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 Keysight FieldFox configuration that best meets your needs.

  • Configure as a full, two-port VNA, time-domain reflectometer, vector voltmeter, cable and antenna analyzer, and more.
  • Measure all four S-parameters simultaneously with a single connection and up to 90 dB of dynamic range.
  • Perform accurate testing with QuickCal, full two-port unknown thru Cal, and Thru, Reflect, Line (TRL) calibration in the field.
  • Measure average and pulse power easily with a USB power sensor.
  • Carry the lightest handheld VNA at only 2.8 kg (6.2 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 or 6 GHz
Number of Built-In Ports
Maximum Frequency
2 ports
4 or 6 GHz
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Additional CAT/VNA Based Features:
QuickCal (Subset)
DTF/TDR Cable Measurements
Mixed-Mode S-Parameters
Vector Voltmeter
Additional SA Based Features:
Built-In Power Meter
Cable Trimming
Return Loss
Insertion Loss/Gain
Power Measurements
Best Speed at 201 Point, 1 Sweep:
240 ms
Cable and Antenna Analyzer:
Yes - Optional
75 Ohm CATV Devices
Dynamic Range:
100 dB
Instrument Type:
Vector Network Analyzer
Maximum Frequency:
4 or 6 GHz
Minimum Frequency:
2 MHz
Number of Built-In Ports:
2 ports
Output Power:
Up to 5 dBm
Spectrum Analyzer:
System Features:
GPS Receiver - External Only
Remote Control Capability
Built-In DC Source
Trace Noise:
0.008 dB rms
Vector Network Analyzer:
Yes - Standard

N9923A 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, built-in power meter, vector voltmeter, and more.
  • Order software pre-installed or upgrade an existing instrument.


Instrument Control Software

  • Easily connect and control your handheld analyzer with no programming.
  • Acquire screen images and trace data in a few clicks.
  • Rapidly build custom automated test sequences in minutes.
  • Includes Application Programming Interfaces (APIs) for instrument  control from your PC.

Interested in the N9923A?

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