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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 25 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 RF analyzer in the field with convenient, user-installable license keys.

The Industry's Most Integrated Handheld RF 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.
  • Configure FieldFox as a cable and antenna analyzer (CAT), handheld vector network analyzer (VNA), handheld spectrum analyzer, or an all-in-one combination RF analyzer.
  • Get frequency 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.
  • FieldFox Handheld RF Analyzer with RTSA

  • FieldFox Handheld Antenna Analyzer measuring s-parameters

  • FieldFox RF Analyzer with RTSA

  • FieldFox Handheld Antenna Analyzer back view

Get to Know the FieldFox Handheld RF Analyzer

FieldFox RF Analyzer Software

Offering 25+ license-key activated software applications.

Interference RF Analyzer and Spectogram software screenshot

Spectrum Analysis

  • Real-time spectrum analyzer (RTSA)
  • Analog demodulation
  • Interference hunting
  • IQ analyzer
antenna analyzer 2 port s parameters software screenshot

Cable and Antenna Testing (CAT)

  • Vector network analysis (VNA)
  • 2 port S-parameters
  • TDR Cable Measurements
RTSA Interference hunting on FieldFox Handheld RF Analyzer

5G / LTE Field Testing

  • EMF Measurements
  • Over-the-air (OTA) testing
  • Channel Scanner
  • Wideband Analysis
Pulse Measurement with USB Peak Power Sensor software

Power Measurements

  • USB Power Sensor Measurements
  • Built-in Power Meter
  • Pulse Measurements
  • Peak Power Sensor
RF Analyzer Indoor and Outdoor Mapping for data collection

Utilities

  • Remote Control
  • GPS Receiver
  • Indoor/Outdoor Mapping
  • DC Bias Variable Voltage Source
Explore All FieldFox Software

What's New With FieldFox Handheld RF Analyzers?

Easily capture signals with FieldFox handheld spectrum analyzers

Interference Hunting

Identify and locate the source of unwanted emitters and interfering signals with real-time spectrum analysis.

Learn More
Control you spectrum by pairing Keysight Spectrum Management Software with FieldFox handheld RF analyzers

Keysight Spectrum Monitoring Software (KSMS)

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

Explore KSMS
Hunt down elusive signals with FieldFox handheld RF analyzers

Fox Hunt

Join this 9-part video series on hunting down elusive signals in the field with the FieldFox handheld RF analyzer.

Watch Video Series
Woman in keysight lab with FieldFox handheld RF analyzer and EMF antenna

5G Field Testing Course

Explore path loss, electromagnetic field (EMF) measurements, and 5G NR over-the-air (OTA) demodulation with RTSA.

View Video Course
Time Difference of Arrival (TDOA) solution using three FieldFox RF analyzers and KSMS software

Time Difference of Arrival (TDOA) with KSMS

TDOA is an emerging directional finding technique providing accurate results with as little as ten meters of uncertainty.

Using this direction finding method, several FieldFox RF analyzers in separate geographical locations with synchronized GPS signals can determine the location of an unknown signal source.

Detect, locate, and mitigate interference issues.

Learn More About TDOA

Real-Time Spectrum Analysis At Your Fingertips

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  • Experience duration: 3 mins
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Request a Live Demo

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  • Self-serve? No
  • Experience duration: 30 mins

Request a Free Trial

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  • Self-serve? Yes
  • Experience duration: 30 days
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Find the Model That is Right for You

View All Models

Already own one of these products? Visit Technical Support
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N9914A
N9914A FieldFox Handheld RF Analyzer, 6.5 GHz 
Starting from  
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 30 kHz
Maximum Frequency: 6.5 GHz
SA Start Frequency: 5 kHz
Additional CAT/VNA Based Features:
QuickCal (Subset)
DTF/TDR Cable Measurements
Mixed-Mode S-Parameters
Vector Voltmeter
N9914B
N9914B FieldFox Handheld RF Analyzer, 6.5 GHz 
Starting from  
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 30 kHz
Maximum Frequency: 6.5 GHz
SA Start Frequency: 5 kHz
Additional CAT/VNA Based Features:
Mixed-Mode S-Parameters
DTF/TDR Cable Measurements
Vector Voltmeter
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FieldFox Handheld RF Analyzers Featured Resources

Technical Overviews 2024.01.14

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.

2024.01.14

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

Data Sheets 2024.03.05

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

2024.03.05

Data Sheets 2023.11.29

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

The FieldFox datasheet update includes new B model versions.

2023.11.29

Configuration Guides 2024.03.06

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.

2024.03.06

Solution Briefs 2023.03.21

FieldFox Microwave Analyzers Portable Satellite Test Solution for Field and Lab Applications

FieldFox Microwave Analyzers Portable Satellite Test Solution for Field and Lab Applications

Learn how to install, maintain, and troubleshoot satellite ground stations and end-user terminals that support satellite networks. Our brief describes a portable, accurate RF satellite test solution based on the FieldFox microwave analyzer. It verifies the performance of amplifiers, frequency converters, over-the-air (OTA) signal quality, transmit power, and more.

2023.03.21

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 2022.11.22

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).

2022.11.22

Application Notes 2023.12.11

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.

2023.12.11

Flyers 2024.02.06

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.

2024.02.06

View All Resources

View All Resources

Extend Your Capabilities with the Right Tools

Get more functionality out of your FieldFox Handheld RF Analyzer today by pairing it with the right accessories.

FieldFox Handheld RF Analyzer FAQs

FieldFox is the industry's first 50 GHz handheld RF analyzer. The Swiss army knife of electrical measurement, FieldFox functions as a vector network analyzer (VNA), cable and antenna analyzer (CAT), spectrum analyzer (SA), or an all-in-one combination RF analyzer.

An RF analyzer is a test instrument capable of combining vector network analysis, spectrum analysis, and cable and antenna testing of radio frequency signals. Network analysis characterizes the response of a device or circuit to RF signals, while spectrum analysis measures the frequency, power, and noise of a signal. Analyzers treat the device under test (DUT) as an electrical network to measure how the DUT alters radio frequency signals through interaction.

RF analyzers provide spectrum and network analysis on RF devices and the characterization of parameters such as:

  • RF signal amplitude at different frequencies
  • scattering parameters (S-parameters)
  • impedance of the overall network
  • gain in RF signal power
  • return and insertion losses
  • signal phase shifts

 

FieldFox provides benchtop accuracy in a portable package. Built to withstand your toughest working environments, FieldFox is rugged enough to meet MIL specs and enables 5G, satellite, and radar operators to make true RF coverage measurements up to 54 GHz and beyond. Lightweight, rugged, and portable, FieldFox is ready to meet your RF test needs. For more information on the world’s most integrated handheld analyzer, see our technical overview.

Network analyzers verify the performance of various components such as antennas, amplifiers, cables, and many other active or passive devices. Network analyzers tend to be sensitive equipment, but many network measurements involve devices that live outside the laboratory. Because of this, having a handheld analyzer to carry with you into the field is extremely valuable.

Yes, you can configure FieldFox as a cable and antenna analyzer (CAT), vector network analyzer (VNA), spectrum analyzer (SA), or an all-in-one combination RF analyzer. With the FieldFox, you can make 5G field test measurements with wide analysis bandwidth up to 120 MHz.

The key network analyzer functions of FieldFox are pulse measurements, TDR (Time Domain Reflectometry), cable measurements, QuickCal, and full 2-port S-parameters.

There are six essential field tests for 5G networks. These include (1) path loss characterization; (2) base station coverage testing; (3) component carrier power measurements; (4) over-the-air control channel coverage testing; (5) network quality and beam performance verification; and (6) EMF exposure evaluation. To learn more about using FieldFox to perform 5G field testing, check out our eBook: Essential 5G Field Tests or view this short course: How to test 5G networks in the field.  

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