Agilent/Keysight N9912A

The Agilent/Keysight N9912A FieldFox is a handheld RF analyzer built for field testing and maintenance across 3 MHz to 6 GHz. It delivers spectrum analysis, two-port S-parameter measurements, cable and antenna characterization, and power measurement in a portable, ruggedized platform. This instrument serves aerospace, defense, telecommunications, and general RF troubleshooting environments.

Technical Specifications

• 3 MHz to 6 GHz Measurement Modes


• Spectrum analysis with real-time signal identification and interference detection


• Two-port S-parameters (S11, S21, S12, S22) for device characterization


• Return loss, VSWR, insertion loss, and distance-to-fault measurements for transmission lines and antennas


• Power measurements including peak, average, and pulsed power Performance Parameters


• Selectable resolution bandwidth (RBW) for spectrum analysis


• Selectable video bandwidth (VBW) for trace smoothing


• Configurable sweep times across spectrum and network analyzer modes


• Frequency and amplitude accuracy dependent on calibration and measurement mode


• Dynamic range sufficient for wide-range signal analysis Connectors and Ports


• N-type RF connectors for input/output


• USB ports for external device connectivity and data storage


• Ethernet port for remote control and data transfer


• External trigger input for measurement synchronization Physical and Environmental


• Handheld, portable form factor with integrated color display


• Rechargeable battery for field operation; AC adapter for mains power


• Rated for dust, humidity, shock, and vibration per applicable MIL-STD and IP ratings User Interface and Control


• Front panel controls with on-screen menu navigation


• Field-upgradeable firmware for performance enhancements and feature additions

Key Features

• Portable design enables on-site characterization without transporting to lab facilities


• Two-port S-parameter capability supports comprehensive device and component evaluation


• Distance-to-fault measurement localizes cable faults and antenna issues in the field


• Extended frequency coverage from 3 MHz enables low-frequency signal and interference analysis

Typical Applications

• Aerospace and defense RF system commissioning and troubleshooting


• Telecommunications network field verification and maintenance


• Antenna and transmission line fault detection and characterization


• General RF signal analysis and spectrum monitoring in field environments

Compatibility & Integration Ethernet connectivity supports remote instrument control and data offload. USB ports enable field data logging and firmware updates. External trigger input allows synchronization with external measurement systems or test sequences.