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Highlights

The N8974B high performance noise figure analyzer is designed to make fast, accurate and repeatable noise figure measurements. When paired with an SNS Series noise source and U7227 Series USB preamplifier the ENR data from the SNS and USB preamplifier data automatically downloads into the N8974B. The N8974B has a multi-touch interface that allows stretch, pinch, and drag gestures. Most menus can be accessed with the tap of a finger without changing screens.

Noise source calibrations for Y-Factor measurements have been streamlined by allowing combined calibrations for up to 12 DUT setups in a single step. Saving valuable test time can be achieved for many types of DUT’s by using the internal calibration feature, which does not require a user calibration to be performed.

A built-in noise figure uncertainty calculator can prepopulate data from the SNS noise source, USB preamplifier, as well as all the required instrument parameters such as analyzer noise figure, gain and noise figure uncertainty, and match. Default noise figure settings offer simultaneous noise figure and gain measurements. By using Table view several measurements including Noise Figure, Noise Factor, Y-Factor, Gain, Phot, Pcold, and Teffective can be viewed simultaneously in tabular form.

  • Frequency range 10 MHz to 7 GHz in a one-box solution
  • Multi-touch interface
  • Includes Spectrum Analyzer and IQ Analyzer (Basic) modes
  • Built-in standard options include P07, PFR, FSA, NFE, and B25
  • N-type (f) input connector
  • SNS series noise source compatibility
  • U7227C 100 MHz to 26.5 GHz External USB Preamplifier included

Key Specifications

Download Data Sheet
Maximum Frequency
7 GHz
Maximum Frequency
7 GHz
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Bandwidth:
8 MHz
Frequency Range:
10 MHz to 7 GHz
Gain Uncertainty:
±0.15 dB
Instrument Uncertainty:
±0.02 dB using a 4-6 dB ENR Noise Source
Maximum Frequency:
7 GHz
Measurement Functions:
Noise Figure
Noise Factor
Y-Factor
Gain
Minimum Frequency:
10 MHz
Minimum Frequency Range:
10 MHz
Speed:
18.3 ms/measurement
N8976B high performance noise figure analyzer

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Extend the capabilities for your Noise Figure Analyzer, Multi-touch, 10 MHz to 7 GHz

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Featured Resources for N8974B Noise Figure Analyzer, Multi-touch, 10 MHz to 7 GHz

Data Sheets 2020.11.24

NFA X-Series Noise Figure Analyzer, Multi-touch N8973B, N8974B, N8975B, N8976B

NFA X-Series Noise Figure Analyzer, Multi-touch N8973B, N8974B, N8975B, N8976B

This data sheet is a summary of the specifications and conditions for NFA X-Series Noise Figure Analyzers.

2020.11.24

Application Notes 2019.09.30

Fundamentals of RF and Microwave Noise Figure Measurements

Fundamentals of RF and Microwave Noise Figure Measurements

Explore information on RF and Microwave noise figure measurements, starting from the concept of noise figure and noise temperature, describing the noise characteristics of two-ports networks, and highlighting the different methods used to measure noise figure, such as Y-Factor and the Direct Noise measurement method.

2019.09.30

Application Notes 2024.10.08

Noise Figure Measurement Accuracy: The Y-Factor Method

Noise Figure Measurement Accuracy: The Y-Factor Method

This app note discusses the fundamentals of noise figure measurement using Y-factor method and how to avoid noise figure mistakes.

2024.10.08

Application Notes 2024.07.04

10 Hints for Making Successful Noise Figure Measurements

10 Hints for Making Successful Noise Figure Measurements

Noise figure is often the key to characterizing a receiver and to detect weak incoming signals. Learn to minimize uncertainties in your noise figure measurements.

2024.07.04

Flyers 2024.12.02

5 Reasons to Buy the X-Series NFA

5 Reasons to Buy the X-Series NFA

This 2-page flyer lists 5 reasons to buy Keysight X-Series noise figure analyzers.

2024.12.02

White Papers 2022.12.26

Three Ways USB Noise Sources Help You Remove Uncertainty in Y-Factor Measurements

Three Ways USB Noise Sources Help You Remove Uncertainty in Y-Factor Measurements

USB noise sources are a fantastic alternative for noise figure measurements because of their ease, reliability, and versatility.

2022.12.26

Technical Overviews 2019.01.05

U1831C USB Noise Source - Technical Overview

U1831C USB Noise Source - Technical Overview

The Keysight U1831C USB noise source is designed to work with NFA-B signal analyzer, X-series signal analyzer and M9191/3A PXIe VSA for an fast and accurate noise figure measurement solution. The USB connectivity that comes with a smart feature of automatically download of electronically stored calibration data and ENR with temperature sensing capability simplify test setup and improved overall measurement accuracy.

2019.01.05

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