Agilent/Keysight N9950A

The Keysight N9950A FieldFox is a battery-powered handheld combination analyzer that integrates cable and antenna analysis as a standard feature, with optional vector network analysis, spectrum analysis, power meter, and vector voltmeter capabilities. Operating from 300 kHz to 32 GHz, it delivers comprehensive RF and microwave characterization in a portable 3.2 kg form factor designed for field maintenance and troubleshooting.

Technical Specifications

• Frequency Range: 300 kHz to 32 GHz (CAT/VNA); 9 kHz to 32 GHz (SA with optional module)


• Two Built-In RF Ports with 4 dBm output power


• VNA System Dynamic Range: 110 dB


• Spectrum Analyzer Measurement Accuracy: ±0.5 dB (without warm-up)


• Trace Noise: 0.004 dB (rms)


• Maximum IQ Streaming Bandwidth: 1 MHz


• Weight: 3.2 kg (7.1 lb)

Key Features

• Cable and Antenna Analysis (CAT) standard; DTF/TDR capable with dual-domain measurements in single sweep


• All four S-parameters measurement


• Field-upgradeable via software license keys


• USB sensor compatibility for average and pulse power measurement


• Rechargeable Li-ion battery with AC/DC adapter supplied


• Soft carrying case with backpack and shoulder strap included


• Compatible with Keysight 85521A Calibration Kit (DC to 26.5 GHz, 3.5 mm connector)

Optional Capabilities

• Vector Network Analyzer (VNA)


• Real-Time Spectrum Analysis (RTSA)


• Built-In Power Meter


• Vector Voltmeter


• PathWave Vector Signal Analysis (89600 VSA) Software integration

Typical Applications

• RF/microwave system field verification and maintenance


• Cable loss and return loss characterization


• Antenna performance evaluation


• Signal integrity and distortion analysis


• Power measurement and monitoring