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FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50 GHz

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FieldFox Handheld Analyzers

4/6.5/9/14/18/26.5/32/44/50 GHz



N9915A N9925A N9935A

N9916A N9926A N9936A

N9917A N9927A N9937A

N9918A N9928A N9938A

N9950A N9960A

N9951A N9961A

N9952A N9962A

Carry Precision with You

Measuring up and earning a spot in your field kit is the driving idea behind Keysight’s FieldFox handheld analyzers. They’re equipped to handle routine maintenance, in-depth troubleshooting and anything in between. Better yet, FieldFox delivers precise microwave and millimeter-wave measurements - wherever you need to go.

Why choose FieldFox?

  • Measure with confidence - precise measurements agree with benchtop results
  • Withstands your toughest working environments - rugged enough to meet MIL-specs
  • Weighs less than alternative solutions - 7.1 lb (3.2 kg)
  • Offers budget flexibility - choose capabilities you need today and easily upgrade later

Leverage Our Legacy of Measurement Leadership

With FieldFox, you’re carrying the precision of our industry-standard benchtop analyzers. By delivering levels of consistency not available in any other handhelds, FieldFox ensures confidence in your results.

Inside, we leveraged well-tested algorithms from Keysight’s high-performance VNAs. To lighten your load, we simplified calibration by adding built-in standards and eliminating the need to carry calibration kits.

To enhance spectrum analysis, FieldFox includes the same PowerSuite measurements used in Keysight X-Series signal analyzers, enabling fast, accurate, one- button characterization of channelized communication systems. The InstAlign capability lets you instantly make accurate power measurements in the field, even when temperature fluctuates.

FieldFox industry innovations

First 50 GHz handheld microwave analyzer

Cable and antenna analyzer

DTF and TDR in a single sweep

Vector network analyzer

Dynamic range up to 100 dB

Spectrum analyzer

Absolute amplitude accuracy ± 0.5 dB

Increase System Uptime and Reduce Mission Risk

Install and maintain cellular systems with the cable and antenna (CAT) tester

  • Ensure communication continuity with all the essential measurements needed to troubleshoot and maintain microwave links
  • Increase your team’s preparedness in the harshest environments with a completely sealed instrument rugged enough to meet MIL specs
  • Always be at the ready with an instrument display easily optimized for clear viewing in direct sunlight or darkness
  • Reduce measurement complexity and time-to-repair with quick and accurate line sweeps in the field without calibration kits
  • Protect your investment by adding software license key upgrades as your needs change

Work better and faster in radar installation and maintenance (I&M)

  • Improve your team’s efficiency with a single analyzer that provides network, spectrum, and power measurements up through the Ka and Q bands
  • Increase your confidence with system and component measurements that agree with trusted Keysight/Agilent/HP benchtop instruments
  • Ensure your team’s readiness with an instrument rugged enough to meet MIL-PRF28800F Class 2 and IP53 specs
  • Increase system uptime and reduce mission risk with fast and accurate characterization of cables, waveguides, and components
  • Reduce your cost of ownership, with only one instrument to purchase and maintain

Accelerate I&M work at satellite ground stations

  • Validate system performance with fast, detailed analysis of up uplink and downlink signals
  • Maintain cable, waveguide, and antenna systems consistently and efficiently with calibrated VNA and CAT measurements
  • Quickly diagnose faults using built-in cable and antenna analysis, network analysis, and power measurements
  • Perform accurate frequency translation gain/loss measurements to verify upconverters and downconverters at the LRU level
  • Depend on MIL-spec ruggedness and a completely sealed instrument, designed to withstand harsh environments


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