Never Sacrifice Capability or Portability

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 FieldFox configuration that best meets your needs.

  • Base model includes a cable and antenna tester (CAT)
  • Add software-defined measurement functions according to your needs.
  • Capture elusive signals with 120 MHz gap-free, real-time bandwidth.
  • Measure all four S-parameters simultaneously with 105 dB dynamic range.
  • Make accurate spectrum analyzer measurements (± 0.2 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).

Key Specifications

Number of Built-In Ports
2 ports
Maximum Frequency
50 GHz
Number of Built-In Ports
Maximum Frequency
2 ports
50 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)
89600 VSA Software
Over-The-Air LTE FDD and 5GTF
Applications-Digital Video:
89600 VSA Software
Applications-General Purpose:
AM/FM Tune and Listen
Cable and Antenna Analysis
Field Strength Measurement
SCPI Code Compatibility
Stimulus Response
Applications-Wireless Connectivity:
89600 VSA Software
Bandwidth Options:
10 standard, 40, 120 MHz
Best Speed at 1001 Point, 1 Sweep:
196 μs/pt
Cable and Antenna Analyzer:
Yes - Standard
DANL @1 GHz:
-163 dBm
Instrument Type:
Combination Analyzer
Maximium Real-time Bandwidth:
120 MHz
Maximum Analysis Bandwidth:
120 MHz
Maximum Frequency:
50 GHz
Maximum Frequency:
50 GHz
Maximum Real-Time Bandwidth:
120 MHz
Minimum Frequency:
300 kHz
Number of Built-In Ports:
2 ports
Number of built-in ports:
2 ports
Output Power:
Up to 7 dBm
Overall Amplitude Accuracy:
+/- 0.2 dB
Overall Amplitude Accuracy:
+/- 0.2 dB
Phase Noise @1 GHz (1 MHz offset):
-125 dBc/Hz
Phase Noise @1 GHz (10 kHz offset):
-114 dBc/Hz
Phase Noise @1 GHz (30 kHz offset):
-114 dBc/Hz
Phase Noise at 1 GHz, 1 MHz offset:
-125 dBc/Hz
Phase Noise at 1 GHz 10 kHz offset:
-114 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
Spur Free Dynamic Range:
> 104 dB
Standard Attenuator Range:
40 dB
Standard Attenuator Step:
5 dB
Standard Attenuator Step:
5 dB
System Dynamic Range:
> 105 dB
System Features:
GPS Receiver - Internal Only
Remote Control Capability
Built-In DC Source
TOI @1 GHz (3rd Order Intercept):
+ 5.1 dBm
Trace Noise:
0.001 dB
Vector Network Analyzer:
Yes - Optional

N9952B FieldFox Handheld Software

Configure your FieldFox handheld analyzer to meet your specific measurement needs with powerful software options engineered to deliver precise measurements in the field.

  • Carry one portable instrument that supports over 25 different measurement functions.
  • 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 89600 VSA.
  • Demodulate and perform comprehensive vector signal analysis to optimize your deployment.
  • Decode and verify MAC, RLC and 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

Interested in the N9952B?

What's Included With Your Purchase

Rechargeable battery, carrying case, and charging ford for FieldFox
  • AC/DC adapter
  • Localized power cord
  • Quick Reference Guide
  • Rechargeable Li-ion battery
  • Soft carrying case with backpack and shoulder straps

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