Electromagnetic Compatibility Record · 2016-12-06 · L.F. Research Technical Report:...

L.F. Research Technical Report - File Reference: 2009-077.docx

LF Research EMC Facility12790 Route 76

Poplar Grove,

Illinois 61065, USA

Phone: 815-566-5655Fax: 815-547-3467e-mail: [email protected]: www.lfresearch.com

Title:

Electromagnetic Compatibility Record

documenting the evaluation of the

RS112 Rack Mounted Server

on behalf of:

Crystal Group Inc.

Oct 2009

L.F. Research Technical Report: 2009-077.docx Page 2 of 42Section B: Table of Contents

INTRODUCTION.................................................................................................................... 4

SUMMARY OF RESULTS..................................................................................................... 4

EUT SPECIFIC INFORMATION ......................................................................................... 5

TEST REQUESTER .................................................................................................................... 5

EUT DESCRIPTION .................................................................................................................. 5

EUT IDENTIFICATION ............................................................................................................. 5

EUT HANDLING...................................................................................................................... 6

EUT OPERATING MODES ........................................................................................................ 6

MODE 1 - FOR ALL TESTING .................................................................................................... 6

EUT BONDING ........................................................................................................................ 6

EUT SUPPORT EQUIPMENT ..................................................................................................... 6

TEST HARNESSES .................................................................................................................... 6

ELECTRICAL POWER REQUIREMENTS...................................................................................... 7

PASS/FAIL CRITERIA ............................................................................................................... 7

EMISSIONS .............................................................................................................................. 7

MODIFICATIONS MADE DURING TESTING ................................................................................ 7

LIMITATIONS ON USE .............................................................................................................. 7

GENERAL INFORMATION ................................................................................................. 7

TEST CHAMBER....................................................................................................................... 7

GROUND REFERENCE PLANE................................................................................................... 8

LINE IMPEDANCE STABILIZATION NETWORKS ........................................................................ 8

BONDING ................................................................................................................................ 8

TEST SOFTWARE ..................................................................................................................... 8

TEST EQUIPMENT .................................................................................................................... 9

ENVIRONMENTAL CONDITIONS ............................................................................................... 9

REFERENCE DOCUMENTS ........................................................................................................ 9

ABBREVIATIONS.................................................................................................................... 10

TEST METHODOLOGY – MIL STD 461F CE102 CONDUCTED EMISSIONS......... 13

TEST UNCERTAINTY.............................................................................................................. 13

PERFORMANCE CRITERIA ...................................................................................................... 13

TEST RESULTS ...................................................................................................................... 14

TEST EQUIPMENT .................................................................................................................. 14

L.F. Research Technical Report: 2009-077.docx Page 3 of 42Section B: Table of Contents

TEST METHODOLOGY – MIL STD 461E RE102 RADIATED EMISSIONS 2 MHZTO 18 GHZ ............................................................................................................................. 19

TEST RESULTS ...................................................................................................................... 20

TEST EQUIPMENT FOR RE 102 .............................................................................................. 21

MEASUREMENT UNCERTAINTY ............................................................................................. 21

TEST FACILITY – L F RESEARCH.................................................................................. 36

LOCATION ............................................................................................................................. 36

DESCRIPTION ........................................................................................................................ 36

PERSONNEL ........................................................................................................................... 37

DOCUMENT REVISION HISTORY.................................................................................. 41

REQUEST FOR CLIENT FEEDBACK.............................................................................. 42

L.F. Research Technical Report: 2009-077.docx Page 4 of 42Section C: General Information

Introduction

The information supplied in this report provides the supporting data needed for the RS112Rugged Rack Mounted Server ( here-in known as the Equipment Under Test - EUT ) tosatisfy the Electromagnetic Compatibility ( EMC ) emissions requirements for Mil Std 461F.

The request for test was submitted by the manufacturer, a test procedure was not prepared forthis testing. LFR followed internal test procedures derived from Mil Std 461F, the testsperformed are fully documented in this report:

Specifically, the conducted and radiated emissions from the EUT were measured using thefollowing emissions standard:

MIL-STD 461F “Requirements for the control of electromagnetic interferencecharacteristics of subsystems and equipment“

The EUT was evaluated prior to starting the formal test at various power levels and operatingconfigurations to determine if there was a worst case. As a result of this investigation a singlemode of operation was defined.

All tests were performed by L F Research at the L F Research EMC laboratory, details ofwhich are provided in Section F.

Summary of Results

Requirement Standard Requirement Result

Conducted Emissions MIL STD 461F CE102 Pass

Radiated Emissions MIL STD 461F RE102 Pass

The above summary shows the EUT demonstrated compliance with requirements.

This report utilizes the standard L F Research template having sections A through H. Tominimize document manipulation, there are eight sections in this report. The contents of eachSection are as follows:

Section Description

A Document Cover Page

B Table of Contents

C This section describes the general test information including, EUTdescription, test conditions, modes of operation, etc

D This section contains all the details for the CE test

E This section contains all the details for the RE test


Section Description

F This section contains information about the test facility and its technicalexpertise

G Document Revision History

H Request for client feedback on their experience with L F Research

EUT Specific Information

Test RequesterThe testing described in this report was requested by the manufacturer, the key informationbeing as follows:

Name: Crystal Group Inc.. ( CGI )

Primary Contact: Richard Ridenour

Address: 850 Kacena Road

Hiawatha, IA 52233

Phone: +1-877-279-7863

E-mail; [email protected]

FAX: +1-319-393-2338

EUT DescriptionThe RS112 is a single height ( 1U ) ruggedized rack mounted server designed to meet andexceed MIL-STDs 167-1, 461E/F, 810F, and MIL-S-901-D.

Internally the RS112 has a PCIe slot, a PCI-X Slot, up to two SATA or SAS drives and a 400Watt 100 to 240 V ac power supply. The CPU is a 2.53 MHz dual quad-core, hyper-threadingIntel Nehalem Xeon Processor.

Height: 1.72” (4.366cm) , Width: 19” (44.45cm), Depth: 20.125” (32.4cm) Weight: 16 to21lbs (7.76 to 9.52Kg)

The EUT is intended to be 19” rack mounted with all connections at the rear of the enclosure.

EUT IdentificationThe following table defines the EUT that was tested and documented in this report.

Device P/N Serial Number

RS112 Prototype

Figure C:1 shows photographs of the EUT tested.


EUT HandlingThe EUT was transported to and from L F Research by Richard Ridenour of Crystal GroupInc. Functional checkout on arrival at LFR was performed by Richard Ridenour.

EUT Operating ModesThe EUT was tested in a single mode; this mode was determined to be the worst case, ortypical working condition:

Mode 1 - for all Testing

The EUT was operated running Microsoft windows XP in a typical desktop environment. Awindow displaying scrolling H pattern continuously operated during the testing. A singleanalog display interface cable was hooked to the PC, and extended so that the monitor couldbe removed from the test area during radiated emissions. In addition, a USB keyboard andPS2 mouse were also connected.

The rationale behind emissions testing with these devices is that they represent the typicalapplication for this EUT.

Figure C:2 shows a photograph of the monitor screen driven by the EUT.

EUT BondingThe EUT was situated on the ground plane; the bottom of the EUT is a faying surface. Toensure good contact between this surface and the ground plane, the EUT faying surface wascleaned with a solvent and positioned on a flat clear spot on the ground plane.

The bond impedance was verified under 2.5 milliohms.

EUT Support EquipmentThe following table defines the equipment that was hooked to the PC for it to operate, but areNOT considered under test. This equipment is not supplied by the manufacturer of the EUT.

Description Manufacturer Device P/N Serial Number

Monitor: Viewsonic VLCD823722-3W 91B0246E00034

Keyboard: Dynex DX-WKBD 7I20A007032

Mouse: Dell XN966 H5I734111GZ9

Test HarnessesAll support equipment was positioned to the left of the test area, and all cabling routed inaccordance with Mil Std 461F.

The test cables for this EUT consist of the unshielded power cable, the analog video cable,and the keyboard and mouse cable. The installation for this device would typically haveshorter cables in a more compact arrangement.


Since connections are made to the rear of the EUT, but the front face had vent holes, the EUTwas situated with the bonding surface with the maximum cable length exposed to the antenna.The power cables were extended the required 2 metres. The monitor, keyboard and mousecables were located starting 10 cm back from the front edge of the ground plane. A minimum2 m of cable or the actual cable length faced the antenna.

An engineering evaluation determined the cables to be the principal source radiation andhence maximum exposure of the cables to the test antenna was made.

The layout of the entire test setup can be seen in the radiated emissions photographs.

Electrical Power RequirementsPower for the EUT was derived from 120 volts 60 Hz facility power. The power was passedinto the test chamber through 120 dB isolation filters.

Pass/Fail Criteria

Emissions

The Manufacturer supplied the following pass/fail criteria for emissions:

For Mode 1, Compliance with the limits of Figure CE 102-1 in Mil Std 461F for CE102,compliance with the limits of Figure RE 102-4 in Mil Std 461F for RE102.

The limit lines are plotted on all data sheets.

Modifications made during TestingAs supplied, the Test system met the emissions limits. NO modifications to the EUT wererequired to exhibit the emissions documented in this report.

Limitations on UseBased on the testing documented in this report, there are no limitations on use when installedin accordance with the manufacturers guidelines in the correct equipment category.

General InformationThis section contains general information about the test facility. Specific informationapplicable to each test requirement is contained in the appropriate section.

Test ChamberAll testing was performed inside a 4m, by 7m, by 3m shielded enclosure. The shielded roomconstruction was that of two galvanized steel sheets each side of a composite panel. UniversalShielding Inc. manufactured the room.

Without wire penetrations, no radiated ambient signals are visible. Regular maintenance isperformed on the door, to ensure optimum performance. To minimize reflections inside the


enclosure, the whole roof, the area around the EUT and Receive antenna and portions of thesidewalls are lined with Fair-rite tiles. The absorption loss exceeds that of TABLE 1 in MIL-STD 462E across the entire radiated emissions test range. Additional foam pyramidalabsorber functional to 40 GHz is available for selective placement if required

All power wires enter the enclosure via filters with greater than 100 dB of attenuation at 10kHz. Separate filters are used for Lighting, 60 Hz power, 400 Hz power, dc andcontrol/monitoring lines. This noise is substantially below the measurement limits, easilymeeting a 6dB margin requirement.

Ground Reference PlaneThe EUT was installed on a 1.25 m by 3.2 m ground plane made from 1 mm thick Aluminumsheet. The Ground plane was bonded to the enclosure walls with very short wide strips, withspacing less than 1m. A 4-wire bond test verified from any point on the ground plane to theenclosure, the resistance was less than 2.5 milli-Ohms.

Line Impedance Stabilization NetworksThe LISN’s used at L F Research conform to the requirements of Figure 6 of Mil Std 461F.The coupling loss for each line, even though small, is accounted for by the software duringconducted emissions measurements.

When unused, all LISN RF ports were terminated in 50 Ohm loads either internally or viaexternal RF terminations.

BondingBonds beside those of the EUT where RF currents may be expected or were required weremade with either Copper or Brass sheet. Width to length ratios were typically less than 1:3and never greater than 1:5. Prior to bonding, surfaces were cleaned with Bronze wool,acetone, and then fastened together. All bonds were verified as under 2.5 milli-Ohms with a 4wire Kelvin type meter.

Test SoftwareAll Radiated Emissions (RE) (Pre-scan ) and Conducted Emissions (CE) testing wasperformed using Teseq’s Compliance 3e software package. This is a COTS product, withmany installations worldwide. The emissions software controls all the test instrumentation,corrects for all transducer and gain/loss factors, and plots the data against the appropriatelimit. The purpose of performing the pre-scan was to identify areas where emissions werepotentially from the EUT and over the specification limit; it was not used for finalmeasurements.

Verification of the setup is achieved by running a test program that injects a signal into theLISN for conducted emissions, and measures a stub antenna driven by a signal generator forradiated emissions.


The technical manager at L F Research is retained by Teseq in the USA for assistance in USAinstallations of this software.

Test EquipmentAll test equipment used for this testing was in fully working order and where appropriate,calibrated. The test equipment used is from leading companies in the EMC field; specifically,Agilent, Miteq, and Schaffner.

For equipment that operates under 500 MHz, calibrations are performed by L F Researchusing a HP 8751 Network analyzer. This instrument is traceable to NIST. For equipment thatoperates over 500 MHz, the equipment is returned to its manufacturer.

A list of equipment used for each test is provided in the respective test section.

Environmental ConditionsTesting was performed under local ambient Temperature, Pressure and Humidity conditions.Specifically, for all test the temperature was monitored to ensure that the test chamber limit of81°F was not exceeded.

Reference DocumentsThe following documents form part of this record either by direct reference or by implication:

A. N/A.

B. N/A.

C. Mil-Std 461F

D. ISO/IEC 17025: 2005 “General requirements for the competence of calibration andtesting laboratories”

E. UKAS LAB 34 “The Expression of Uncertainty in EMC Testing “


AbbreviationsThe following abbreviations are used in EMC testing, and may appear in this report:

Abbreviation Meaning

EMC Electromagnetic Compatibility

EUT Equipment Under Test

SE or AE Support Equipment or Auxiliary Equipment

LISN Line Impedance Stabilization Network

GRP Ground Reference Plane

RF Radio Frequency

RE Radiated Emissions

CE Conducted Emissions

CP Current Probe

ATP Acceptance Test Procedure

COTS Commercial Off The Shelf

ITE Information Technology Equipment


Figure C:1 Photograph of the Equipment Under Test


Figure C:2 Photograph showing the EUT monitor screen during testing

L.F. Research Technical Report: 2009-077.docx Page 13 of 42Section D: Conducted Emissions

Test Methodology – MIL STD 461F CE102 ConductedEmissionsThe procedure for performing this test is fully described in L F Research Work InstructionWI-010.

In summary, this test measures the noise produced by the EUT that appears at the primarypower input point.

Prior to testing, a signal generator was used to inject a test signal at 5 spot frequencies into theLISN at 6 dB below the limit. A variation of more than +/- 2 dB from anticipated numberswould have required an investigation.

Figure D:1 shows a photograph of the setup, specifically showing the LISN’s and the RFterminations.

The EUT is configured on the test surface with the power lead set to two metres allowing onlysufficient length to reach the LISN. The LISN is bonded to the ground plane by wide brassstraps.

Inside the LISN the voltage with respect to the GRP was sampled and routed to a monitorport. The monitored voltage was routed through a 20 dB precision attenuator protecting theEMC Analyzer located outside the test area.

When not in use, the RF port is terminated via a 50 Ohm RF termination.

The test was controlled by Teseq’s Compliance 3e software. The software manipulates theEMC Analyzer, compensates for test equipment gains and losses, and charts the results.

Figure D:2 shows the equipment configuration taken from the software.

Testing was performed in Mode 1.

Test UncertaintyThe detailed analysis of uncertainty for this test method is fully described in L F ResearchTechnical Report 2000-030.

In summary, the uncertainty is determined to be ± 2 dB.

Performance CriteriaThe Performance Criteria for this methodology was as follows:

The EUT shall, under all modes of operation, produce no electrical noise exceeding thelimit line on Figure CE 102-1 of Mil Std 461F.


Test ResultsThe graphical results of the Conducted Emissions testing are shown in figures D:3 and D:4according to the table below:

Power Connection Figure #

120 volts Line Figure D:3

120 volts Neutral Figure D:4

The graphical data was recorded with the measuring detector in the peak mode. The datarecorded shows data well under the test limit.

Test EquipmentThe following test equipment was used to perform this test:

Description Manufacturer Model

LISN Electrometrics+LFR 461F

Spectrum Analyzer Hewlett Packard 8566B

20 dB Attenuator Mini-circuits BW-N20W5+

RF terminations Pasternak 1 Watt 50 Ohms

Cable Times Microwave LMR-400

Test Controller L F Research Lab Server 1

Software Teseq Compliance 3e

Verification the test system was functioning was made before and after the test.


Figure D:1 Photograph showing the LISN, 20 dB attenuator andRF loads. Bond straps are at the rear of the LISN.Upper shows 120V Line. Lower shows 120V Neutral


Figure D:2 Test equipment configuration taken from the Compliance3e software

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50 microHenry LISNLISNGlobal LibraryMIL-STD 461D

20 dB Pad20 dB PadGlobal LibraryEquipment Factors

Cable Loss FactorsCE Cable lossesGlobal LibraryEquipment Factors

Spectrum AnalyserHP 8566B On-site driverUnified Measurement InstrumentGPIB - 18


CE

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Figure D:3 Plot Showing the 120 Volts Line Conducted Emissions


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Figure D:4 Plot Showing the 120 volts Neutral Conducted Emissions

L.F. Research Technical Report: 2009-077.docx Page 19 of 42Section E: Radiated Emissions

Test Methodology – MIL STD 461E RE102 RadiatedEmissions 2 MHz to 18 GHzThis test determines if a EUT is responsible for producing noise that radiates, either directlyfrom its housing, or cables that connect to it. This noise is generated internally to the EUTusually by means of electrical switching.

An E-Field antenna captures the noise emanating from the EUT and its cables. The resultingsignal from the antenna is sent to a measuring instrument where it is adjusted for factors in themeasurement chain. The compensated values are plotted graphically against Figure RE 102-4in MIL STD 461F.

Before testing began, an end to end check was made of the measurement system. For the 2MHz to 30 MHz frequency range, the ETS coupling network was applied to the monopole rodantenna, and a signal injected at five test frequencies. For 30 MHz to 18 GHz the antennacable was disconnected and a signal directly injected from a precision RF signal source.

Following the precision end to end test, a stub antenna and reference radiation sources wereused to ensure antenna functionality.

The test harness as supplied by Crystal was used for the testing. For this testing, ALL LISN’swere terminated in 50 ohms. Each LISN was bolted to the ground plane and verified as lessthan 2.5 milli-Ohms resistance from the LISN front panel to the front of the ground plane.

The EUT is a substantial metal object, with the noise producing circuits enclosed internally.In order to measure the highest emissions directly from the EUT, the side containing thebonding surface was placed on the ground plane. The EUT was situated approximately 10 cmfrom the front edge of the ground plane to enable the power cables to be positioned at 12 cmfrom the front edge. The video cable was routed to the front of the ground plane and run 10cm from the front edge of the ground plane for all its length. This cable was positioned closestto the front as it was considered the most likely to radiate. The keyboard and mouse cableswere routed close to the rear of the EUT and as soon as practical brought to the front of thebench to comply with routing guidelines in Para 4.3.8.6.1 of Mil Std 461F

The test equipment setup from Compliance 3e for performing radiated emissions from 2 MHzto 30 MHz is shown in Figure E:1a: the physical implementation of this is shown inFigure E:1b .The antenna is vertically polarized only: only this orientation was recorded.

The test equipment setup from Compliance 3e for performing radiated emissions from30 MHz to 1000 MHz is shown in Figure E:2a.

The Bi-Conical is a precision antenna, with excellent field orientation resolution. Therefore,testing over this frequency range was performed in both vertical and horizontal polarizations.


To comply with the antenna positioning requirements testing from 30 MHz to 200 MHz wasperformed with the antenna centered on the test set up. Figure E:2b shows this antennaposition.

To comply with the antenna positioning requirements testing from 200 MHz to 1000 MHzwas performed with the antenna centered on the EUT. Figure E:2c shows this antennaposition.

The test equipment setup from Compliance 3e for performing radiated emissions from 1 GHzto 18 GHz is shown in Figure E:3a. The DRWG horn is a precision antenna, with excellentfield orientation resolution. Therefore, testing over this frequency range was performed inboth vertical and horizontal polarizations. To comply with the antenna positioningrequirements testing from 1 GHz to 18 GHz was performed with the antenna centered on theEUT. Figure E:3b shows this antenna position.

The measuring instrument was a Spectrum Analyzer ( SA ), set to peak detector. Thebandwidths specified in Table II of MIL STD 461F were used. NO video filtering wasemployed. The step size for the SA was 20% of the 6dB bandwidth; the dwell time at eachstep was 20 milliseconds.

Test ResultsThe results of the radiated emissions testing are contained in Figures E:4 through E:10 asshown in the table below:

Frequency Range Polarization Figure Number

2 MHz to 30 MHz Vertical E:4

30 MHz to 200 MHzHorizontal E:5

Vertical E:6

200 MHz to 1000 MHzHorizontal E:7

Vertical E:8

1 GHz to 18 GHzHorizontal E:9

Vertical E:10


Test Equipment for RE 102The following Test equipment was used to perform this test:

Description Manufacturer Model

Semi Anechoic Shield Room Universal N/A

LISN’s Electrometrics + LFR 461F

50 ohm termination Bird 10-T-MN

Monopole EMCO 3301B

Calibration Adaptor ETS 3301CB

Bi-Conical Chase CBL6111B

DRWG Horn – 1 GHz to 18 GHz ETS 3117

Spectrum Analyzer Hewlett Packard HP8566B

Preamplifier Minicircuits ZFL-1000LN

Preamplifier Miteq AMF-30-010045-13

20 dB Attenuator’s Minicircuits BW-N20W5+

Emissions Software Schaffner Compliance 3e

Test Computer Server 1 2.8 GHz

Cable 1 ( Wall bulkhead to pre-amp ) Sucoflex 105

Cable 2 ( Antenna to wall bulkhead 1GHz to 18 GHz )

Sucoflex 105

Cable 3 ( Pre-amp to S.A. ) Sucoflex 105

Cable 4 ( antenna to bulkhead 10 kHz to1000 MHz )

Times Microwave LMR400

Measurement UncertaintyAn analysis of measurement uncertainty for Radiated Emissions was performed using UKASLAB 34 as a guide. In summary, the uncertainty is nominally +/- 3 dB.

PLEASE NOTE: Measurement Uncertainty should not be confused with accuracy. Theequipment accuracy fully complies with the tolerances stipulated in Para. 4.3.1. of Ref. A.


Figure E:1a The radiated emissions test setup from Compliance 3efor the frequency range 2 MHz to 30 MHz

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Monopole Rod AntennaEMCO3301B Active E-Field Rod 10 kHz to 30 MHz Oct 2006Global LibraryEquipment Factors

RE Cable lossesRE Cable lossesGlobal LibraryEquipment Factors

PreampMinicircuits Oct 2006Global LibraryEquipment Factors

SpectrumAnalyserHP 8566B On-site driverUnified Measurement InstrumentGPIB - 22


Figure E:1b Photograph showing the radiated emissions test setup forthe frequency range 2 MHz to 30 MHz


Bi-Log AntennaCBL6111Bi-LogGlobal LibraryEquipment Factors

PreampHighMinicircuits Oct 2006Global LibraryEquipment Factors

CableLossesRECable lossesGlobal LibraryEquipment Factors

SpectrumAnalyserHP8566BOn-site driverUnified Measurement InstrumentGPIB22

Figure E:2a The radiated emissions test setup from Compliance 3efor the frequency range 30 MHz to 1000 MHz


Figure E:2b The radiated emissions test setup for the frequency range30 MHz to 200 MHz


Figure E:2c The radiated emissions test setup for the frequency range200 MHz to 1000 MHz


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ETS 3117 HornETS 3117 Horn 1m Cal 1 GHz to 18 GHzGlobal LibraryEquipment Factors

1-18 GHzMiteq AmpGlobal LibraryEquipment Factors

RE Cable LossesRE Cable lossesGlobal LibraryEquipment Factors

Spectrum AnalyserHP 8566B On-site driverUnified Measurement InstrumentGPIB - 22

Figure E:3a The radiated emissions test setup from Compliance 3efor the frequency range 1 GHz to 18 GHz


Figure E:3b The radiated emissions test setup for the frequency range1 GHz to 18 GHz


RE

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Figure E:4 The radiated emissions data plot for the frequency range2 MHz to 30 MHz – Vert.


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Figure E:5 The radiated emissions data plot for the frequency range30 MHz to 200 MHz – Horz.


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Figure E:7 The radiated emissions data plot for the frequency range200 MHz to 1000 MHz – Horz.


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Figure E:9 The radiated emissions data plot for the frequency range1 GHz to 18 MHz – Horz.


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Figure E:10 The radiated emissions data plot for the frequency range1 GHz to 18 MHz – Vert.

L.F. Research Technical Report: 2009-077.docx Page 36 of 42Section F: L F Research EMC Test Facility

Test Facility – L F Research

LocationAll testing was performed at the L F Research EMC Facility, located at:

12790 Route 76,Poplar Grove,IL 61065, USA.Phone 815 742 0617FAX 815 547 3467Website www.lfresearch.com

DescriptionThe L F Research EMC Design and Test facility is a privately owned company, operated inaccordance with ISO 17025 by a NARTE certified EMC Engineer. In May of 2009, LFResearch span off several competencies to form a second company called EMC LaboratoryServices. The spin off allowed L F Research to return its focus back to EMC and ProductSafety design and testing. EMC Laboratory services provide support services to any EMClaboratory. Further details may be found on the following website: www.emclabservices.com.

L F Research is located on 23 acres of woodlands in rural Boone County, approximately 60miles West of Chicago, IL. The main building, some 40 feet by 30 feet, houses the shieldroom and workstations. A 50 feet by 80 feet building is under construction designed tospecifically house a 5 metre Semi anechoic chamber. The chamber will have a 50 HP drivestand for electrical power systems testing.

L F Research constructed the existing building specifically for EMC testing, and great carewas taken to ensure that the building provided a substantial degree of shielding againstambient EM fields. Figure F:1 shows a plan of the building. All masonry within the buildingis epoxy coated, and the above ground metal surfaces coated with Corbond Insulation,affording very low air and humidity infiltration. Heating is performed by a floor installedhydronic system. The end result is a tightly controlled test environment.

Approximately half the building is occupied by a semi-anechoic, double skinned, galvanizedsteel shield room, some 8 metres by 4 metres by 3 metres. The Universal Shielding Companyin New York, USA, manufactured the room. The lining is ETS supplied ferrite tile, coveringapproximately 100% of the ceiling and 40% of the walls. Line power for the room is suppliedthrough 100 amp filters. Separate unique filters supply power for DC equipment, 400 Hz, androom lighting. 3 feed through panels are installed, 1 for test signals, and 2 are configurable forEUT wiring. The room is climate controlled by 5 honeycombed vents. The 400 Hz is derivedfrom a 15 kVA Ex Military Generator. It is situated adjacent to the building so that only theminimum length of cable is required to reach the shield room. The 50 Hz and 60 Hz threephase power is supplied by a 60 kVA Ex Military Generator.

The second half of the building houses workbenches, office space, and a 4m by 3m groundplane. At the rear of the ground plane is a vertical conductive wall 3m wide by 2.5 m high.


The wall and ground plane are bonded continuously along their adjoining edge. This locationis where ESD, FTB, Surge, and Voltage dips and Interrupts testing are performed.

Test equipment and Instrumentation for each test method is addressed separately under uniqueheadings in the Test Data section of this record.

PersonnelAll testing was performed or supervised by Derek Walton, a NARTE certified EMC Engineerwith over 28 years of EMC Design and Test experience. Figure F:2 shows the currentNARTE Certificate covering the testing period.

He was contracted to A2LA as an EMC laboratory assessor, was a member of the A2LAAccreditation Council for 6 years before switching to NVLAP. In addition to performinginternal Quality system and technical audits for both manufacturers and independent testfacilities, he assumed EMC assessor duties for NVLAP beginning March of 2009.

He is an on-call RF Systems Specialist for Teseq EMC in the USA, and provides designexpertise for several companies that use the facility for their EMC testing.

A brief synopsis of positions held is listed below:

Current Professional Activities:N.A.R.T.E certified EMC engineer reference EMC-000438-NE.

Participant in SC 135 DO-160 Developments.

NVLAP Contracted EMC Assessor.

EMC Laboratory Assessor, Automotive Assessor and Registered Bluetooth facility Assessor

17025 Quality System Assessor.

Member of the Rockford Chamber of Commerce

Profiled in the Marquis Who's Who in the Midwest

Profiled in the America's Registry of Outstanding Professionals

Lapsed Professional Activities:Past Member of the RTCA DO-160 revision committee

A2LA Contracted EMC Assessor.

Member of the A2LA Accreditation Council, A2LA Criteria Council

Past Member of the SAE Automotive Standards review committee

Past Member of the Society of Automotive engineers ( SAE )

Past Member of the IEEE EMC Society: Chicago Chapter Chair March 1998 through 2002

Past Chairman of the IEEE EMC Chicago mini-symposium 1999 - 2002

Past Chairman of the 2005 IEEE International EMC Symposium


Positions Held:Jan. 09 to EMC Laboratory ServicesDate Joint Owner.

Mar 09 to National Institute of Standards and Technology ( NIST )Date Contracted EMC Laboratory Assessor.

Nov. 92 to L F Research EMC Test and Design FacilityDate Owner, Technical Manager

Aug. 99 to American Association for Laboratory Accreditation ( A2LA )Mar. 07 Contracted EMC Laboratory Assessor/ Accreditation Council Member

Jan. 01 to Schaffner EMC Inc.Aug. 06 Technical Systems Specialist

Feb. 96 to Barber-Colman Industrial Instruments, Loves-Park, IL 61132.Apr. 01 Job Title: Principle Engineer.

Dec. 95 to SUN Microcomputers, Chelmsford, MA.Feb. 96 Job Title: Consulting Compliance Engineer.

Nov. 92 to MICRO SWITCH Division of Honeywell, Freeport, IL61032.Dec. 95 Job Title: Sr. Principle Engineer.

Jly. 86 to Sundstrand ATG (Advanced Technology Group), Rockford, IL 61125.Nov. 92. Job Title: EME (Electromagnetic Effects) Manager.

1985 - Sundstrand ATG (Advanced Technology Group), Rockford, IL 61125.1986 Job Title: EMC (Electro-Magnetic Compatibility) Design Engineer

1980 - British Aerospace (Warton Division) PLC.1985 Job Title: Systems design and EMC Development/Test Engineer.


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Figure F:1 Plan of the L F Research EMC Test Facility


Figure F:2 Derek Walton’s NARTE Certification

L.F. Research Technical Report: 2009-077.docx Page 41 of 42Section G: Document Revision History

Document Revision History

DocumentNumber

Description Date

2009-077 Initial Document November 30th 2009

L.F. Research Technical Report: 2009-077.docx Page 42 of 42Section H: Request for Client Feedback

Request for Client FeedbackAs part of our process to improve on the services we offer, we invite you to take a fewmoments to provide feedback on the service you receive on this project. Please be frank, areasfrom our client point of view where we need to improve, need to come to our attention.

Once completed, please FAX or e-mail this page only to:

FAX: 815 547 3467 email: [email protected]

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