products details

Home Products

N9951B FieldFox Handheld Microwave Analyzer 44 GHz with 120 MHz Real-Time Bandwidth and Lightweight Design

Name: N9951B FieldFox Handheld Microwave Analyzer 44 GHz with 120 MHz Real-Time Bandwidth and Lightweight Design
Brand: Shenzhen Meigaolan Electronic Instrument Co. Ltd
SKU: N9951B
Availability: InStock

Brand Name:	Keysight （Agilent）
Model Number:	N9951B
MOQ:	1
Price:	Negotiation
Delivery Time:	5~8 Working Days
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

USA

Certification:

ISO17025

Ports:

Maximum Frequency:

44 GHz

Product Name:

FieldFox Handheld Microwave Analyzer

Condition:

Pre-Owned

Functions:

Tested, In Full Working Conditions

Packaging Details:

Carton

Supply Ability:

In Stock

Highlight:

Handheld Keysight Fieldfox Spectrum Analyzer

44 GHz Keysight Fieldfox Spectrum Analyzer

44 GHz Fieldfox Spectrum Analyzer

Product Description

N9951B FieldFox Handheld Microwave Analyzer, 44 GHz for Customizable Microwave Measurements

Product Overview

The N9951B FieldFox Handheld Microwave Analyzer is a lightweight, durable, software-enabled instrument that combines cable and antenna analyzer, spectrum analyzer, network analyzer, and more in one portable unit.

Keysight's FieldFox portable analyzers are designed to handle demanding working environments during routine maintenance, in-depth troubleshooting, and various field applications. Choose the software-enabled FieldFox configuration that best meets your measurement needs.

Key Features

Base model includes cable and antenna tester (CAT)
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
Lightweight unit at only 3.4 kg (7.4 lb)
Software-defined measurement functions customizable 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

Technical Specifications

Specification	Details
Additional CAT/VNA Based Features	Mixed-Mode S-Parameters
Applications	AM/FM Tune and Listen, Cable and Antenna Analysis, Field Strength Measurement, SCPI Code Compatibility, Spectrogram, Stimulus Response, 89600 VSA Software, Over-The-Air LTE FDD and 5GTF, 5G NR
Bandwidth Options	10 MHz/40 MHz/120 MHz
Cable and Antenna Analyzer	Yes - Standard
Form Factor	Handheld
Instrument Type	Combination Analyzer
Maximum Frequency	44 GHz
Measurement Functions	Network analysis/Signal analysis/Cable and antenna tester/Real-time spectrum analysis
Number of Built-In Ports	2
Overall Amplitude Accuracy	±0.2 dB
Phase Noise @1 GHz (1 MHz offset)	125 dBc/Hz
Phase Noise @1 GHz (30 kHz offset)	-114 dBc/Hz
SA Start Frequency	5 kHz
Spur Free Dynamic Range	>104 dB
Standard Attenuator Step	5 dB
System Dynamic Range	>105 dB
Trace Noise	0.001 dB
Vector Network Analyzer	Yes - Optional

Available Options

Option Code	Description
N9951B-010	Vector network analyzer time domain
N9951B-030	Remote control capability
N9951B-208	USB power sensor measurements versus frequency
N9951B-209	Extended range transmission analysis (ERTA)
N9951B-210	Vector network analyzer transmission/reflection
N9951B-211	Vector network analyzer full 2-port S-parameters
N9951B-212	1-port mixed-mode S-parameters
N9951B-215	TDR cable measurements
N9951B-233	Spectrum analyzer
N9951B-235	Pre-amplifier
N9951B-236	Interference analyzer and spectrogram
N9951B-238	Spectrum analyzer time gating
N9951B-302	USB power sensor support
N9951B-307	GPS receiver
N9951B-308	Vector voltmeter
N9951B-309	DC bias variable-voltage source
N9951B-310	Built-in power meter
N9951B-312	Channel scanner
N9951B-330	Pulse measurements
N9951B-350	Real-time spectrum analyzer (RTSA)
N9951B-351	I/Q analyzer
N9951B-352	Indoor and outdoor mapping
N9951B-353	IQ streaming
N9951B-355	Analog demodulation
N9951B-356	Noise figure measurements
N9951B-358	EMF measurements
N9951B-361	EMI measurements
N9951B-370	Over the air LTE FDD measurements
N9951B-377	Over the air 5G TF measurements
N9951B-378	Over-the-air (OTA) 5G NR measurements
N9951B-371	Over-the-air (OTA) 5G NR measurements

Our Service

One-stop service from manufacture to shipping
Your inquiry related to our products or prices will be replied within 24 hours
Well-trained and experienced staff to answer all your inquiries in fluent English
Distributor support offered for your unique design and some current models
Protection of your sales area, design ideas, and all private information

Frequently Asked Questions

Can you ship orders to Canada or Australia?

Yes, we can. We send orders worldwide.

What delivery method do you use and what is the delivery time?

We can ship by EMS, DHL, FedEx, UPS, TNT with tracking number. Usual delivery time is 4-7 workdays.

What is your payment term?

100% T/T payment before shipment.

How can I ask any other questions?

You can contact us online or leave us messages below.

Product Images

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

All Reviews

Emily

France Jan 20.2026

Helpful (3)

Good condition, nice service

United States Oct 16.2025

Helpful (2)

Nice seller, Good device.

L*y

France Oct 17.2024

Helpful (5)

good working condition

Tags:

RF Spectrum Analyzer

Signal Spectrum Analyzer

Optical Spectrum Analyzer

Vector Network Analyzer

RF Signal Generator

RF Communications Test Set

Mixed Signal Oscilloscope

AC DC Variable Power Supply

RF Power Meter

Multi Function Calibrator

EMC Test System

Electronic Test And Measurement Equipment

EMC Test Equipment

RF Power Sensor