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Meet the newest members of the FieldFox family here.

The Industry's Most Integrated Handheld Analyzer

Keysight's FieldFox portable analyzers are equipped to handle your toughest working environments during routine maintenance, in-depth troubleshooting, and anything in between. Choose the software-enabled Keysight FieldFox configuration that best meets your needs.

  • Get frequency coverage up to 54 GHz with precision comparable to benchtop results.
  • Configure FieldFox as a cable and antenna analyzer (CAT), vector network analyzer (VNA), spectrum analyzer, or an all-in-one combination analyzer.
  • 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

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.

  • CAT measures insertion loss, return loss, cable loss, distance-to-fault, and time-domain reflectometry
  • Full 2-port VNA measures all four S-parameters, magnitude and phase, time-domain analysis, and mixed-mode
  • Spectrum analyzer includes 5G NR and LTE over-the-air coverage/quality testing, channel power measurements, extended range transmission analysis, and RTSA
  • Additional functions include a power meter, vector voltmeter, I/Q analyzer, and more

Find the Model That is Right for You

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N9913A
N9913A FieldFox Handheld Microwave Analyzer, 4 GHz
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 30 kHz
Maximum Frequency: 4 GHz
SA Start Frequency: 5 kHz
Instrument Type: Combination Analyzer
Additional CAT/VNA Based Features:
Mixed-Mode S-Parameters
DTF/TDR Cable Measurements
Vector Voltmeter
Starting from  
N9918B
N9918B FieldFox Handheld Microwave Analyzer, 26.5 GHz
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 30 kHz
Maximum Frequency: 26.5 GHz
SA Start Frequency: 5 kHz
Instrument Type: Handheld
Additional CAT/VNA Based Features:
Mixed-Mode S-Parameters
DTF/TDR Cable Measurements
Vector Voltmeter
Starting from  
N9936B
N9936B FieldFox Handheld Microwave Spectrum Analyzer, 14 GHz
Vector Network Analyzer: No
Cable and Antenna Analyzer: No
Spectrum Analyzer: Yes - Standard
Minimum Frequency: n/a
Maximum Frequency: 14 GHz
SA Start Frequency: 5 kHz
Instrument Type: Spectrum Analyzer
Additional CAT/VNA Based Features: n/a
Starting from  
N9950A
N9950A FieldFox Handheld Microwave Analyzer, 32 GHz
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 300 kHz
Maximum Frequency: 32 GHz
SA Start Frequency: 5 kHz
Instrument Type: Combination Analyzer
Additional CAT/VNA Based Features:
Mixed-Mode S-Parameters
DTF/TDR Cable Measurements
Vector Voltmeter
Starting from  
N9952B
N9952B FieldFox Handheld Microwave Analyzer, 50 GHz
Vector Network Analyzer: n/a
Cable and Antenna Analyzer: n/a
Spectrum Analyzer: n/a
Minimum Frequency: n/a
Maximum Frequency: n/a
SA Start Frequency: n/a
Instrument Type: n/a
Additional CAT/VNA Based Features: n/a
Starting from  
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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 Keysight PathWave design and test automation software to accelerate your product development.

Protect Your Innovation Investment

Featured Resources

Data Sheets 2021.01.25

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.

2021.01.25

Data Sheets 2021.03.14

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

FieldFox datasheet update includes new B model versions.

2021.03.14

Technical Overviews 2020.03.01

FieldFox Handheld Analyzers A-Series Technical Overview - 4/6.5/9/14/18/26.5/32/44/50 GHz

FieldFox Handheld Analyzers A-Series Technical Overview - 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.

2020.03.01

Technical Overviews 2021.03.14

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.

2021.03.14

Configuration Guides 2021.03.29

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

This comprehensive handheld analyzer is here to meet your measurement needs, delivering measurement precision whenever and wherever you need it. Carry the precision of our next generation microwave model, that delivers breakthrough performance and a customer focused design to help drive your innovation.

2021.03.29

eBooks 2021.03.12

Six Essential 5G Field Tests Using FieldFox Handheld Analyzers

Six Essential 5G Field Tests Using FieldFox Handheld Analyzers

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

2021.03.12

White Papers 2020.05.21

Four Measurements You Can Perform on the Go

Four Measurements You Can Perform on the Go

This white paper discusses the importance of commonly made radio frequency field measurements: real-time spectrum analysis (RTSA), noise figure, over-the-air measurements (OTA), and cable and antenna test (CAT).

2020.05.21

Application Notes 2020.04.01

Transmission Lines and Reflected Signals

Transmission Lines and Reflected Signals

FieldFox Fundamentals — Lesson 3. Learn the basics of transmission lines and reflected signals with some practice measurements of the reflection coefficient using a FieldFox handheld analyzer.

2020.04.01

View All Resources

View All Resources

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