Analisi delle normative militari concernenti la compatibilità elettromagnetica e, in particolare, i Data Item EMC relativi alle procedure di prova, alle procedure di controllo ed alla stesura dei report. Pubblicata in occasione del seminario MIL nel 2017.

1. DI-EMCS
Control procedures
Test procedures
Test report
Alessandro Corniani
aco@volta.it

2. • MIL-STD-461G 6.3 – Associated Data Item Descriptions
(DIDs)
– This standard has been assigned an Acquisition Management
Systems Control (AMSC) number authorizing it as the source
document for the following DIDs. When it is necessary to
obtain the data, the applicable DIDs must be listed on the
Contract Data Requirements List (DD Form 1423).
– The above DIDs were current as of the date of this standard.
The ASSIST database should be researched at
http://quicksearch.dla.mil/ to ensure that only current and
approved DIDs are cited on the DD Form 1423.
MIL-STD-461G
DID Number DID Title
DI-EMCS-80199 Electromagnetic Interference Control Procedures (EMICP)
DI-EMCS-80201 Electromagnetic Interference Test Procedures (EMITP)
DI-EMCS-80200 Electromagnetic Interference Test Report (EMITR)

3. • Il DD Form 1423 è utilizzato per specificare e tracciare i
requirements di contratti e sub-contratti governativi. Se
usato per specificare un contratto, è definito CDRL
(Contract Data Requirements List) ed è una lista dei
requirements per dati autorizzati per approvvigionamento
specifico parte di un contratto.
• Si può avere un singolo DD Form 1423 o una serie di DD
Form 1423 individuali che contengono le informazioni di
riferimento da consegnare per specifica.
• Subpart 215.470 di DFARS richiede espressamente l’utilizzo
di CDRL nelle istanze in cui si chieda fornitura di dati. Le
CDRL dovrebbero essere associate direttamente ai SOW e
gestite dal Program office data manager.
• Il fine delle CDRL è di fornire un metodo standardizzato per
definire in modo chiaro e non ambiguo le necessità minime
di dati richiesti.
DD Form 1423
http://www.acq.osd.mil/dpap/dars/dfars/html/current/215_4.htm#215.470

4. DD Form 1423

5. • DoD 5010.12-M – Procedures for the
acquisition and management of technical data
– C3.1.2: All data requirements shall be consistent
with the data acquisition documents and tasking
requirements imposed by the contract and shall be
tailored, as appropriate, to ensure that only
essential data is acquired. Data acquisition
documents are defined as only those DIDs,
specifications, and standards listed in DoD
5010.12-L (reference (a)), or one-time DIDs
prepared in accordance with DoD-STD-963
(reference (g)) that provides the authorized format
and content of all data requirements listed on DD
Form 1423. [...]
DoD 5010.12-M

6. • DoD 5010.12-M C3.3 – DD FORM
1423, CONTRACT DATA
REQUIREMENTS LIST (CDRL)
• Il capitolo specifica e spiega in modo
dettagliato come compilare un CDRL
su DD Form 1423.
DoD 5010.12-M

7. • MIL-STD-461: 1967 e -461A: 1968
fanno riferimento nella norma
• MIL-STD-461B: 1980 fa riferimento a
DI-R-7061, DI-R-7063 e DI-R-7062
• Da MIL-STD-461C: 1986 si fa
riferimento a DI-EMCS-80199,
DI-EMCS-80201 e DI-EMCS-80201
MIL-STD-461

8. • DI-EMCS-80199: 1986
• DI-EMCS-80199A: 1993
– Su DD Form 1664, necessità eliminata
da MIL-STD-963B 4.3 (1997)
• DI-EMCS-80199B: 1999
• DI-EMCS-80199C: 2007
• DI-EMCS definisce le procedure di
controllo (EMICP)
DI-EMCS-80199 - EMICP
http://www.dtic.mil/whs/directives/forms/forminfo/forminfopage2175.html

9. • 1. Reference documents. The applicable issue of the documents cited
herein, including their approval dates and dates of any applicable
amendments, notices, and revisions, shall be as specified in the contract.
• 2. Format. Contractor format is acceptable.
• 3. Content. The EMICP shall contain the following:
– 3.1. Management. The EMICP shall address the following management areas:
• a. Specific organizational responsibilities, lines of authority and control, and program
planning, including milestones and schedules.
• b. Detailed EMI requirements imposed on subcontractors.
• c. Role in program of Government Furnished Equipment and subcontractor items.
• d. Description of the equipment or subsystem, its function, characteristics, and intended
installation.
• e. Plans and procedures for identifying and resolving potential EMI problems,
implementing solutions, and verifying solutions through analysis and testing.
• f. Point of contact for EMI technical issues.
DI-EMCS-80199 - EMICP

10. – 3.2. Design techniques and procedures. The EMICP shall describe the specific
design techniques and procedures used to meet each emission and susceptibility
requirement, including the following:
• a. Spectrum management techniques.
• b. EMI mechanical design, including the following:
– (1) Type of metals, casting, finishes, and hardware employed in the design.
– (2) Construction techniques, such as isolated compartments; filter mounting, isolation of other
parts; treatment of openings (ventilation ports, access hatches, windows, metal faces and control
shafts), and attenuation characteristics of Radio Frequency (RF) gaskets used on mating surfaces.
– (3) Shielding provisions and techniques used for determining shielding effectiveness.
– (4) Corrosion control procedures.
– (5) Methods of bonding mating surfaces, such as surface preparation and gaskets.
• c. Electrical wiring design, including cable types or characteristics, cable routing, cable
separation, grounding philosophy, and cable shielding types and termination methods.
• d. Electrical and electronic circuit design, including the following:
– (1) Filtering techniques, technical reasons for selecting types of filters, and associated filter
characteristics, including attenuation and line-to-ground capacitance values of AC and DC power
line filters.
– (2) Part location and separation for reducing EMI.
– (3) Location, shielding, and isolation of critical circuits.
DI-EMCS-80199 - EMICP

11. – 3.3. Analysis. The EMICP shall provide analysis results demonstrating how each
applicable requirement is going to be met.
– 3.4. Developmental testing. The EMICP shall include a discussion of testing to be
performed during development (such as evaluations of breadboards, prototypes,
and engineering models).
DI-EMCS-80199 - EMICP

12. • DI-EMCS-80201: 1986
• DI-EMCS-80201A: 1993
– Su DD Form 1664, necessità eliminata
da MIL-STD-963B 4.3 (1997)
• DI-EMCS-80201B: 1999
• DI-EMCS-80201C: 2007
• DI-EMCS definisce le procedure di
test (EMITP)
DI-EMCS-80201 - EMITP
http://www.dtic.mil/whs/directives/forms/forminfo/forminfopage2175.html

13. • 1. Reference documents. The applicable issue of the documents cited
herein, including their approval dates and dates of any applicable
amendments, notices, and revisions, shall be as specified in the contract.
• 2. Format. Contractor format is acceptable.
• 3. Content. The EMITP shall contain the following:
– 3.1. Introduction. The introduction of the EMITP shall include the following:
• a. A table describing all the tests to be performed, the applicable section within the EMITP, and the
corresponding test procedure from MIL-STD-461.
• b. Description of the Equipment Under Test (EUT), including its function, characteristics,
intended installation, and power usage.
• c. Approved exceptions or deviations from contractual test requirements, if any.
– 3.2. Applicable documents. Applicable documents shall be listed as follows:
• a. Military (such as standards and specifications).
• b. Company (such as in-house documents used for calibration or quality assurance).
• c. Other Government or industry standards, specifications, and documents.
– 3.3. Test site. A description of the test site shall be provided covering the
following:
• a. Test facility and shielded enclosure or anechoic chamber, including size, characteristics, and
placement of radio frequency (RF) absorbers.
• b. Ground plane (size and type) and methods of grounding or bonding the EUT to the ground plane to
simulate actual equipment installation.
• c. Implementation of test precautions required by 4.3.7 of MIL-STD-461.
DI-EMCS-80201 - EMITP

14. – 3.4. Test instrumentation. Test instrumentation to be used shall be described as
follows:
• a. Equipment nomenclature.
• b. Characteristics of coupling transformers and band-reject filters.
• c. Antenna factors of specified antennas, transfer impedances of current probes, and impedance of
Line Impedance Stabilization Networks (LISN).
• d. Description of the operations being directed by software for computer-controlled instrumentation,
the verification techniques used to demonstrate proper performance of the software, and the specific
versions of the software to be used. In addition, sweep times, correction factors and how are
they used, how final data are determined and presented, and an audit trail that provides
details on what part of the software controls each function shall be described.
• e. Bandwidth (resolution and video) and scanning speeds of measurement receivers.
• f. Modulation characteristics and scan rates of the susceptibility test signals.
– 3.5. EUT setup. A description of the EUT test setup for each test shall cover
the following:
• a. Physical layout of the cables and EUT.
• b. Cable types, characteristics, and construction details (see 4.3.8.6 of MIL-STD-461)
• c. Position of the line impedance stabilization networks on the ground plane.
• d. Use of bond straps and loads.
• e. Test simulation and monitoring equipment.
DI-EMCS-80201 - EMITP

15. – 3.6. EUT operation. A description of the EUT operation shall cover the following:
• a. Modes of operation for each test, including operating frequencies (where applicable), and rationale for
selection.
• b. Control settings on the EUT.
• c. Control settings on any test stimulation and monitoring equipment and characteristics of input signals.
• d. Operating frequencies (such as oscillator and clock frequencies) which may be expected to approach
limits.
• e. Performance checks initiated to designate the equipment as meeting minimal working standard
requirements.
• f. Enumeration of circuits, outputs, or displays to be monitored during susceptibility testing, as well as the
criteria for monitoring degradation of performance.
– 3.7. Measurements. The following shall be described for each test.
• a. Block diagram depicting test setup, including all pertinent dimensions.
• b. Step-by-step procedures.
• c. Test equipment used in performance of the test and the methods of grounding, bonding, or
achieving electrical isolation of the measurement instrumentation.
• d. Selection of measurement frequencies.
• e. Information to be recorded during the test, including frequency and units of recorded information.
Sample data sheets, test logs and graphs, including test limits, may be shown.
DI-EMCS-80201 - EMITP

16. • DI-EMCS-80200: 1986
• DI-EMCS-80200A: 1993
– Su DD Form 1664, necessità eliminata
da MIL-STD-963B 4.3 (1997)
• DI-EMCS-80200B: 1999
• DI-EMCS-80200C: 2007
• DI-EMCS definisce i test report
(EMITR)
DI-EMCS-80200 - EMITR
http://www.dtic.mil/whs/directives/forms/forminfo/forminfopage2175.html

17. • 1. Reference documents. The applicable issue of the documents cited
herein, including their approval dates and dates of any applicable
amendments, notices, and revisions, shall be as specified in the contract.
• 2. Format. Contractor format is acceptable.
• 3. Content. The EMITR shall contain the following:
– 3.1 Administrative data. The EMITR shall contain an administrative section
covering the following:
• a. Contract number.
• b. Authentication and certification of performance of the tests by a qualified
representative of the procuring activity.
• c. Disposition of the Equipment Under Test (EUT).
• d. Description of the EUT, including its function, characteristics, intended installation,
actual cable types (characteristics and construction details - see 4.3.8.6 of MIL-STD-
461), and electrical current usage on each power input line.
• e. List of tests performed with pass/fail indications.
• f. Any approved deviations from contractual test procedures or limits previously
authorized.
• g. Identification of Non-Developmental Items (NDI) and Government Furnished
Equipment (GFE) that may be part of the EUT.
• h. Traceability of test equipment calibration.
• i. A reference to the approved EMI test procedure (EMITP).
DI-EMCS-80200 - EMITR

18. – 3.2 Detailed results. A separate appendix shall be prepared for each test. If
deviations from an approved test procedure occurred during the test program,
an additional appendix shall be provided with the “as run” procedures showing
all red-lines and procuring activity concurrence. A separate appendix shall be
provided for log sheets. Each test appendix shall contain the following factual
data:
• a. Test equipment nomenclature, serial numbers, version of software used (if any), and calibration
due date.
• b. Photographs or diagrams of the actual test set up and EUT, with identification.
• c. Transfer impedance of current probes.
• d. Antenna factors.
• e. Impedance values of Line Impedance Stabilization Networks (LISN).
• f. Identification of any suppression devices used to meet the contractual requirements, including
schematics, performance data, and drawings.
• g. Sample calculations, such as conversions of measured levels for comparison against the applicable
limit.
• h. The ambient radiated and conducted electromagnetic emission profile of the test facility, when
necessary.
• i. Data, and data presentation, as specified in the “data presentation” sections of the individual test
procedures of MIL-STD-461. Emissions data cannot be provided on one single sheet (plot).
Provide a minimum frequency resolution of 1% or twice the measurement receiver
bandwidth, whichever is less stringent, and a minimum amplitude resolution of 1 dB for
each plot.
DI-EMCS-80200 - EMITR

19. – 3.2 Detailed results. A separate appendix shall be prepared for each test. If
deviations from an approved test procedure occurred during the test program,
an additional appendix shall be provided with the “as run” procedures showing
all red-lines and procuring activity concurrence. A separate appendix shall be
provided for log sheets. Each test appendix shall contain the following factual
data:
• j. Scan speeds.
• k. Measurement receiver bandwidths.
• l. Antenna polarization.
• m. Power line voltages, frequencies, and power factor.
• n. Low-noise amplifiers (LNA) compression points.
• o. Test susceptibilities and deviations from normal performance are not acceptable.
However, when susceptibility indications or deviations from normal performance are noted
in the EUT operation, a threshold level shall be determined where the susceptible condition
or deviation is no longer present. These thresholds need to be documented for further
assessment.
– 3.3 Conclusions and recommendations. Conclusions and recommendations
shall be provided, including results of the tests in brief narrative form, a
discussion of any remedial actions already initiated, and proposed corrective
measures required (if necessary) to assure compliance of the equipment or
subsystem with the contractual EMI requirements.
DI-EMCS-80200 - EMITR