Handheld Test Tools

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FieldFox Handheld RF Analyzer, up to 10 GHz
FieldFox N9912C
FieldFox Handheld RF Analyzer, up to 10 GHz
FieldFox Handheld Microwave Analyzer, 14 GHz
FieldFox N9916A
FieldFox Handheld Microwave Analyzer, 14 GHz
FieldFox Handheld Microwave Analyzer, 18 GHz
FieldFox N9917A
FieldFox Handheld Microwave Analyzer, 18 GHz
FieldFox Handheld Microwave Analyzer, 26.5 GHz
FieldFox N9918A
FieldFox Handheld Microwave Analyzer, 26.5 GHz
FieldFox Handheld Microwave Spectrum Analyzer, 14 GHz
FieldFox N9936A
FieldFox Handheld Microwave Spectrum Analyzer, 14 GHz
FieldFox Handheld Microwave Spectrum Analyzer, 18 GHz
FieldFox N9937A
FieldFox Handheld Microwave Spectrum Analyzer, 18 GHz
FieldFox Handheld Microwave Spectrum Analyzer, 26.5 GHz
FieldFox N9938A
FieldFox Handheld Microwave Spectrum Analyzer, 26.5 GHz
FieldFox Handheld Microwave Analyzer, 32 GHz
FieldFox N9950A
FieldFox Handheld Microwave Analyzer, 32 GHz
FieldFox Handheld Microwave Analyzer, 44 GHz
FieldFox N9951A
FieldFox Handheld Microwave Analyzer, 44 GHz
FieldFox Handheld Microwave Analyzer, 50 GHz
FieldFox N9952A
FieldFox Handheld Microwave Analyzer, 50 GHz
FieldFox Handheld Microwave Spectrum Analyzer, 32 GHz
FieldFox N9960A
FieldFox Handheld Microwave Spectrum Analyzer, 32 GHz
FieldFox Handheld Microwave Spectrum Analyzer, 44 GHz
FieldFox N9961A
FieldFox Handheld Microwave Spectrum Analyzer, 44 GHz
FieldFox Handheld Microwave Spectrum Analyzer, 50 GHz
FieldFox N9962A
FieldFox Handheld Microwave Spectrum Analyzer, 50 GHz
Handheld Capacitance Meter
ZA1 U1701B
Handheld Capacitance Meter
100Hz / 120Hz / 1kHz Handheld LCR Meter
ZA1 U1731C
100Hz / 120Hz / 1kHz Handheld LCR Meter
100Hz / 120Hz / 1kHz / 10kHz Handheld LCR Meter
ZA1 U1732C
100Hz / 120Hz / 1kHz / 10kHz Handheld LCR Meter
100Hz / 120Hz / 1kHz / 10kHz / 100kHz Handheld LCR Meter
ZA1 U1733C
100Hz / 120Hz / 1kHz / 10kHz / 100kHz Handheld LCR Meter
Handheld RF Power Meter
PM1 V3500A
Handheld RF Power Meter
Handheld Digital Multimeter, 3 ½ Digit, Basic
U1231A
Handheld Digital Multimeter, 3 ½ Digit, Basic
Handheld Digital Multimeter, 3 ½ Digit
U1232A
Handheld Digital Multimeter, 3 ½ Digit
Handheld Digital Multimeter, 3½ Digit
U1233A
Handheld Digital Multimeter, 3½ Digit
Handheld Digital Multimeter, 4 Digit, Basic
U1241B
Handheld Digital Multimeter, 4 Digit, Basic
Handheld Digital Multimeter, 4 Digit, IP67
U1241C
Handheld Digital Multimeter, 4 Digit, IP67
Handheld Digital Multimeter, 4 Digit
U1242B
Handheld Digital Multimeter, 4 Digit
Handheld Digital Multimeter, 4 Digit, IP67
U1242C
Handheld Digital Multimeter, 4 Digit, IP67
Handheld Digital Multimeter, 4 ½ Digit, Basic
U1251B
Handheld Digital Multimeter, 4 ½ Digit, Basic
Handheld Digital Multimeter, 4 ½ Digit
U1252B
Handheld Digital Multimeter, 4 ½ Digit
Handheld Digital Multimeter, 4 ½ Digit, OLED Display
U1253B
Handheld Digital Multimeter, 4 ½ Digit, OLED Display
Handheld Digital Multimeter, 4 ½ Digit, IP67
U1281A
Handheld Digital Multimeter, 4 ½ Digit, IP67
Handheld Digital Multimeter, 4½ Digit, IP67
U1282A
Handheld Digital Multimeter, 4½ Digit, IP67
FieldFox N9951A - FieldFox Handheld Microwave Analyzer, 44 GHz

Never Sacrifice Capability Or Portability

Keysight's FieldFox handheld 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.

  • Standard model includes cable and antenna analyzer.
  • Expand capabilities with optional VNA, spectrum analyzer, built-in power meter, vector voltmeter, and more.
  • Save time by measuring DTF and TDR in the same sweep.
  • Measure all four S-parameters simultaneously.
  • Make accurate spectrum analyzer measurements (± 0.5 dB) without warm-up.
  • Calibrate easily with QuickCal.
  • Use the industry's lightest all-in-one analyzer at only 3.2 kg (7.1 lb).

What's included:

  • AC/DC adapter
  • Localized power cord
  • Rechargeable Li-ion battery
  • Soft carrying case with backpack and shoulder strap
  • Quick Reference Guide
Calibration & Warranty
R-51B-001-Z Return to Keysight Warranty - 3 years
R-51B-OC Return to service center warranty and service plan
R1280A Return to Keysight service center - warranty and service plan
Additional Material
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Over-the-Air Performance Measurement - 5G (Application Note)
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Precise Cable and Antenna Measurement Techniques in the Field (Application Note)
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Specifying Calibration Standards and Kits for Keysight Vector Network Analyzers (Application Note)
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Techniques for Precise Interference Measurements in the Field (Application Note)
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Techniques for Precise Cable and Antenna Measurements in the Field (Application Note)
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Techniques for Time Domain Measurements (Application Note)
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Precise Measurement Calibrations in the Field (Application Note)
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Correlating Microwave Measurements between Benchtop and Handheld Analyzers (Application Note)
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Average and Peak Power Testing in the Field with the FieldFox (Application Note)
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Validation of Radar System Performance in the Field (Application Note)
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Techniques for Advanced Cable Testing (Application Note)
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Satellite Earth Stations: Validation, Maintenance and Repair (Application Note)
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Overcoming RF and Microwave Interference Challenges (Application Note)
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Using FieldFox Analyzers with Mass Storage Devices (Application Note)
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Automotive System Verification and Troubleshooting (Application Note)
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5G Over-the-Air Performance Measurement and Evaluation (Application Note)
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FieldFox Handheld Analyzers with Real-time Spectrum Analysis (RTSA) (Brochure)
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New radiated emission measurement and analysis software "EPX/RE" (Brochure)
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FieldFox Handheld Analyzer Software (Brochure)
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Keysight Technologies Carry precision with you! - FieldFox - (Flyer)
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Five Reasons Why FieldFox Is the Ideal Satellite Ground Station Maintenance Companion (Flyer)
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FieldFox Microwave Analyzers, 4/6.5/9/14/18/26.5/32/44/50 GHz – Product Fact Sheet (Product Fact Sheet)
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FieldFox A/B/C/D-Series Quick Start Guide (Quick Start Guide)
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FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50 GHz (Technical Overview)
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FieldFox Handheld Analyzers (Technical Overview)
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5G mmW Air Interface Characterization with Phased Array Antenna (Technical Overview)
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Demystifying Five Everyday RF Measurements (Webinar)
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Investigate Interference Issues in the Field with RTSA - FieldFox (White Paper)
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Rental Partners - Four FieldFox Measurements You Can Perform on the Go (White Paper)
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Investigate Interference Issues in the Field (White Paper)
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Four Measurements You Can Perform on the Go (White Paper)
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Smarter Airports: Field Assurance for Airports and Air Traffic Control Systems (White Paper)
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Innovative Use Cases for Handheld Analyzers in the Medical Field (White Paper)