software-defined upgrades enable frequency, bandwidth, and functional reconfiguration via license activation. Standards support includes 5G NR, LTE, and 5GTF with over-the-air measurements for 5G NR and LTE. SCPI programming and DataLink software integration support A, B, and C Series FieldFox analyzers. Standard package includes AC/DC adapter, rechargeable battery, soft carrying case with backpack and shoulder straps.
