The Keysight N9928A FieldFox is a handheld microwave analyzer that combines vector network analysis, cable and antenna characterization, power measurement, and spectrum analysis into a single portable instrument. Operating from 30 kHz to 26.5 GHz, it delivers bench-level measurement accuracy in demanding field environments without sacrificing portability or ruggedness.
Technical Specifications
Frequency Range and Resolution
• Operating range: 30 kHz to 26.5 GHz
• Frequency resolution: 1.34 Hz (≤10 GHz), 5.36 Hz (≤20 GHz), 8.04 Hz (≤50 GHz)
• Frequency accuracy: ±0.7 ppm (spec) + aging; typical ±0.4 ppm + aging
Vector Network Analysis
• Base configuration: Transmission/Reflection (S11, S21)
• Optional 2-port full S-parameters (S11, S21, S12, S22) and mixed-mode S-parameters
• Dynamic range: Up to 100 dB to 9 GHz, 94 dB to 20 GHz, up to 95 dB with four independent receivers
• Directivity: >42 dB
• Calibration: QuickCal, full 2-port unknown thru, Thru/Reflect/Line (TRL)
• Time Domain Reflectometry (TDR) via inverse Fourier transform of frequency-domain data
Cable and Antenna Analysis
• Frequency range: 30 kHz to 26.5 GHz
• Distance-to-fault (DTF), return loss, cable loss, and optional VSWR/reflection measurements
Power Measurement
• Built-in power meter: 100 kHz to 26.5 GHz
• USB power sensor support: 9 kHz to 24 GHz (sensor-dependent)
• Average and pulse power measurement
• Output power: ±1 dB flat across frequency range, 1 dB step adjustment
• Maximum leveled output power: Typically -4 dBm
Additional Capabilities
• Vector Voltmeter (VVM): 30 kHz to 26.5 GHz for phase and electrical length comparison
• Interference analyzer with spectrogram, waterfall, trace playback, and recording
• Optional variable DC source
• Built-in GPS receiver
Measurement Quality
• Trace noise: 0.004 dB rms
• IF bandwidth: 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz
– Key Features
• Two built-in measurement ports with 3.5 mm (m) connectors
• Rechargeable Li-ion battery with included AC/DC adapter
• Weight: 3.0 kg (6.6 lb)
• Rugged, dust-free design with no fans or vents
• LAN connectivity and USB for power sensor support and SCPI control
– Typical Applications
Field testing and maintenance of microwave systems, antenna characterization, cable and transmission line diagnostics, and interference identification across cellular, wireless, and satellite frequency bands.
– Compatibility & Integration
Supports external USB power sensors and SCPI command control. LAN connectivity enables remote operation and data logging.
