Keysight (Agilent) N9914B FieldFox Handheld RF Analyzer, 6.5 GHz

The Keysight N9914B FieldFox is a handheld RF analyzer that combines spectrum analysis, vector network analysis, and cable and antenna testing in a single 3.4 kg instrument. Operating to 6.5 GHz, it delivers 115 dB dynamic range for simultaneous four-port S-parameter measurement and achieves -163 dBm DANL at 1 GHz with ±0.3 dB measurement accuracy. The dual Type-N port design supports 30 kHz to 6.5 GHz cable and antenna analysis, 9 kHz to 6.5 GHz spectrum analysis with optional real-time capability, and 100 MHz gap-free real-time bandwidth.

Phase noise performance reaches -124 dBc/Hz at 1 MHz offset. Built-in GPS/GNSS geolocation, LAN connectivity, and optional remote control enable field deployment in demanding environments. Measurement functions include optional vector network analysis, power metering, field strength, noise figure, and 5G NR/LTE over-the-air support.

Technical Specifications

• Frequency Range (Cable/Antenna/VNA): 30 kHz to 6.5 GHz


• Frequency Range (Spectrum Analysis): 9 kHz to 6.5 GHz


• Real-Time Bandwidth: 100 MHz gap-free


• Maximum Analysis Bandwidth: 120 MHz


• Dynamic Range (S-parameters): 115 dB


• DANL @ 1 GHz: -163 dBm


• Measurement Accuracy: ±0.3 dB


• Trace Noise: 0.0008 dB rms


• Phase Noise @ 1 GHz (1 MHz offset): -124 dBc/Hz


• Phase Noise @ 1 GHz (10 kHz offset): -117 dBc/Hz


• Phase Noise @ 1 GHz (30 kHz offset): -115 dBc/Hz


• Third Order Intercept @ 1 GHz: +11 dBm


• Output Power: Up to 1 dBm


• System Impedance: 50 Ω nominal (75 Ω with adapter)


• Attenuator Range: 40 dB (5 dB steps)


• IF Bandwidth Options: 3 Hz to 100 kHz (nine steps)


• Ports: 2 Type-N (f) connectors


• Weight: 3.4 kg

Key Features

• Dual-port simultaneous S-parameter measurement


• Real-Time Spectrum Analysis (RTSA) with option


• GPS/GNSS support for geolocation and timestamping


• LAN and optional remote control


• Optional USB power sensor integration


• SCPI compatibility and 89600 VSA Software support

Measurement Capabilities

• Cable and Antenna Analysis (standard)


• Vector Network Analysis (optional)


• Spectrum Analysis (optional)


• Power Meter, Vector Voltmeter, Noise Figure (optional)


• Field Strength and Spectrogram (optional)


• 5G NR and LTE over-the-air measurements (optional)

Typical Applications Field maintenance, installation verification, 5G and satellite communication system troubleshooting, antenna characterization, transmission line analysis, and electronic warfare assessment.