DI-EMCS-80201C

Electromagnetic Interference Test Procedures (EMITP)

The EMITP describes the measurement procedures used to demonstrate that an equipment or subsystem complies with its contractual electromagnetic interference (EMI) requirements based on MIL-STD-461.

Approval DateNovember 30, 2007

AMSC NumberF9032

Preparing Activity—

Project Number—

OPR11 (ASC/ENA)

DTIC Applicable—

GIDEP Applicable—

Limitation—

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatdd_form_1664

963C CompliantNo

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

DI-EMCS-80201B

DI-EMCS-80199CDI-EMCS-80200C

Description & Purpose

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Application & Interrelationship

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Use & Relationship

The EMITP describes the measurement procedures that will be used to demonstrate that an equipment or subsystem complies with its contractual electromagnetic interference (EMI) requirements based on MIL-STD-461, including how the general test procedures in the standard will be applied to the specific equipment or subsystem.

a. This Data Item Description (DID) contains the format, content, and intended use information for the data deliverable resulting from the work task described for EMITP in paragraph 5.1 of MIL-STD-461.

b. This DID is related to DI-EMCS-80199C, Electromagnetic Interference Control Procedures (EMICP), and DI-EMCS-80200C, Electromagnetic Interference Test Report (EMITR).

c. DI-EMCS-80201C supersedes DI-EMCS-80201B.

Preparation Instructions

1Reference 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.

2Format.Contractor format is acceptable.

3Content.The EMITP shall contain the following:

3.1Introduction.The introduction of the EMITP shall include the following:

3.1.1A table describing all the tests to be performed, the applicable section within the EMITP, and the corresponding test procedure from MIL-STD-461.

3.1.2Description of the Equipment Under Test (EUT), including its function, characteristics, intended installation, and power usage.

3.1.3Approved exceptions or deviations from contractual test requirements, if any.

3.2Applicable documents.Applicable documents shall be listed as follows:

3.2.1Military (such as standards and specifications).

3.2.2Company (such as in-house documents used for calibration or quality assurance).

3.2.3Other Government or industry standards, specifications, and documents.

3.3Test site.A description of the test site shall be provided covering the following:

3.3.1Test facility and shielded enclosure or anechoic chamber, including size, characteristics, and placement of radio frequency (RF) absorbers.

3.3.2Ground plane (size and type) and methods of grounding or bonding the EUT to the ground plane to simulate actual equipment installation.

3.3.3Implementation of test precautions required by 4.3.7 of MIL-STD-461.

3.4Test instrumentation.Test instrumentation to be used shall be described as follows:

3.4.1Equipment nomenclature.

3.4.2Characteristics of coupling transformers and band-reject filters.

3.4.3Antenna factors of specified antennas, transfer impedances of current probes, and impedance of Line Impedance Stabilization Networks (LISN).

3.4.4Description 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.

3.4.5Bandwidth (resolution and video) and scanning speeds of measurement receivers.

3.4.6Modulation characteristics and scan rates of the susceptibility test signals.

3.5EUT setup.A description of the EUT test setup for each test shall cover the following:

3.5.1Physical layout of the cables and EUT.

3.5.2Cable types, characteristics, and construction details (see 4.3.8.6 of MIL-STD-461)

3.5.3Position of the line impedance stabilization networks on the ground plane.

3.5.4Use of bond straps and loads.

3.5.5Test simulation and monitoring equipment.

3.6EUT operation.A description of the EUT operation shall cover the following:

3.6.1Modes of operation for each test, including operating frequencies (where applicable), and rationale for selection.

3.6.2Control settings on the EUT.

3.6.3Control settings on any test stimulation and monitoring equipment and characteristics of input signals.

3.6.4Operating frequencies (such as oscillator and clock frequencies) which may be expected to approach limits.

3.6.5Performance checks initiated to designate the equipment as meeting minimal working standard requirements.

3.6.6Enumeration of circuits, outputs, or displays to be monitored during susceptibility testing, as well as the criteria for monitoring degradation of performance.

3.7Measurements.The following shall be described for each test.

3.7.1Block diagram depicting test setup, including all pertinent dimensions.

3.7.2Step-by-step procedures.

3.7.3Test equipment used in performance of the test and the methods of grounding, bonding, or achieving electrical isolation of the measurement instrumentation.

3.7.4Selection of measurement frequencies.

3.7.5Information 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.

References

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