Enable deeper insights in measurement and analysis by expanding the capabilities of your FieldFox handheld analyzer with field-upgradeable software licenses. These capabilities are engineered to deliver benchtop results into the field.

  • Handle routine maintenance and in-depth troubleshooting with one instrument
  • Maximize performance with network analyzer, spectrum analyzer, built-in power meter, vector voltmeter, and more
  • Order with a new instrument or upgrade an existing instrument
Base model includes a cable and antenna tester (CAT).


Spectrum Analysis

230/231 – Spectrum Analyzer

Perform high-performance spectrum analysis with four trace options, different detector types, radio standard selection, and flexible limit lines.

235 – Pre-amplifier

Increase spectrum analyzer sensitivity and reduce the DANL.

236 – Interference Analyzer and Spectrogram

Identify interfering signals quickly and accurately using spectogram or waterfall display. Record traces over time and store them for offline processing.  

312 – Channel Scanner

Verify signal coverage, identify potential interference issues, and optimize network performance with channel power measurements of up to 20 channels at once.

Cable, Antenna, & Network Analysis

010 – VNA Time Domain

Display reflection or transmission coefficients in the time domain and remove unwanted responses with time-domain gating.

110 – Transmission Measurement

Use vector network analyzer mode to measure transmission and reflection (S21 and S11) magnitude and phase.

111 – QuickCal

Enable hassle-free calibration in the field for network analysis with no mechanical standards required.

303 – Network Analysis

Enables vector measurements for S11 (magnitude and phase) and scalar measurements for S21 (magnitude only).  Requires option 110.

212 – 1-Port Mixed-Mode S-Parameters

Make balanced, mixed-mode S-parameter reflection measurements (Scc11, Sdd11, Scd11, Sdc11) with network analyzer mode.

215 – TDR Cable Measurements

Enable vector network analyzer mode to measure all four S-parameters (S21, S11, S12, S22) magnitude and phase.

305 – Cable and Antenna Analyzer

Troubleshoot and maintain the performance of RF cables and antennas.

308 – Vector Voltmeter (VVM)

Measure the phase shift and elctrical length of a device and view the results on the large display from a distance.

Power Measurements

208 – USB Power Measurements versus Frequency

Characterize the scalar transmission response of devices such as mixers and converters using USB power sensor measurements versus frequency.

302 – USB Power Sensor Support

Characterize RF pulses such as those used in radar and electronic warfare systems using a USB peak power sensor.

330 – Pulse Measurement with USB Peak Power Sensor

Efficiently characterize pulsed RF signals by leveraging a Keysight USB peak power sensor.


030 – Remote Control Capability

View and control FieldFox remotely using an iOS device or an Android device.

Learn more about each software option in the Technical Overview.

Free Trials

  • Get free, 30-day licenses
  • Enable options on your FieldFox
  • Evaluate the full-featured version with no functionality restrictions

Want help or have questions?