Tektronix EMC120 User Manual

User Manual

EMC120
EMI Precompliance Test Software

070-9878-01

This document applies to software version 1.00
and above.

Copyright © T ektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or
its suppliers and are protected by United States copyright laws and international treaty provisions.

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph
(c)(1)(ii) of the Rights in T echnical Data and Computer Software clause at DFARS 252.227-7013, or
subparagraphs (c)(1) and (2) of the Commercial Computer Software – Restricted Rights clause at FAR

52.227-19, as applicable.
T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this

publication supercedes that in all previously published material. Specifications and price change
privileges reserved.

Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, W ilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.

WARRANTY

Tektronix warrants that the media on which this software product is furnished and the encoding of the programs on
the media will be free from defects in materials and workmanship for a period of three (3) months from the date of
shipment. If a medium or encoding proves defective during the warranty period, Tektronix will provide a replacement
in exchange for the defective medium. Except as to the media on which this software product is furnished, this
software product is provided “as is” without warranty of any kind, either express or implied. Tektronix does not
warrant that the functions contained in this software product will meet Customer’s requirements or that the operation
of the programs will be uninterrupted or error-free.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
the warranty period. If Tektronix is unable to provide a replacement that is free from defects in materials and
workmanship within a reasonable time thereafter, Customer may terminate the license for this software product and
return this software product and any associated materials for credit or refund.

THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS
OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPLACE DEFECTIVE MEDIA OR REFUND CUSTOMER’S PAYMENT IS
THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS
WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER
TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES.

Table of Contents

Getting Started

Operating Basics

Reference

Preface iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About This Manual iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documents iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supported T est Equipment 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Requirements 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First Time Operation 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Help Wizard 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EMI Basics 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EMC Concepts 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Summary of EMI Standards 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Peak Versus Quasi-Peak Detection 3–6. . . . . . . . . . . . . . . . . . . . . .

Correction Factors 3–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Equipment Considerations 3–9. . . . . . . . . . . . . . . . . . . . . . . .

Preparations Before T esting 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . .

Open-Field Site T esting 3–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Anechoic Chamber T esting 3–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conducting EMI T ests 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices

Appendix A: File Naming Conventions A–1. . . . . . . . . . . . . .

Glossary
Index

EMC120 EMI Precompliance Test Software User Manual

i

Table of Contents

ii

EMC120 EMI Precompliance Test Software User Manual

Preface

About This Manual

This manual describes the capabilities of the EMC120 EMI
Precompliance Test Software and how to access its online Help
information. The EMC120 EMI Precompliance Test Software is
also referrred to as the test software.

To get started, refer to the first section, Getting Started. This
section shows you how to install and configure the test software.
For detailed information about features in the software, refer to the
test software online Help. The online Help includes a Wizard mode
that leads you through the steps necessary to set up and run a test.

This manual is composed of the following sections:
H Getting Started provides a product description, installation

instructions, and GPIB configuration information.

H Operating Basics describes the online tutorial available in the

test software.

H Reference provides a discussion of EMI basics that covers all

the elements you should consider when setting up an EMI test.

H Appendices provides additional information.

Related Documents

The following related document is also available:
H The 27120B EMI Measurement System User Manual

(Tektronix part 071-0521-XX) describes a complete EMI test
system offered by Tektronix. This test system uses the EMC120

EMC120 EMI Precompliance Test Software User Manual

iii

Preface

EMI Precompliance Test Software for automated control of
system equipment.

iv

EMC120 EMI Precompliance Test Software User Manual

Getting Started

Getting Started

Product Description

This section presents information you need to install the EMC120
EMI Precompliance Test Software and configure the GPIB card
for control of your spectrum analyzer. This section contains the
following information:

H Product Description
H Supported Test Equipment
H Accessories
H System Requirements
H Installation
H First Time Operation

The EMC120 EMI Precompliance Test Software is a Windows­based program for performing preliminary EMI testing. The test
software works with certain Tektronix spectrum analyzers to
automate precertification EMI testing.

Automated tests simplify the testing required by the FCC and
CISPR standards. You choose tests to perform and configure them
using the standard Windows interface. The online help provides
complete descriptions of all software functions.

The test software is also available as part of the 27120B EMI
Measurement System.

The test software provides the following functions:

H Performs radiated and magnetic emissions tests
H Performs conducted emissions tests

EMC120 EMI Precompliance Test Software User Manual

1–1

Getting Started

H Allows configuration of tests and saving of the test setups
H Lets you define and save correction factors for ancillary

devices

H Graphs test results using several scaling options
H Provides full online help with topic search capability and a

tutorial

Supported Test Equipment

Aside from the host/controller PC described under Installation, the
test software supports the following test equipment:

H Tektronix 2712 Spectrum Analyzer with Option 12, provides

quasi-peak detection and EMC filters (200 Hz, 9 kHz,
120 kHz).

H Tektronix 2711 and 2712 Spectrum Analyzers without

quasi-peak detection. The test software supports firmware
versions 01.12.94, 05.20.94, and newer. Instruments with older
firmware may be compatible though they have not been tested
with the test software.

Accessories

1–2

H Tektronix 2706 RF Preselector.
H Turntable and mast, which are available from Electro-Metrics,

Inc.

The test software includes the following standard accessory:
EMC120 EMI Precompliance Test Software User manual (this
manual).

For information on a complete EMI test system, ask your Tektronix
representative about the 27120B EMI Measurement System. It

EMC120 EMI Precompliance Test Software User Manual

System Requirements

Getting Started

provides all the components you need to perform precompliance
EMI testing of new or redesigned instruments.

The test software runs on a PC computer that meets the following
minimum requirements:

H Intel 486 DX33
H 8 MB RAM
H 10 MB hard drive space
H A 1.44 MB, 3.5 inch floppy drive to load the test software.
H Super VGA monitor
H Windows 3.1 or Windows 95.
H GPIB card of PCII/IIA or AT-GPIB type.

Installation

Installation requires loading the test software to your hard disk and
configuring your GPIB-compatible test equipment and the
software to enable communication.

Installing the Test

Software

EMC120 EMI Precompliance Test Software User Manual

To install and use this program, you should be familiar with
Windows operations and commands. If necessary, review your
Windows User manual before proceeding. For a list of the installed
files, refer to Table 1–1 on page 1–7.

Install the test software on your computer as follows:

1. Insert the test software Disk 1 into your 3.5 inch floppy drive.

2. Start Windows if it is not already running. Quit all other

Windows applications before beginning installation. If the

1–3

Getting Started

installation program accesses a file in use by another applica­tion, an installation error will occur.

3. To start the install program on a Windows 3.1 system, follow

these steps:
a. In the Program Manager, choose FILE at the top of the

screen.

b. Choose RUN from the drop-down menu.
c. In the Run window, enter A:setup. If the install disk is in

another drive, use that drive letter.

d. Select OK.

4. To start the install program on a Windows 95 system, follow

these steps:

a. Choose the Start icon at the lower left.
b. Choose RUN from the pop-up menu.

1–4

c. In the Run window, enter A:setup. If the install disk is in

another drive, use that drive letter.

d. Select OK.

5. The EMC120 Installation window appears while the setup

utility copies several initialization files to your hard disk.

6. Choose INSTALL or EXIT.

H To install the test software, choose INSTALL.
H If you do not want to install the program, choose EXIT.

7. To install the program in the default directory shown at the

lower left, click on the large install icon at the left.

To install the program on a different drive, click on Change
Directory and choose a target drive and directory. When done,

EMC120 EMI Precompliance Test Software User Manual

Getting Started

select OK. Click on the large installation button at the left to
start the installation.

8. The EMC120 begins the installation process. The program

checks for system compatibility before installing the program
files.

As the program installs each file, it displays the percentage
complete for the transfer. Between files, it displays the progress
of the total installation.

9. When prompted, remove the disk and insert the next disk in

order. Choose OK to resume installation.

10.When installation is complete, the program displays the

following message: “EMC120 setup was completed success­fully .”

On a Windows 3.1 system, the install program creates a Windows
group named Tektronix EMC120 and an icon, also named
Tektronix EMC120, within the group.

You have completed the software installation procedure.

GPIB Configuration

EMC120 EMI Precompliance Test Software User Manual

The test software requires the spectrum analyzer, and other
GPIB-controlled test equipment, to have unique GPIB addresses.
To set the GPIB addressing, follow these steps:

1. Configure your 2712 Spectrum Analyzer by selecting the

UTIL/4/0/0 menu and then setting the following parameters:

H Status: Online
H GPIB Address: 1
H Power On SRA: Off
H EIO/LF Mode: EOI
H Talk Only Mode: Off

1–5

Getting Started

2. Set unique addresses on the 2706 RF Preselector and any other

GPIB equipment on the bus. The address is typically set in a
configuration menu or with switches on the rear panel. Refer to
your equipment manual. Set the address on the 2706 RF
Preselector to 10, unless this address conflicts with another
instrument with a preconfigured address of 10.

3. Configure the test software with the addresses you have set for

each piece of equipment. Choose Options from the menu bar
and select Hardware. Figure 1–1 shows the Hardware Setup
window.

1–6

Figure 1–1: Setting GPIB address in the Hardware Setup window

4. Select the type of spectrum analyzer, then set the GPIB address.

This address should match the address set on the spectrum
analyzer.

5. To configure a tower and turntable or a Tektronix 2706

Preselector, click on the appropriate box and enter the
instrument GPIB address.

EMC120 EMI Precompliance Test Software User Manual

Getting Started

6. When done, select OK.

Supported GPIB Cards. The test software supports the National
Instruments GPIB–PCII/IIA and AT-GPIB/TNT IEEE 488 (GPIB)
interface cards. You need install only the Windows instrument
drivers for the interface cards. Other GPIB interface cards may
operate with the test software, but they have not been tested.

Installed Files

The install program places a variety of files in your Windows
system directory and in the application directory . Table 1–1 lists
the files installed in the application directory . For the list of files
installed in the windows\system directory , view the file
SETUP.LST on disk 1 of the test software installation disks.

Table A–1 in Appendix A describes each of the Limit, Factor, and
Test files listed in Table 1–1.

Table 1–1: Listing of files installed in the application
directory

Files installed in C:\EMC120 (default location)

EMC120.EXE
EMC121.HLP
EMC120.INI

DEF AULT.TST
HLPWIZ.LIM
HLPWIZ.RAD
HLPWIZ.TST
EM_6912A.RAD
EM_7820.CON
EM_LPA30.RAD

FCCA_CND.LIM
FCCA_CND.TST
FCCA_RAD.LIM
FCCA_RAD.TST
FCCB_CND.LIM
FCCB_CND.TST
FCCB_RAD.LIM
FCCB_RAD.TST
SAEJ551.LIM
SAE–J551.TST

SAEJ551Q.LIM
55011ARQ.LIM
55022ACA.LIM
55022ACQ.LIM
55022ARQ.LIM
55022BCA.LIM
55022BCQ.LIM
55022BCQ.TST
55022BRQ.LIM
55022BRQ.TST

EMC120 EMI Precompliance Test Software User Manual

1–7

Getting Started

First Time Operation

This section provides information to get you started using the test
software and instructions on using the online help. For information
about using the application, refer to the EMC120 online help.

Starting the Software

Follow these steps to start the test software:

1. If necessary, open the Tektronix EMC120 group window.

2. Double-click on the Tektronix EMC120 icon to start the test

software. Figure 1–2 shows the startup dialog box.

Figure 1–2: Start-up dialog box

1–8

3. Choose either NEW USER or ADVANCED USER.

The NEW USER button starts the test software and automati­cally opens the Help Wizard dialog box for you. For informa­tion on using the Help Wizard, refer to page 2–1.

ADVANCED USER starts the test software directly.

EMC120 EMI Precompliance Test Software User Manual

Getting Started

Online Help

In the EMC120 window, choose Contents from the Help menu.
This selection displays the main online help window . To learn how
to navigate through the online help, choose How to Use Help from
the Help menu.

Illustrations in the online help are optimized for a VGA monitor.
The help buttons function as follows:

H Contents returns to the Help Contents page.
H Search searches for specific topics.
H Back returns to the previously displayed topic.
H History goes to any of several previously displayed help topics.
H Glossary displays the glossary and allows jumps to glossary

topics.

H << and >> move forward and backward through browse topics.
You can print individual help topics to your system printer. Use the

File Print command to print the current topic. The print command
uses the default system printer.

EMC120 EMI Precompliance Test Software User Manual

1–9

Getting Started

1–10

EMC120 EMI Precompliance Test Software User Manual

Operating Basics