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What's New With FieldFox?

FieldFox Channel Scanning in car on the go

RF Explained Video Series

Check out the video short series tackling the toughest RF development and deployment challenges.

Watch Video Series
RTSA FieldFox

Keysight Spectrum Monitoring Software (KSMS)

Control your spectrum, measure utilization, and identify interference, all in a single platform.

Learn More About KSMS
Woman in keysight lab with FieldFox handheld analyzer and EMF antenna

5G Field Tests Video Course

  • Path loss and electromagnetic field (EMF) measurements
  • 5G NR over-the-air (OTA) demodulation
  • Interference troubleshooting with RTSA
View Video Course

Industry's Most Integrated Handheld Analyzer

Keysight's FieldFox family of portable analyzers come equipped to handle routine maintenance, in-depth troubleshooting, and anything in between. Choose the software-enabled Keysight FieldFox configuration that best meets your needs.

  • FieldFox B Handheld RF and Microwave Analyzer front left view

  • FieldFox B-Series Handheld RF and Microwave Analyzer front view

  • FieldFox B-Series Handheld RF and Microwave Analyzer front right view

  • FieldFox B-Series Handheld RF and Microwave Analyzer rear view

  • Get coverage up to 54 GHz with precision comparable to benchtop results.
  • Make 5G field test a reality with wide analysis bandwidth up to 120 MHz.
  • Capture small, interfering signals with wideband, real-time analysis.
  • Perform measurements with one of the lightest instruments in the industry — 30% lighter than other handheld analyzers.
  • Configure FieldFox as a cable and antenna analyzer (CAT), vector network analyzer (VNA), spectrum analyzer, or an all-in-one combination analyzer.

Never Sacrifice Capability or Portability

Field testing modern communications networks puts new demands on your equipment and requires trade-offs between capabilities and portability. With over 22 software-enabled measurement capabilities in one portable, battery-powered unit, FieldFox is the most capable handheld analyzer in the industry. Stay ahead of changing measurement requirements by upgrading your handheld analyzer in the field with convenient, user-installable license keys.

handheld spectrum analyzer used in field testing

Find The Model That's Right For You

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N9914A
N9914A FieldFox Handheld RF Analyzer, 6.5 GHz 
Starting from  
N9914A is a portable battery-operated analyzer; base function is a cable and antenna analyzer; configurations also include spectrum and network analyzers; optional built-in power meter and vector voltmeter.
N9914B
N9914B FieldFox Handheld RF Analyzer, 6.5 GHz 
Starting from  
N9914B FieldFox Handheld RF Analyzer, 6.5 GHz is a lightweight cable and antenna analyzer. Capture elusive signals with 120 MHz gap-free, real-time bandwidth.
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Never Miss A Signal

  • Easily capture and demodulate intermittent, beam sweeping technologies used in 5G and radar systems.
  • Detect small signals once masked by stronger signals with RTSA.
  • Measure signals as narrow as 5.52 µs with 100% Probability of Intercept (POI) and full amplitude accuracy.
  • Accelerate communications system development by quickly switching to over-the-air (OTA) measurements.

Extend Your Capabilities With The Right Tools

Get more functionality out of your test instrument today by pairing it with the right accessories to improve productivity and the right PathWave design and test automation software to accelerate your product development.

Protect Your Innovation Investment

Featured Resources

Flyers 2022.05.04

FieldFox Microwave Analyzers B-Series vs. A-Series Specifications

FieldFox Microwave Analyzers B-Series vs. A-Series Specifications

This is a one-pager to compare the key specs among different models within the FieldFox family.

2022.05.04

Data Sheets 2023.12.05

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

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

This document is the FieldFox Data Sheet

2023.12.05

Data Sheets 2023.11.29

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

The FieldFox datasheet update includes new B model versions.

2023.11.29

Technical Overviews 2021.10.31

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

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

Now there’s a rugged, dependable handheld designed to deliver precise, lab-grade measurements up to 50 GHz. Learn more about the FieldFox microwave analyzers.

2021.10.31

Technical Overviews 2023.07.27

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50/54 GHz

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50/54 GHz

Now there’s a rugged, dependable handheld designed to deliver precise, lab-grade measurements up to 50 GHz. Learn more about the FieldFox microwave analyzers.

2023.07.27

Configuration Guides 2023.12.04

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50/54 GHz (B and C models)

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50/54 GHz (B and C models)

This comprehensive handheThe FieldFox handheld analyzer configuration guide provides the potential customers to correctly pick the model and options to best fit their needs in technically and economically. By adding the new information of newly introduced C-Series FieldFox handheld analyzers (Code name Earhart) configuration information, customers can make their best purchase decision on the new C-Series FieldFox and upgrading their existing C-Series FF in later days.

2023.12.04

eBooks 2023.03.16

Six Essential 5G Field Tests Using FieldFox Handheld Analyzers

Six Essential 5G Field Tests Using FieldFox Handheld Analyzers

This eBook explains the six essential 5G field tests FieldFox handheld analyzers perform. Make your 5G transformation smooth with path loss characterization, base station coverage testing, and more.

2023.03.16

White Papers 2022.11.28

Investigate Interference Issues in the Field with RTSA

Investigate Interference Issues in the Field with RTSA

5G Field Testing with FieldFox

2022.11.28

View All Resources

View All Resources

Frequently Asked Questions ‑ FieldFox Handheld Analyzers

What are the benefits of using a handheld spectrum analyzer?

Spectrum analysis primarily measures the frequency, power, and noise of a signal. All of these are essential measurements in the field, where lugging a benchtop analyzer would be difficult. Handheld analyzers are portable, rugged, and lightweight. They are built to last in harsh conditions and overcome sun glare. Bring the solutions out in the field with you and never compromise capability or portability.

Does FieldFox have RTSA capabilities?

Yes, using real-time spectrum analysis (RTSA) up to 50 GHz, FieldFox can capture interfering signals in real-time. With a dynamic density display and high Fast Fourier Transform (FFT) rate, the FieldFox displays gap-free data capture. For more information about FieldFox RTSA, check out our brochure: FieldFox Handheld Analyzers with Real-time Spectrum Analysis (RTSA).  

What spectrum analyzer functions does a FieldFox perform?

The key spectrum analyzer functions of FieldFox are over-the-air (OTA) measurements, real-time spectrum analysis (RTSA), electromagnetic field (EMF) measurements, channel scanning, and noise figure. 

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