Keysight Technologies X Series Manuel utilisateur

N6141A & W6141A

EMI Receiver

Measurement

Application

Measurement Guide

Keysight X-Series Signal Analyzers

This manual provides documentation for the following models: PXA Signal

Analyzer N9030A

MXA Signal Analyzer N9020A

EXA Signal Analyzer N9010A

CXA Signal Analyzer N9000A

MXE EMI Receiver N9038A

Notices

2008-2015

No part of this manual may be

reproduced in any form or by any

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and retrieval or translation into a

foreign language) without prior

agreement and written consent from

Keysight Technologies, Inc. as

governed by United States and

international copyright laws.

Manual Part Number

N6141-90002

Edition

Edition 1, June 2015

Supersedes: August 2014

Published by:

Keysight Technologies

1400 Fountaingrove Parkway

Santa Rosa, CA 95403

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Where to Find the Latest Information

Documentation is updated periodically. For the latest information about these products, including instrument software

upgrades, application information, and product information, browse to one of the following URLs, according to the name

of your product:

http://www.keysight.com/find/pxa

http://www.keysight.com/find/mxa

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http://www.keysight.com/find/mxe

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Is your product software up-to-date?

Periodically, Keysight releases software updates to fix known defects and incorporate product enhancements. To search

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Contents

Keysight N6141A Measurement Guide 5

Table of Contents

1. About the EMI Receiver Measurement Application

The Role of Precompliance in the Product Development Cycle . . . . . . . . . . . . . . . . . . . . . . . . 9

Compliance Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Conducted Emissions Measurement Examples

Making Conducted Emission Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3. Radiated Emissions Measurement Examples

Making Radiated Emission Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4. Disturbance Analyzer (Click) Measurements

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Making a Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Quick Reference to Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Setup Table Menu Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5. APD (Amplitude Probability Distribution) Measurements

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Making a Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6. Saving Data

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Correction Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Trace Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Limit Data Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Signal List Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Scan Table Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Meas Results Data Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

A:.Line Impedance Stabilization Networks (LISN)

LISN Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Types of LISNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

B:.Antenna Factors

Field Strength Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

C:.Basic Electrical Relationships

6 Keysight N6141A Measurement Guide

Contents

D:.Detectors Used in EMI Measurements

Peak Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Quasi-peak Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Average Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

RMS Average Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Glossary of Acronyms and Definitions

Keysight X-Series Signal Analyzer

EMI Receiver Measurement Application/N6141A

Measurement Guide

1 About the EMI Receiver Measurement Application

This book provides information on using the EMI Receiver Mode in your MXE

EMI Receiver or your X-Series Signal Analyzer.

The MXE EMI Receiver allows you to make fully CISPR compliant

measurements. The X-Series signal analyzers allow you to make the same

measurements in a precompliance environment.

The N6141A and W6141A EMI measurement applications enable you to

perform conducted and radiated emissions tests to both commercial and

MIL-STD requirements. It provides better sensitivity, accuracy and reduces test

margins, across the MXE EMI Receiver or X-Series signal analyzers, so you can

make more precise measurements. The wide range of features enables you to

use the scan table to set up frequency ranges, gains, bandwidths and dwell

time. You can scan a frequency range and display the results in log or linear

format, search for signals, measure the peak, quasi-peak and average values of

the signals and place the results in a table. Use the Signal List feature to mark

and delete unwanted signals, leaving only those of interest.

This measurement application enables you to:

— Identify out-of-limit device emissions

— See device emissions typically hidden in the noise floor

— Differentiate between ambient signals and device emissions

— View signals over time to identify intermittent responses

— Maximize signals and compare against regulatory requirements

— Built-in commercial and MIL-STD compliant bandwidths, detectors

and band presets

— Continuously monitor signals with bar meters to detect maximum

amplitude

— Compare measured emissions to regulatory limits

You can access this application by way of the front panel or a remote interface.

The EMI measurement application provides the following measurements:

— Frequency Scan (Signal List) Measurement

—StripChartMeasurement

8 Keysight N6141A Measurement Guide

About the EMI Receiver Measurement Application

— Monitor Spectrum (IF Mode) Measurement

— APD (Amplitude Probability Distribution) Measurement

— Disturbance Analyzer (Click) Measurement

Keysight N6141A Measurement Guide 9

About the EMI Receiver Measurement Application

The Role of Precompliance in the Product Development Cycle

To ensure successful electromagnetic interference (EMI) compliance testing,

precompliance testing has been added to the development cycle. In

precompliance testing, the electromagnetic compatibility (EMC) performance

is evaluated from design through production units.

It is important to have a strategy that will help you test for potential EMI

problems throughout the product development cycle. It is also important to

have equipment and processes in place that will allow you to observe how

close you are to compliance at any given time in the development cycle. This

reduces the time and cost associated with final compliance testing.

Compliance Measurements

Electrical or electronic equipment that uses the public power grid or has the

potential for electromagnetic emissions must pass EMC (electromagnetic

compatibility) requirements. These requirements fall into four broad types of

testing:

—Conducted emissions testing focuses on signals present on the AC mains

that are generated by the device under test (DUT). The frequency range of

these measurements is typically 9 kHz to 30 MHz. However, MIL-STD

measurement may have a wider frequency range.

—Radiated emissions testing searches for signals being emitted from the

DUT through space. The typical frequency range for these measurements is

30 MHz to 1 GHz or 6 GHz, although FCC regulations require testing up to

40 GHz.

—Radiated immunity is the ability of a device or product to withstand

radiated electromagnetic fields.

—Conducted immunity is the ability of a device or product to withstand

electrical disturbances on power or data lines.

10 Keysight N6141A Measurement Guide

About the EMI Receiver Measurement Application

Compliance Measurements

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