The Keysight N9918A FieldFox is a handheld microwave analyzer delivering integrated cable, antenna, and network analysis from 30 kHz to 26.5 GHz. Built for field deployment in aerospace, defense, telecommunications, and satellite sectors, this 3.0 kg instrument combines spectrum analysis, vector network analysis, and cable/antenna testing in a single platform. Its dust-free, fan-free design withstands harsh environments – salt spray, humidity, and explosive atmospheres per MIL-PRF-28800F Class 2 and MIL-STD-810G Method 511.5 Procedure I.
Technical Specifications
Frequency Coverage
• Cable and Antenna Analyzer (CAT)/VNA: 30 kHz to 26.5 GHz
• Spectrum Analyzer: 5 kHz to 26.5 GHz or 100 kHz to 26.5 GHz (optional)
• RF Source: 30 kHz to 26.5 GHz
• Vector Voltmeter: 30 kHz to 26.5 GHz
• Power Meter: 5 kHz to 26.5 GHz Performance
• VNA Dynamic Range: 100 dB to 9 GHz; 90 dB to 18 GHz
• Spectrum Analyzer Amplitude Accuracy: ±0.6 dB (full band, -10 to +55 °C) or ±0.5 dB (without warm-up)
• Spur-Free Dynamic Range: 105 dB
• Trace Noise: 0.004 dB typical
• RF Output Power: up to 1 dBm typical; maximum -4 dBm; 1 dB step resolution
• IF Bandwidth: 10 Hz to 100 kHz (nine settings)
• Dual built-in ports for simultaneous S-parameter measurement Environmental
• Weight: 3.0 kg (6.6 lbs)
• Operating Temperature: -10 to +55 °C
• Weather-resistant construction; salt-spray and humidity rated
• No fans or vents; sealed design for extended field reliability – Key Features • Simultaneous four S-parameter (S11, S21, S22, S12) measurement with magnitude and phase
• Distance-to-Fault and Return Loss analysis for cable/antenna characterization
• Full-band tracking generator for spectrum analysis
• Optional Time-Domain Reflectometry (TDR) within single sweep
• Selectable analysis bandwidth up to 1 MHz (IQ streaming option)
• Variable DC source, GPS receiver, and interference analyzer as optional modules – Typical Applications • Field verification of RF/microwave cables and antennas
• Component characterization and network tuning
• System troubleshooting in satellite, defense, and telecom infrastructure
• In-situ power measurement and harmonic analysis – Compatibility & Integration Two-port architecture supports standard RF connectors and test fixtures. Optional modules expand capability without replacing the base instrument.
