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Highlights

Analyze Anywhere with FieldFox Portable Analyzer 

Unleash your analysis potential with high-performance spectrum analysis from 3 kHz to 10 GHz. Choose the software-defined FieldFox configuration that best meets your evolving needs.

  • Capture elusive signals with up to 120 MHz gap-free, real-time bandwidth.
  • 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:

  • Base model: spectrum analyzer (SA)
  • AC/DC adapter
  • Localized power cord
  • Rechargeable Li-ion battery
  • Soft carrying case with backpack and shoulder straps
  • Quick Reference Guide
View Technical Overview

Key Specifications

Download Data Sheet
Number of Built-In Ports
2
Maximum Frequency
10 GHz
Number of Internal Sources
1
VNA Series
FieldFox
VNA Type
Handheld
Number of Built-In Ports
Maximum Frequency
Number of Internal Sources
VNA Series
VNA Type
2
10 GHz
1
FieldFox
Handheld
View More
Applications:
Over-the-Air LTE FDD
5G NR
Over-the-Air LTE FDD
Bandwidth:
120 MHz
Bandwidth Options:
10 MHz
40 MHz
120 MHz
Best Speed at 1001 Point, 1 Sweep:
n/a
DANL @1 GHz:
-164 dBm
Form Factor:
Handheld
Max. Bandwidth:
120 MHz
Maximum Analysis Bandwidth:
120 MHz
Maximum Bandwidth:
120 MHz
Maximum Frequency:
10 GHz
Maximum Real Time Bandwidth:
120 MHz
Measurement Functions:
Signal analysis
Real-time spectrum analysis
Minimum Frequency:
3 kHz
Number of Built-In Ports:
2
Number of Internal Sources:
1
Overall Amplitude Accuracy:
±0.20 dB
Phase Noise @1 GHz (1 MHz offset):
-124 dBc/Hz
Phase Noise @1 GHz (10 kHz offset):
-112 dBc/Hz
Phase Noise @1 GHz (30 kHz offset):
-113 dBc/Hz
SA Start Frequency:
3 kHz
Spectrum Analyzer:
n/a
Standard Attenuator Range:
0 to 40 dB
Standard Attenuator Step:
5 dB/step
System Dynamic Range:
>104 dBc
TOI @1 GHz (3rd Order Intercept):
+10 dBm
Type:
Spectrum Analyzer
VNA Series:
FieldFox
VNA Type:
Handheld

N9935C 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 spectrum analyzer, built-in power meter, vector voltmeter, and more.
  • Order software pre-installed or upgrade an existing instrument.
N9935C FieldFox Handheld Software
FieldFox C-Models

Interested in an N9935C?

Extend the Capabilities

Software
Accessories
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Support
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Featured Resources

Data Sheets 2024.12.19

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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).

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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.

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Application Notes 2019.11.24

Introduction to the FieldFox RF & Microwave Analyzer

Introduction to the FieldFox RF & Microwave Analyzer

FieldFox handheld RF and microwave analyzers are portable, rugged, flexible and lightweight. Learn the key features and fundamentals of Keysight's FieldFox.

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White Papers 2022.11.28

Investigate Interference Issues in the Field with RTSA

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5G Field Testing with FieldFox

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