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Noise Sources

The Keysight 346, 347, SNS and USB Series of noise sources work in conjunction with the NFA Series noise-figure analyzers to make noise-figure measurements from 10 MHz to 50 GHz.

Noise Source Support
Y-Factor Instruments SNS Series 346 Series 347 Series USB Smart Noise Source
CXA X X X X
EXA X X X X
MXA X X X X
PXA X X X X
UXA X X X
NFA X X X X
M9391A PXIe Vector Signal Analyzers X X X X
M9393A PXIe Performance Vector Signal Analyzers X X X X
FieldFox Handheld Analyzers - X - -
Cold-Source Instruments
PNA-X - X - -
PXIe Vector Network Analyzers - X - -

Compare All Noise Sources (12)

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Q347B Millimeter-Wave Noise Source, Q-Band - Data Sheet
This data sheet provides specifications for the Q-band R347B millimeter-wave noise source.

Data Sheet 2019-03-20

PDF PDF 1019 KB
R347B Millimeter-Wave Noise Source, R-Band
This data sheet provides specifications for the R-band R347B millimeter-wave noise source.

Data Sheet 2019-03-20

PDF PDF 1018 KB
Noise Figure Measurement Accuracy - The Y-Factor Method - Application Note
Specific to instruments that use the Y-factor method for noise figure measurements, this app note discusses measurement basics, avoidable errors, loss and temperature corrections, and uncertainties.

Application Note 2019-03-19

N4000 SNS Series Noise Source 3D Model, STEP format
This is STEP format 3D Model of the N4000A, N4001A, N4002A.

Reference Guide 2018-11-23

ZIP ZIP 370 KB
R/Q347B Noise Source Operating and Service Manual
Operating and service information for the R/Q347B noise source products.

Service Manual 2018-10-02

PDF PDF 1.01 MB
346A, 346B, 346C Noise Source 3D Model, STEP format
This is STEP format 3D Model of the 346A, 346B and 346C.

Reference Guide 2018-09-12

ZIP ZIP 141 KB
U1831C USB Smart Noise Source User's Guide
This provides information on installation, specification, operating guide, and safety and regulatory of the product.

User Manual 2018-06-29

PDF PDF 3.49 MB
U1831C USB Smart Noise Source 3D model drawing
This is product model 3D drawing of U1831C

Technical Overview 2018-06-29

ZIP ZIP 508 KB
Three Ways USB Noise Sources Help You Removing Uncertainty in Y-factor Measurements - White Paper
USB noise sources are a fantastic alternative for noise figure measurements because of their ease, reliability, and versatility.

Application Note 2018-06-26

PDF PDF 1.68 MB
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 mesurement solution. The USB connectivity that comes with a smart feature of automatically download of electronicallly stored calibration data and ENR with temperature sensing capability simplify test setup and improved overall measurement accuracy.

Technical Overview 2018-06-22

PDF PDF 2.56 MB
Keysight Technologies Model 346CK40 – Product Note
The Keysight 346CK40 is a 40 GHz, 2.4 mm connector Noise Source. It has a 10 dB attenuator attached to the output connector to allow for better uncertainty comparing to the 346CK01. The operating frequency is from 1 GHz to 40 GHz, usable to 50 GHz. Data is provided on a floppy disc and a printed copy for the entire frequency band from 1 GHz to 50 GHz at 1 GHz steps.

Technical Overview 2018-05-01

PDF PDF 583 KB
Keysight Technologies 346CK01 – Product Note
The Keysight 346CK01 is a 50 GHz version of the standard model 346C. Its noise output connector is a 2.4 mm (m) instead of the standard APC–3.5 mm (m).

Technical Overview 2018-04-01

PDF PDF 116 KB
N4000A, N4001A, N4002A SNS Series Noise Sources - Technical Overview
The Keysight SNS Series of noise sources work with NFA Series noise figure analyzers and X-Series analyzers to help simplify measurement setup and improve accuracy.

Technical Overview 2018-03-13

Signal Analyzers: Keysight EXA vs. Rohde & Schwarz FSV - Competitive Comparison
This flyer compares noise and noise figure specifications for Keysight's EXA X-Series signal analyzer and Rohde & Schwartz' FSV.

Competitive Comparison 2017-12-11

PDF PDF 550 KB
10 Hints for Making Successful Noise Figure Measurements (AN 57-3) - Application Note
This document will help minimize the uncertainties in your noise figure measurements. Key topics include minimizing extraneous signals, mismatch uncertainties, nonlinearities, and path losses.

Application Note 2017-10-20

Fundamentals of RF and Microwave Noise Figure Measurements - Application Note
This 32-page, black-and-white application note providesinformation on RF and Microwave noise figure measurementts. Topics include noise figure and temperature, noise characteristics of two-port networks, and the measurement of noise figure.

Application Note 2017-09-06

SNS Noise Source Operating Service Guide
Operating service guide explains how to operate and/or service the SNS Series Noise Sources: N4000A, N4001A and N4002A.

User Manual 2017-05-26

PDF PDF 1.19 MB
Noise Source Operating and Service Manual
Operating and service manual for the Noise Sources: 346A, 346B, 346C (including options 001 and 004).

Operation Manual 2017-05-26

PDF PDF 1.72 MB
Product Note for 346C K40
Product note for 346C K40

Technical Overview 2016-02-01

PDF PDF 182 KB
Noise Figure Uncertainty Calculator
The noise figure uncertainty calculator has been created to aid your design work, from components through to systems, helping you meet the continued demand for higher system performance.

Analysis Tool 2015-05-29

N2002A Noise Source Test Set User's Guide
User information for the N2002A noise source test set.

User Manual 2015-03-01

PDF PDF 2.06 MB
Noise Sources Instructions for Attenuator Replacement Installation Note
Instructions for replacing the attenuator in Noise Sources 346C, 346B, N4001C, and N4002A.

Installation Manual 2014-09-01

PDF PDF 77 KB
Noise Sources Installation Note
Installation note for the Noise Sources: 346C and N4002A (all serial numbers).

Installation Manual 2014-08-01

PDF PDF 152 KB
Noise Sources Installation Note
Installation note for the Noise Sources: 346A, 346B, N4000A, N4001A (all serial numbers).

Installation Manual 2014-08-01

PDF PDF 1.17 MB
Making Noise Figure Measurements Video Series
Hints for making noise figure measurements.

Demo 2011-12-05

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