Keysight x series User manual

Keysight X-Series Signal Analyzers
This manual provides documentation for the following analyzers:
PXA Signal Analyzer N9030A CXA Signal Analyzer N9000A
MXA Signal Analyzer N9020A MXE EMI Receiver N9038A
EXA Signal Analyzer N9010A
Notice: This document contains references to Agilent.
Please note that Agilent’s Test and Measurement business
has become Keysight Technologies. For more information,
go to www.keysight.com.
EMI
Measurement
Application
Measurement
Guide

Notices
© Keysight Technologies, Inc.
2008-2014
No part of this manual may be
reproduced in any form or by any
means (including electronic storage
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
Print Date
August 2014
Supersedes: March 2014
Printed in USA
Keysight Technologies Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Warranty
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described in this document are
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Restricted Rights Legend
If software is for use in the
performance of a U.S. Government
prime contract or subcontract,
Software is delivered and licensed as
“Commercial computer software” as
defined in DFAR 252.227-7014 (June
1995), or as a “commercial item” as
defined in FAR 2.101(a) or as
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defined in FAR 52.227-19 (June 1987)
or any equivalent agency regulation or
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greater than Restricted Rights as
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(June 1987). U.S. Government users
will receive no greater than Limited
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in any technical data.
Safety Notices
CAUTION
A CAUTION notice denotes a hazard. It
calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
could result in damage to the product
or loss of important data. Do not
proceed beyond a CAUTION notice
until the indicated conditions are fully
understood and met.
WARNING
A WARNING notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
could result in personal injury or
death. Do not proceed beyond a
WARNING notice until the indicated
conditions are fully understood and
met.

3
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
http://www.keysight.com/find/exa
http://www.keysight.com/find/cxa
http://www.keysight.com/find/mxe
To receive the latest updates by email, subscribe to Keysight Email Updates at the following URL:
http://www.keysight.com/find/emailupdates
Information on preventing analyzer damage can be found at:
http://www.keysight.com/find/tips
Is your product software up-to-date?
Periodically, Keysight releases software updates to fix known defects and incorporate product enhancements. To search for
software updates for your product, go to the Keysight Technical Support website at:
http://www.keysight.com/find/techsupport

4

Contents
5
Table of Contents
1 About the EMI Receiver Measurement Application
The Role of Precompliance in the Product Development Cycle 8
Compliance Measurements 8
2 Conducted Emissions Measurement Examples
Making Conducted Emission Measurements 10
3 Radiated Emissions Measurement Examples
Making Radiated Emission Measurements 20
4 Disturbance Analyzer (Click) Measurements
Overview 28
Making a Measurement 29
Quick Reference to Menus 36
Setup Table Menu Features 38
5 Saving Data
Overview 42
Correction Data File 44
Trace Data Files 45
Limit Data Files 47
Signal List Data Files 49
Scan Table Data File 50
Meas Results Data Files 50
Line Impedance Stabilization Networks (LISN) 53
LISN Operation 54
Types of LISNs 55
Antenna Factors 57

6
Contents
Field Strength Units 58
Basic Electrical Relationships 61
Detectors Used in EMI Measurements 63
Peak Detector 64
Quasi-peak Detector 65
Average Detector 66
Glossary of Acronyms and Definitions 67

7
About the EMI Receiver Measurement Application
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 EMC 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.

8
About the EMI Receiver Measurement Application
The Role of Precompliance in the Product Development Cycle
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.

9
Conducted Emissions Measurement Examples
2 Conducted Emissions
Measurement Examples
Conducted emissions testing focuses on emissions that are conducted along a power
line that are generated by the device under test (DUT). The transducer that is
typically used to couple the emissions of the power line to the EMI Receiver is a line
impedance stabilization network (LISN).
The regulatory limits specify the maximum DUT emission energy, usually in dBμV,
detected by the LISN. The test range for these measurements is typically 150 kHz to
30 MHz, though some limits may start as low as 9 kHz, depending on the regulation.

10
Conducted Emissions Measurement Examples
Making Conducted Emission Measurements
Making Conducted Emission Measurements
CAUTION Before connecting a signal to the MXE receiver, make sure the instrument can safely
accept the signal level provided. The signal level limits are marked next to the RF
Input connectors on the front panel.
See the AMPTD Y Scale menu for details on setting internal attenuation to prevent
overloading the receiver.
Setting up and making an ambient measurement
This section demonstrates how to set up and perform conducted emission tests in the
150 kHz to 30 MHz range.
NOTE Determine which regulatory requirements you will be testing to prior to starting the
following procedure.
Step Action Notes
1Turn on the instrument. a. Press the front-panel power
key.
2Select the EMI mode a. Press Mode, EMI Receiver. This is the default mode.
3Ensure that the input is DC
coupled a. Press Input/Output, RF Input, RF Coupling to DC.This step is not necessary if Option 544 is installed.
4Open the scan table and
select the desired range a. Press Meas Setup, Scan Table, Range 2, Range to
On.
b. Press RF Input, Input2.
Deselect any other range that has a
green check.