Never Sacrifice Capability or Portability

Keysight's N9913B FieldFox Handheld RF Analyzer are equipped to handle your toughest working environments during routine maintenance, in-depth troubleshooting, and anything in between. Choose the Keysight FieldFox configuration that best meets your needs.

  • Standard model includes cable and antenna analyzer (CAT).
  • Capture elusive signals with 120 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

Key Specifications

Number of Built-In Ports
2 ports
Maximum Frequency
4 GHz
Number of Built-In Ports
Maximum Frequency
2 ports
4 GHz
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Additional CAT/VNA Based Features:
Mixed-Mode S-Parameters
DTF/TDR Cable Measurements
Vector Voltmeter
Additional SA Based Features:
Real-Time Spectrum Analysis
Noise Figure Measurements
Over-The-Air Measurements
Built-In Power Meter
Extended Range Transmission Analysis (ERTA)
AM/FM Tune and Listen
Cable and Antenna Analysis
Field Strength Measurement
SCPI Code Compatibility
Stimulus Response
89600 VSA Software
Over-The-Air LTE FDD and 5GTF
110 MHz
Bandwidth Options:
10 MHz
40 MHz
120 MHz
Best Speed at 1001 Point, 1 Sweep:
171 us/pt
Cable and Antenna Analyzer:
Yes - Standard
DANL @1 GHz:
-163 dBm
Form Factor:
Instrument Type:
Combination Analyzer
Maximum Analysis Bandwidth:
120 MHz
Maximum Frequency:
4 GHz
Maximum Real-Time Bandwidth:
120 MHz
Measurement Functions:
Network analysis
Signal analysis
Cable and antenna tester
Real-time spectrum analysis
Minimum Frequency:
30 kHz
Number of Built-In Ports:
2 ports
Output Power:
Up to 1 dBm
Overall Amplitude Accuracy:
±0.2 dB
Phase Noise @1 GHz (1 MHz offset):
-124 dBc/Hz
Phase Noise @1 GHz (10 kHz offset):
-117 dBc/Hz
Phase Noise @1 GHz (30 kHz offset):
-115 dBc/Hz
Power Measurement Using USB Sensor:
CW or Swept-Frequency
RF Pulse Test with Peak Sensor
SA Start Frequency:
5 kHz
Spectrum Analyzer:
Yes - Optional
Standard Attenuator Range:
40 dB
Standard Attenuator Step:
5 dB
System Dynamic Range:
> 114 dB
System Features:
GPS Receiver - Internal Only
Remote Control Capability
Built-In DC Source
TOI @1 GHz (3rd Order Intercept):
+11 dBm
Trace Noise:
0.0008 dB rms
Vector Network Analyzer:
Yes - Optional
N9913B FieldFox Handheld RF Analyzer

N9913B 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.

PathWave Vector Signal Analysis (89600 VSA) Software

  • Record signals in the field and evaluate them later using VSA 89600.
  • Demodulate and perform comprehensive vector signal analysis to optimize your deployment.
  • Decode and verify MAC, RLC & RRC-layer messages across multiple radio frames.
  • Analyze and troubleshoot signals in cellular, wireless-connectivity, aerospace, defense, and general-purpose applications.


PathWave Vector Signal Analysis Software

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