Automatic EMI Measurement Software
■ Overview
The EP5 series of automatic EMI measurement software is a line
of software products developed to measure and analyze radiated
emission and conductive emission generated from electronic
equipment. The EP5 series performs a complete set of EMI measurement, from sinplified measurement for redeucing EMI from
electronic equipment to standards-compliant, final qualification
testing. The ER5 series provides automatic control of the spectrum analyzer, EMI test receiver, turntable, antenna mast, line
impedance stabilization network (LISN), and clamp moving system required for EMI measurement. Even the relatively inexperienced user is able to efficiently run a complete series of measurements, output measurement results to a printer, and save test results to a HDD, FDD, or other recording medium.
■ Standard EMI Measurement Software
Products
EP5/RE
EP9/CE
● EP5/RFP
● EP5/AT
● EP5/RET
● EP5/NSA
● EP5/ME
● EP5/RSE
●
●
■ Supported Instruments
●
CISPR, EN, ETS, FCC, VCCI and other national emissions standards, as well as CISPR, ANSI, and VCCI site attenuation standards
■ Basic Measurement Functions
●
●
●
Spectrum data acquisition
Maximum radiation position measurement (azimuth/height
pattern, clamp position)
Quasi-peak (QP)/Average (AV) measurement according to
CISPR Pub.16
Measurement result display/output/edit/save
●
●
●
●
●
●
●
●
●
●
●
4
Sophisticated user interface
Flexibility in window layout setting
Measurement procedure reduces measurement time
Instrument and system self-diagnostic functions
Spectrum overwrite function efficient for corrective action
Measurement result data editable by MS-Word and Excel
Capable of saving standard limits, factors, measurement
system gain/loss, and measurement conditions to files, enabling them to be set, edited, and created easily.
Capable of changing limits freely after measurement
Template feature allowing icons to be assigned to individual tests
Support for many types of hardware products of various
manufactures
Assorted password function for distinguishing between
measurement operator and administrator
EMI test receivers
Keysight Technologies: N9038A, E7400, E4440A
Rohde & Shwarz
: ESR, ESU,ESCI, ESIB series, ESPI
series, ESCS30, ESVS/ESHS series,
ESPC, etc.
PMM
: 9010, 9010F
TESEQ
: SCR3101, SCR3102
Others
: Schwarzbeck, LIG Nexl, etc.
■ Features
●
Spectrum analyzers
Keysight Technologies: N9030A, N9020A, N9010A, N9000A series,
(Agilent) PSA/E4440 series, E4400/7400 series, etc.
Rohde & Schwarz : ESR, ESU, ESCI, ESIB series, ESPI series, FSL series, FSP series, etc.
ADVANTEST
: U37xx series, R3131, R3132, R3260/
R3270 series, etc.
Others
: Anritsu, Tektronix
■ Supported Standards
●
: Radiated emission measurement software
: Conducted emission measurement software
: RF power emission measurement software
: Antenna terminal emission measurement software
: Tuner radiated emission measurement software
: Site attenuation measurement software
: Multi-purpose emission measurement software
: Radiated Spurious emission measurement software
●
RF selector switches
TOYO
●
: NS4000 series, NS4900 series
Turntables and antenna masts
ETS/EMCO, INNCO, TDK , Tokin, Device, etc.
(Consult TOYO for other makers/models.)
■ Operating Environment
OS
: Windows 7, VISTA
CPU
: Pentium, 2 GHz min.
Memory
: 2 GB min.
Monitor
: 24-inch
Printer
: Windows compatible color printer
GPIB board: National Instruments product
EP7: EMI Evaluation and Measurement Software
■ Overview
As digitalization and mobilization progresses along with higher
density packaging of electronic devices, it has become more difficult to identify noise sources and provide EMI measures. There
is also a tendency for the time and cost required for providing
such measures to increase.
The directivity of noise is becoming sharper due to the expansion
of the upper limit measurement frequencies associated with faster CPU operation and addition of wireless functions. Many products adopt spread spectrum transmission and power saving technologies, which also contributes to increase of noise that fluctuates in terms of frequency and operation time.
huge volume of measured data to be displayed visually from various angles.
■ Evaluation and Measurement Functions
●
●
●
●
●
●
●
High-speed spectrum data acquisition and save
Spectrum data real-time display
Time domain analysis (time variation display)
3D graphics display (time domain, irradiation pattern)
Various maximum irradiation position search mode
Variance evaluation
Calculation and display of uncertainties
Since the behavior of noises is becoming more complex also
when evaluation and measurements are performed, there is increasing risk that the noise itself would be undetected or the
maximum level cannot be obtained. This situation has lead to the
increase of the measurement time.
■ EP7 Series of EMI Evaluation and
Measurement Software Products
The EP7 EMI Evaluation and Measurement Software has been
newly developed based on the basic functions of EP5 Measurement Software. This EP7 EMI Evaluation and Measurement Software collects and saves the complex noises generated in digital
equipment. It can detect noise that goes undetected or unidentified by conventional software. It also reduces the automatic measurement time and improves reliability.
■ Operating Environment
Furthermore, this software has upgraded the post-measurement
product evaluation and analysis function. This function enables a
10
●
●
EP7/RE: Radiated emission evaluation and measurement software
EP7/CE: Terminal noise evaluation and measurement software
OS
: Windows 7, VISTA
CPU
: Pentium, 2 GHz min.
Memory
: 2 GB min.
Monitor
: 24-inch
Printer
: Windows compatible color printer
GPIB board: National Instruments product
EP7: EMI Evaluation and Measurement Software
■ Setting Mode According to Purpose(Launcher)
This software allows you to execute the functions in accordance
with your purpose, including measurement, corrective action, and
analysis. The functions of this software are divided into modes,
and therefore you can display only the function window that you
require from various available functions. This feature simplifies
the screen and improves operability. The function window of
each mode can be set arbitrarily and this setting can be saved for
each operator.
3D (Frequency/Level/Time) Graph
In the 3D (frequency/level/time) graph shown above, you can
analyze data using a time axis function not provided by conventional software. This 3D graph has the following features.
Setting Mode (Launcher)
Auto measurement mode : Standard compatibility measurement. Check of mass-production product.
Corrective action measurement mode : Repetitive spectrum
acquisition in a specific range. Check of
specific noise source. Check and measurement of part/board/prototype.
Data analysis mode : Investigation of obtained data characteristics. Comparison of multiple data. Overall
tendency check based on multiple data.
■ Operator Identification and Management
This software identifies an operator at login time so that the authorization for performing settings for equipment connected to the
measurement system and factor file settings can be restricted. The
software window can be customized and saved for each operator.
- Graph rotation function (any rotation direction and speed)
- Allows changing to any desired scale for three axes.
(Such as frequency span, time, and level expansion/reduction)
- Various display color settings
This function allows you to determine at a glance the level transitions and behavior (whether a transition is rapid, moderate, or
intermittent) of noise with the passage of time. Therefore, it is
very effective in identifying a noise source. Noise caused by static
electricity can be also identified before performing QP detection
measurement.
■ Radiation Pattern Analysis (2D/3D Graph)
This software obtains and saves the turntable angle and antenna
mast height data at the same time as the spectrum data. Therefore, after measurement, it allows you to evaluate and analyze
the noise radiation pattern emitted from a product using the 2D
(angle/height, the level difference is displayed in color) and 3D
(angle/height/level) graph display and numerical data.
■ Variance Evaluation Function
To evaluate and determine the variance caused by product/part
subjected to corrective action or measurement environment, this
software calculates the standard deviation after obtaining several
data and displays the result in a graph you can use to check the
reliability easily.
■ Time Domain Analysis (2D/3D Graph)
As much as possible of all spectrum data collected at high speed
is saved. After measurement, these data can be evaluated and analyzed using 2D (time/level), 3D (frequency/level/time) graph
display and numerical data.
3D (Angle/Height/Level) Graph
11
EP5/RE: Radiated Emission Measurement Software
Screenshot with EP5/RE Radiated Emission Measurement Software
■ Basic Measurement Functions
●
Range measurement (spectrum data acquisition)
The software executes the pre-test for pthe final qualification test
and the measurement of the equipment under test (EUT). The
software executes the pre-test of the final quality test and the
measurement of the equipment under test (EUT). The software
obtains the maximum value for spectrum data while manipulating the antenna mast and controlling turntable rotation. At this
time, the software also obtains the antenna height and table angle at the maximum position at each frequency, thereby allowing
prompt and effective corrective action to be taken.
●
Suspect frequency listing creation (QP-measured
frequency selection)
The software allows you to obtain the peak values from spectrum
data for interference signals automatically or manually. In auto
mode, the software lists the number of interference signals
specified whose values are in ascending order due to the difference
between the specified limit and the collected peak value.
●
Final measurement (QP-measurement at maximum
position)
The software measures the value of the antenna height and azimuth patterns at each of the identified interference frequencies to
determine the position at which the radiated interference level is at
its maximum value. The QP is measured at this position.
In order to reduce measurement times, you can use positional data
(indicating the position at which the radiated interference level is
at its maximum value) which was obtained from the spectrum data.
●
Measurement result display
Measured data is displayed on the monitor in real time to allow
comparison of data.
The position and size of each data window are freely changeable,
so that the user can display only the data a particular measurement requires. For example, only the spectrum display window is
displayed as taking measures against incorrective action.
Graph scale, color, and line type are also freely changeable.
●
Measurement result output and save
Any data displayed on the screen can be output to a printer or
saved to a storage medium such as a hard or floppy disk. The report wizard makes printing in any desired format easy. The data
format can be previewed on-screen before it is output to the printer.
■ Report generation
EP5/RE has a「Report print」function which prints out measurement data in the preset templates, and an「Excel/Word export」
function which exports measurement data to Word and Excel
(Word and Excel need to be prepared by the user). With the
「Word/Excel export」function, you can output measurement
data to a location specified in advance and print out the data in
your own report formats.
5
EP5/RE: Radiated Emission Measurement Software
■ Easy to Start Automatic Measurement
To start a measurement, select the corresponding measurement
command from the [Measurement] menu or click on the corresponding measurement button on the Measure Bar.
Series Measurement : Sequentially executes the series of measurements, including printing, specified
in the Series Measurement Condition dialog box.
SPA Range Measurement: Executes spectrum range measurement
using a spectrum analyzer.
Creating Suspected List: Creates a suspected list automatically
from the results of spectrum range measurement.
Final Evaluation
: Measures QP levels from the suspected list
using EMI test receiver (or QP adapter).
Print Report
: Prints the results of measurements.
■ Loading and Saving Templates and
Measurement Conditions
You can save to a template file a set of basic settings (environment
and option settings) required for measurements, and the pathname for the measurement condition file that defines the hardware-specific settings and measurement procedures. Automatic
measurement is initiated by loading the template settings.
■ Efficient for Manual Measurement and
Corrective Action
●
Simple spectrum measurement
The software also provides a new user interface that dragging
the mouse over a span of frequencies on the graph zooms into a
range for which you can select [Send Frequency Span] from the
rightclick menu to transfer the enlarged frequency span to the
spectrum analyzer.
The spectrum analyzer can be set up manually to load the waveform on the analyzer into the application.
●
Spectrum overwrite function
When the EUT is improved to reduce noise level, in general, a set
of a correction actions and measurements is repeated over and
over. Data obtained by repeated measurement is over written in
the graph window an unlimited number of times. The colors and
line types of the spectrum data are freely changeable. You can
also display past measured data together with current data on the
screen for reference purposes.
●
Manual instrument operation using the Tool Bar and
the Control Panels
The Instrument Tool Bar allows you to operate instruments manually. To set the spectrum analyzer trace mode, receiver detection mode, or rotate the turntable, etc.
Use the Control Panel for more detailed control over the instrument. This panel can be left running on the screen at all times.
■ Assigning Icons to Template Files
You can associate template files with the EP5/RE executable file
so that double-clicking on a template file starts the software with
settings loaded from a template file.
Spectrum Analyzer and Receiver control panels
6
EP5/RE: Radiated Emission Measurement Software
■ Instrument Diagnostic Functions
The instrument diagnostic functions allow you to check the states
of the system. It allows you not only to check the status of each
connected instrument, but also to check the measurement subsystem and to obtain new factors.
Instrument diagnosis is performed with the aid of the Diagnostic
Wizard, with the results recorded in a log file.
■ Report Types
■ Setting a Password
You can set a password to prevent other users from modifying
prepared files and accessing specific functions.
●
Restricted functions
Saving templates and conditions.
Changing instrument settings and instrument diagnosis settings.
Creating or editing limit files, antenna factors, and correction factors.
●
Spectrum graphs
Suspect Data List : List Only/Graph & List (By Polarization/
Both polarization)
Max Position Graph: Height pattern/Azimuth pattern Height &
Azimuth patterns
Level Data List
: List Only/Graph & List (By Polarization/
Both polarization/Max level position)
■ Editing Files
You can freely edit limit, antenna factor, and measurement subsystem correction factor files.
●
Limit file
Set frequencies and their limits in ascending order of frequency.
Up 100 data items can be set.
■ Instrument Setup
The software supports a variety of test equipment, allowing you
to easily change the model of the instrument to be used. This can
be done only by selecting the appropriate driver file in the Instrument Setting dialog box.
●
Antenna factor file
When editing antenna factors, enter the horizontal and vertical
factors for each frequency. This requires at least three piece of
frequency data points. Spline interpolation is used to estimate
precisely the change in antenna factor between the frequency
sets. The data specified can be distinguished in the forms of
graph. The dialog box settings can be checked on a graph. This
helps prevent input errors.
■ Report Printing
Follow the instructions of the Report Wizard to print reports efficiently in a format of your choice.
Clicking on the <Preview> button displays the preview image of
the report to be printed.
Antenna factor file
7
EP9/CE：Conducted Emission Measurement Software
The Software is application software that measures conductive
noise from electric or electronic equipment using a line
impedance stabilization network (LISN) and compares it
with a variety of standard values to test the electromagnetic
compatibility (EMC) of the equipment under test.
■ Supported Standards
●
●
●
CISPR11,14, 22, 32
FCC Part 15 Subpart B
VCCI
SPA and Receiver setting dialog box
■ Basic Measurement Functions
Range measurement (spectrum data acquisition)
The software executes a pre-test of the equipment under test
(EUT) for a final qualification test so that corrective action can
be taken. The software obtains the maximum value of spectrum
data according to measurement conditions. At this time, the LISN
(AMN) measure phase can be switched automatically.
●
Suspect frequencies listing creation (QP/AV-measured
frequency selection)
The software allows you to collect the peak values automatically
or manually from spectrum data. In auto mode, the software
collects and lists the numbers of interference signals specified as
setting requirement in ascending order from limit value.
●
■ Features
FFT sweep
If EMI test receiver has FFT (Time Domain) function, the
software executes a final-test to use FFT function and collects
the Peak values, QP values and AV values simultaneously from
150 kHz to 30MHz. You do not have to execute a pre-test scan
and save a measurement time. FFT mode is much faster than
traditional measurement method.
●
Final measurement (QP/AV measurement)
The software performs QP/AV measurement for each detected
frequency.
●
■ Setting Measurement Ranges
Set the frequency range to be measured and make settings for
the spectrum analyzer for each measurement range. Up to 100
measurement ranges can be set.
Spectrum Graph using FFT function
8