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Highlights

Unparalleled flexibility to match your exact analysis needs

With fully upgradable and license-key activated frequency, bandwidth, and over 20 software applications, easily customize your analysis to your requirements. Mix and match VNA and SA frequencies, and effortlessly upgrade the capabilities of your analyzer as your needs change. Choose the FieldFox software-defined configuration that best meets your needs.

  • Select from cable and antenna analyzer (CAT), Vector Network Analyzer (VNA), and/or Spectrum Analyzer with desired maximum frequency.
  • Capture elusive signals with up to 40 MHz gap-free, real-time bandwidth.
  • Measure all four S-parameters simultaneously with 115 dB dynamic range.
  • Make accurate spectrum analyzer measurements (± 0.3 dB) without warmup.
  • Perform over-the-air measurements for 5G NR and LTE.
  • Use GPS/GNSS for geolocation and timestamping.
  • Carry one lightweight unit at 3.4 kg (7.4 lb).

What's included:

  • AC/DC adapter
  • Localized power cord
  • Rechargeable Li-ion battery
  • Soft carrying case with backpack and shoulder straps
  • Quick Reference Guide
View Technical Overview
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N9912C FieldFox Handheld Software

Make your FieldFox handheld analyzer more capable with convenient software upgrades — engineered to deliver precise measurements in the field.

  • Carry one portable instrument that handles routine maintenance and in-depth troubleshooting.
  • Configure as a VNA, spectrum analyzer, built-in power meter, vector voltmeter, and more.
  • Order software pre-installed or upgrade an existing instrument.
N9912C FieldFox Handheld Software
FieldFox C-Models

Interested in an N9912C?

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Accelerate the Win with KeysightCare​

As the complexity of digital and RF tests increases, elevate the productivity of your engineering teams by providing priority access to industry-leading technical experts, a comprehensive knowledge center, and committed turnaround times for repair and calibration. The instruments featured on this page include one year of KeysightCare Assured with the option to upgrade to a 3-5 year service plan. Advance your workflow with KeysightCare.  ​

  • ​Committed response time for technical support as low as 2 business hours​
  • Committed repair & calibration turnaround times as low as 5 business days​
  • Worldwide KeysightCare service and support

Data Sheet

KeysightCare Uptime, Precision, Expertise. At Your Service.

KeysightCare Lab

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Featured Resources

Data Sheets 2024.08.21

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

The FieldFox datasheet update includes new C model versions.

2024.08.21

Technical Overviews 2024.07.21

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

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.

2024.07.21

Configuration Guides 2024.07.29

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 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.

2024.07.29

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 2023.03.19

Techniques for Time Domain Measurements

Techniques for Time Domain Measurements

This application note will introduce time domain and DTF measurement techniques for identifying the location and relative amplitudes of discontinuities while operating in the field.

2023.03.19

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

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